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Search DetailsTAKAHASHI YoshiyukiGraduate School of Science / Division of PlanetologyAssociate Professor
Research activity information
■ Paper- Meteorological Society of Japan, 2024, Journal of the Meteorological Society of Japan. Ser. II, 102(5) (5), 469 - 483Scientific journal
- Meteorological Society of Japan, 2024, Journal of the Meteorological Society of Japan. Ser. II, 102(1) (1), 5 - 16Scientific journal
- Meteorological Society of Japan, 2023, Journal of the Meteorological Society of Japan. Ser. II[Refereed]Scientific journal
- American Geophysical Union (AGU), Jun. 2021, Journal of Geophysical Research: Atmospheres, 126(11) (11)[Refereed]Scientific journal
- Direct-imaging techniques of exoplanets have made significant progress recently and will eventually enable monitoring of photometric and spectroscopic signals of Earth-like habitable planets. The presence of clouds, however, would remain as one of the most uncertain components in deciphering such direct-imaged signals of planets. We attempt to examine how the planetary obliquity produces different cloud patterns by performing a series of general circulation model simulation runs using a set of parameters relevant for our Earth. Then we use the simulated photometric lightcurves to compute their frequency modulation that is due to the planetary spin-orbit coupling over an entire orbital period, and we attempt to see to what extent one can estimate the obliquity of an Earth twin. We find that it is possible to estimate the obliquity of an Earth twin within the uncertainty of several degrees with a dedicated 4 m space telescope at 10 pc away from the system if the stellar flux is completely blocked. While our conclusion is based on several idealized assumptions, a frequency modulation of a directly imaged Earth-like planet offers a unique methodology to determine its obliquity.American Astronomical Society, Jul. 2020, The Astrophysical Journal, 898(2) (2), 95 - 95, English[Refereed]Scientific journal
- The existence of liquid water within an oxidized environment on early Mars has been inferred by the Mn-rich rocks found during recent explorations on Mars. The oxidized atmosphere implied by the Mn-rich rocks would basically be comprised of CO2 and H2O without any reduced greenhouse gases such as H-2 and CH4. So far, however, it has been thought that early Mars could not have been warm enough to sustain water in liquid form without the presence of reduced greenhouse gases. Here, we propose that H2O2 could have been the gas responsible for warming the surface of the oxidized early Mars. Our one-dimensional atmospheric model shows that only 1 ppm of H2O2 is enough to warm the planetary surface because of its strong absorption at far-infrared wavelengths, in which the surface temperature could have reached over 273 K for a CO2 atmosphere with a pressure of 3 bar. A wet and oxidized atmosphere is expected to maintain sufficient quantities of H2O2 gas in its upper atmosphere due to its rapid photochemical production in slow condensation conditions. Our results demonstrate that a warm and wet environment could have been maintained on an oxidized early Mars, thereby suggesting that there may be connections between its ancient atmospheric redox state and possible aqueous environment.American Astronomical Society, Apr. 2020, The Astrophysical Journal, 893(2) (2), 168 - 168, English[Refereed]Scientific journal
- Cloud patterns are important clues for revealing the atmospheric circulation of Venus. Recently, a planetary-scale streak structure has been discovered in middle- and lower-cloud images of Venus' night-side taken by IR2, the 2-mu m camera, on board the Akatsuki orbiter. However, its formation mechanism has not been investigated. Here we succeed, for the first time, in reproducing the patterns of the observed streak structure, as regions of strong downward flows that develop in high-resolution global simulations of the Venus atmosphere. The streaks are formed in both hemispheres with equatorial symmetry, which is caused by equatorial Rossby-like and Kelvin-like waves with zonal wavenumber one. The low-stability layer that has been suggested by past observations is essential for reproducing the streak structure. The streaks of downward flow result from the interaction of the meridionally tilted phase lines of the Rossby-like waves and the characteristics of baroclinic instability produced around the low-stability layer.NATURE PUBLISHING GROUP, Jan. 2019, NATURE COMMUNICATIONS, 10(10) (10), 23, English[Refereed]Scientific journal
- 金星大気の全球的な流れを計算する数値モデル「AFES-Venus」とそれを用いた数値実験・データ同化について紹介する.AFES-Venusは,金星大気の惑星規模筋状構造や周極低温域,大気安定度の地方時依存性などの再現に成功している.AFES-Venusでは,高度55 km付近に低安定度層を導入したことと,空間解像度を高めたことによって,傾圧不安定の発達が計算されるようになった.数値実験により,傾圧不安定の発達が,金星大気の現実的な風速・温度場の再現にとって重要であることが分かってきた.また我々は,AFES-Venusを用いたデータ同化システムも開発しており,「あかつき」による観測を反映した現実的かつ時空間的に偏りのない金星大気のデータセットの創出や,個々の観測の重要度評価による観測計画立案への貢献も目指している.The Japanese Society for Planetary Sciences, Dec. 2018, Planetary People - The Japanese Society for Planetary Sciences, 27(4) (4), 314 - 319, Japanese
- Mar. 2018, Fundamental Aspects of Geophysical Turbulence IIINumerical study on small scale vortices in Mars's lower atmosphere[Refereed]International conference proceedings
- In order to investigate a possible variety of atmospheric states realized on a synchronously rotating aqua planet, an experiment studying the impact of planetary rotation rate is performed using an atmospheric general circulation model (GCM) with simplified hydrological and radiative processes. The entire planetary surface is covered with a swamp ocean. The value of planetary rotation rate is varied from zero to the Earth's, while other parameters such as planetary radius, mean molecular weight and total mass of atmospheric dry components, and solar constant are set to the present Earth's values. The integration results show that the atmosphere reaches statistically equilibrium states for all runs; none of the calculated cases exemplifies the runaway greenhouse state. The circulation patterns obtained are classified into four types: Type-I characterized by the dominance of a day-night thermally direct circulation, Type-II characterized by a zonal wave number one resonant Rossby wave over a meridionally broad westerly jet on the equator, Type-III characterized by a long time scale north-south asymmetric variation, and Type-IV characterized by a pair of mid-latitude westerly jets. With the increase of planetary rotation rate, the circulation evolves from Type-I to Type-II and then to Type-III gradually and smoothly, whereas the change from Type-Ill to Type-IV is abrupt and discontinuous. Over a finite range of planetary rotation rate, both Types-III and -IV emerge as statistically steady states, constituting multiple equilibria. In spite of the substantial changes in circulation, the net energy transport from the day side to the night side remains almost insensitive to planetary rotation rate, although the partition into dry static energy and latent heat energy transports changes. The reason for this notable insensitivity is that the outgoing longwave radiation over the broad area of the day side is constrained by the radiation limit of a moist atmosphere, so that the transport to the night side, which is determined as the difference between the incoming solar radiation and the radiation limit, cannot change greatly. (C) 2016 The Authors. Published by Elsevier Inc.ACADEMIC PRESS INC ELSEVIER SCIENCE, Jan. 2017, ICARUS, 282, 1 - 18, English[Refereed]Scientific journal
- American Meteorological Society, Oct. 2016, Journal of the Atmospheric Sciences, 73(10) (10), 4151 - 4169, English[Refereed]Scientific journal
- 2016, Geophysical Research Letters, 43(9) (9), English[Refereed]Scientific journal
- 2014, 宇宙科学情報解析論文誌, 3, 147 - 153, Japanese地球流体電脳倶楽部 DCMODELプロジェクトと数値モデルを用いた惑星大気研究について[Refereed]Scientific journal
- In this paper, we examine the steady state responses of models participating in the Aqua-Planet Experiment Project (APE) to the zonal asymmetry of equatorial sea surface temperature (SST) anomalies (SSTAs). Experiments were performed using three different SSTA distributions, i.e., two localized SSTAs with a common shape but different intensities, and an SSTA that varied with zonal wavenumber one. The structure of the responses obtained differs significantly among the models; however, some common features are also present.The principal features of the responses to the localized SSTAs are a positive precipitation anomaly over the warm SSTA, a widespread negative precipitation anomaly along the intertropical convergence zone, a pair of Rossby wavetrains along the equatorward flanks of mid-latitude westerly jets originating from a pair of upper tropospheric anticyclones that develop to the east of the warm SSTAs, and zonally wavelike precipitation and geopotential anomalies along the baroclinic zones. The structure of the tropical responses differs considerably from the Matsuno-Gill pattern, and the magnitude of the responses is almost proportional to the intensity of the localized SSTA in each of the models.The responses to the zonal wavenumber one SSTA are dominated by zonal wavenumber one structures. Around the longitudes of the warm (cold) SSTA, tropical precipitation increases (decreases). At longitudes east of the positive precipitation anomaly, the region of nearly zero absolute vorticity near the equator in the upper troposphere expands polewards, and the midlatitude westerly jets become narrower and stronger. To the west of the positive precipitation anomaly, the upper tropospheric region of nearly zero absolute vorticity shrinks, and the mid-latitude jets become weaker but broader, so that the regions of westerly winds extends to the equator, which results in the development of a zonal mean westerly wind anomaly around the equator. The longitudinal shift of the upper tropospheric westerly zonal wind anomaly relative to the precipitation anomaly is in marked contrast to that associated with the Walker circulation and the convection center around the Maritime Continent.METEOROLOGICAL SOC JAPAN, Sep. 2013, JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 91A, 143 - 193, English[Refereed]Scientific journal
- Climate simulations by 16 atmospheric general circulation models (AGCMs) are compared on an aqua-planet, a water-covered Earth with prescribed sea surface temperature varying only in latitude. The idealised configuration is designed to expose differences in the circulation simulated by different models. Basic features of the aqua-planet climate are characterised by comparison with Earth.The models display a wide range of behaviour. The balanced component of the tropospheric mean flow, and mid-latitude eddy covariances subject to budget constraints, vary relatively little among the models. In contrast, differences in damping in the dynamical core strongly influence transient eddy amplitudes. Historical uncertainty in modelled lower stratospheric temperatures persists in APE.Aspects of the circulation generated more directly by interactions between the resolved fluid dynamics and parameterized moist processes vary greatly. The tropical Hadley circulation forms either a single or double inter-tropical convergence zone (ITCZ) at the equator, with large variations in mean precipitation. The equatorial wave spectrum shows a wide range of precipitation intensity and propagation characteristics. Kelvin mode-like eastward propagation with remarkably constant phase speed dominates in most models. Westward propagation, less dispersive than the equatorial Rossby modes, dominates in a few models or occurs within an eastward propagating envelope in others. The mean structure of the ITCZ is related to precipitation variability, consistent with previous studies.The aqua-planet global energy balance is unknown but the models produce a surprisingly large range of top of atmosphere global net flux, dominated by differences in shortwave reflection by clouds. A number of newly developed models, not optimised for Earth climate, contribute to this. Possible reasons for differences in the optimised models are discussed.The aqua-planet configuration is intended as one component of an experimental hierarchy used to evaluate AGCMs. This comparison does suggest that the range of model behaviour could be better understood and reduced in conjunction with Earth climate simulations. Controlled experimentation is required to explore individual model behaviour and investigate convergence of the aqua-planet climate with increasing resolution.METEOROLOGICAL SOC JAPAN, Sep. 2013, JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 91A, 17 - 56, English[Refereed]Scientific journal
- Aug. 2013, Journal of Meteorological Society, Japan, 91A, doi:10.2151/jmsj.2013-A05, EnglishThe variety of forced atmospheric structure in response to tropical SST anomaly found in APE results[Refereed]Scientific journal
- In this paper, we examine the steady state responses of models participating in the Aqua-Planet Experiment Project (APE) to the zonal asymmetry of equatorial sea surface temperature (SST) anomalies (SSTAs). Experiments were performed using three different SSTA distributions, i.e., two localized SSTAs with a common shape but different intensities, and an SSTA that varied with zonal wavenumber one. The structure of the responses obtained differs significantly among the models; however, some common features are also present. The principal features of the responses to the localized SSTAs are a positive precipitation anomaly over the warm SSTA, a widespread negative precipitation anomaly along the intertropical convergence zone, a pair of Rossby wavetrains along the equatorward flanks of mid-latitude westerly jets originating from a pair of upper tropospheric anticyclones that develop to the east of the warm SSTAs, and zonally wavelike precipitation and geopotential anomalies along the baroclinic zones. The structure of the tropical responses differs considerably from the Matsuno-Gill pattern, and the magnitude of the responses is almost proportional to the intensity of the localized SSTA in each of the models. The responses to the zonal wavenumber one SSTA are dominated by zonal wavenumber one structures. Around the longitudes of the warm (cold) SSTA, tropical precipitation increases (decreases). At longitudes east of the positive precipitation anomaly, the region of nearly zero absolute vorticity near the equator in the upper troposphere expands polewards, and the midlatitude westerly jets become narrower and stronger. To the west of the positive precipitation anomaly, the upper tropospheric region of nearly zero absolute vorticity shrinks, and the mid-latitude jets become weaker but broader, so that the regions of westerly winds extends to the equator, which results in the development of a zonal mean westerly wind anomaly around the equator. The longitudinal shift of the upper tropospheric westerly zonal wind anomaly relative to the precipitation anomaly is in marked contrast to that associated with the Walker circulation and the convection center around the Maritime Continent. © 2013, Meteorological Society of Japan.2013, Journal of the Meteorological Society of Japan, 91(1 A) (1 A), 143 - 193[Refereed]Scientific journal
- This paper explores the sensitivity of Atmospheric General Circulation Model (AGCM) simulations to changes in the meridional distribution of sea surface temperature (SST). The simulations are for an aqua-planet, a water covered Earth with no land, orography or sea-ice and with specified zonally symmetric SST. Simulations from 14 AGCMs developed for Numerical Weather Prediction and climate applications are compared. Four experiments are performed to study the sensitivity to the meridional SST profile. These profiles range from one in which the SST gradient continues to the equator to one which is flat approaching the equator, all with the same maximum SST at the equator.The zonal mean circulation of all models shows strong sensitivity to latitudinal distribution of SST. The Hadley circulation weakens and shifts poleward as the SST profile flattens in the tropics. One question of interest is the formation of a double versus a single ITCZ. There is a large variation between models of the strength of the ITCZ and where in the SST experiment sequence they transition from a single to double ITCZ. The SST profiles are defined such that as the equatorial SST gradient flattens, the maximum gradient increases and moves poleward. This leads to a weakening of the mid-latitude jet accompanied by a poleward shift of the jet core. Also considered are tropical wave activity and tropical precipitation frequency distributions. The details of each vary greatly between models, both with a given SST and in the response to the change in SST.One additional experiment is included to examine the sensitivity to an off-equatorial SST maximum. The upward branch of the Hadley circulation follows the SST maximum off the equator. The models that form a single precipitation maximum when the maximum SST is on the equator shift the precipitation maximum off equator and keep it centered over the SST maximum. Those that form a double with minimum on the equatorial maximum SST shift the double structure off the equator, keeping the minimum over the maximum SST. In both situations only modest changes appear in the shifted profile of zonal average precipitation. When the upward branch of the Hadley circulation moves into the hemisphere with SST maximum, the zonal average zonal, meridional and vertical winds all indicate that the Hadley cell in the other hemisphere dominates.Meteorological Society of Japan, 2013, Journal of the Meteorological Society of Japan. Ser. II, 91A, 57 - 89, English[Refereed]Scientific journal
- A non-negative filter is developed to avoid negative values that may be produced in the interpolation of a non-conservative semi-Lagrangian advection scheme of tracers. Non-negativity is realized by a variable transformation with a function using arcsine. One-dimensional advection tests show that the proposed filter eliminates negative values of the mixing ratio and reduces error, whereas other non-negative filters (e. g., the global hole filling method) increase error. The variable transformation with the arcsine function efficaciously reduces the error in the region where the mixing ratio is zero, with a small counter effect to non-zero values. The proposed filter is very simple, so that it can be used in multi-dimensional schemes without modification and can be combined with other filters, such as a mass fixer and a monotonic filter.METEOROLOGICAL SOC JPN, 2013, SOLA, 9, 125 - 128, English[Refereed]Scientific journal
- 2013, Theoretical and Applied Mechanics, 61, 11 - 21, EnglishBaroclinic modes in the atmosphere on Venus simulated by AFES[Refereed]Scientific journal
- We examine the results of the Aqua-Planet Experiment Project (APE), focusing mainly on the structure of equatorial precipitation in the subset of participating models for which the details of model variables are available. Despite the unified setup of the APE, the Hovmöllor plots of precipitation in the models exhibit a considerable degree of diversity, presumably as a result of the diversity among the implementation of the various physical processes. Nevertheless, the wave number-frequency spectra of precipitation show certain similarities, and the power spectra can be divided into Kelvin, westward inertio-gravity, and "advective" components. The intensity of each of these three components varies significantly among different models. The composite spatial structures corresponding to these three components are produced by performing regression analysis with space-time filtered data. The composite horizontal structures of the Kelvin and westward inertio-gravity components are similar among the models, and resemble those expected from the corresponding equatorial shallow-water wave modes. These resemblances degrade at the altitude levels where the value of phase velocity approaches the zonal mean zonal wind speed. The horizontal structure of the advective component diverges significantly among the models. The composite vertical structures are strongly model dependent for all three components. The comparison of the vertical and horizontal structures associated with convective and stratiform heating of the composite disturbances indicates that the diversity of the vertical structures originates from differences in the implementation of the physical processes, especially the implementation of cumulus parameterization. © 2013, Meteorological Society of Japan.2013, Journal of the Meteorological Society of Japan, 91(1 A) (1 A), 91 - 141, English[Refereed]Scientific journal
- Nov. 2012, National Center for Atmospheric Research, English[Refereed]Scientific journal
- 2012, 遊星人, 21, 39—44, Japanese木星の大気構造と雲対流[Refereed]Scientific journal
- 2012, Proceedings of International Conference on Simulation Technology, ID73, EnglishToward high resolution simulation for theatmosphere on Venus by AFES (Atmospheric GCM For the Earth Simulator)[Refereed]Scientific journal
- Numerical Modeling for Venus Atmosphere Based on AFES (Atmospheric GCM for the Earth Simulator)In order to elucidate phenomena of Venus atmosphere, an atmospheric general circulation model (AGCM) for Venus is being developed on the basis of AFES (AGCM For the Earth Simulator). As a first step toward high resolution numerical simulation with realistic physical processes, we investigate unstable modes on the condition of super-rotation by nonlinear numerical simulation with simplified physical processes. At initial state zonal super-rotation is assumed to exist. We use the relaxation forcing of the meridional temperature gradient to maintain the zonal flow. In the time evolution of this experimental setting, baroclinic modes grow in the cloud layer with small static stability. The structures of unstable modes are similar to those obtained in the linear stability analysis. We discuss resolution dependency of the results.SPRINGER-VERLAG BERLIN, 2012, SYSTEM SIMULATION AND SCIENTIFIC COMPUTING, PT II, 327, 70 - +, English[Refereed]International conference proceedings
- Copernicus {GmbH}, 2012, Geosci. Model Dev., 5(2) (2), 449 - 455, English[Refereed]Scientific journal
- 2012, Proceedings of Inernational Conference on Simulation and Technology, JSST, EnglishConstruction of Hierarchical Models for the Fluid Dynamics in Earth and Planetary Sciences : DCMODEL project[Refereed]Scientific journal
- We report on the characteristics of tidal variations in the Martian lower atmosphere (<45 km) using the Mars Express (MEX) Planetary Fourier Spectrometer (PFS) temperature data for about three Martian years (between the ends of MY26 and MY29). The PFS data, which widely cover local time, enable us to investigate diurnal variations in the atmospheric temperature at various altitudes. We focus on diurnal variations in the atmospheric temperature and on longitudinal temperature variability in a fixed local time frame. We find that the latitudinal and diurnal variations at 0.52 mbar (similar to 25 km) during the dust-clear period (Ls = 30 degrees-60 degrees) are consistent with general characteristics presented by previous numerical simulations. The characteristics of the diurnal variations as a function of altitude in the tropics are also explained as results from the propagation of the migrating diurnal tide. The longitudinal temperature variability in the dayside (14.36-14.94 LT) equatorial regions (10 degrees S-5 degrees S) near the northern summer solstice (Ls = 76 degrees-83 degrees) in MY28 are investigated. The longitudinal temperature structure has two local maxima at 2.85 mbar (similar to 10 km) but is relatively uniform at 0.52 mbar. We find that the wave-3 structure is apparent at 0.11 mbar (similar to 40 km) in the present case. This structure would be strongly dependent on activities of the atmospheric waves, e.g., the diurnal Kelvin wave 2 (DK2). Citation: Sato, T. M., H. Fujiwara, Y. O. Takahashi, Y. Kasaba, V. Formisano, M. Giuranna, and D. Grassi (2011), Tidal variations in the Martian lower atmosphere inferred from Mars Express Planetary Fourier Spectrometer temperature data, Geophys. Res. Lett., 38, L24205, doi:10.1029/2011GL050348.AMER GEOPHYSICAL UNION, Dec. 2011, GEOPHYSICAL RESEARCH LETTERS, 38, L24205, English[Refereed]Scientific journal
- A long-term numerical simulation is performed to investigate idealized characteristics of the cloud layer of Jupiter's atmosphere using a two-dimensional cloud convection model that treats thermodynamics and microphysics of the three cloud components, H(2)O, NH(3), and NH(4)SH. A prominent result obtained is intermittent emergence of vigorous cumulonimbus clouds rising from the H(2)O condensation level to the tropopause. Due to the active transport associated with these clouds, the mean vertical distributions of cloud particles and condensible gases are distinctly different from the hitherto accepted three-layered structure; considerable amounts of H(2)O and NH(4)SH cloud particles exist above the NH(3) condensation level, while the mixing ratios of all condensible gases decrease with height from the H(2)O condensation level. The mean vertical profile of NH(3) vapor is consistent with the results of radio observations in that the abundance of NH(3) is subsolar below the NH(3) cloud base. Citation: Sugiyama, K., K. Nakajima, M. Odaka, M. Ishiwatari, K. Kuramoto, Y. Morikawa, S. Nishizawa, Y. O. Takahashi, and Y.-Y. Hayashi (2011), Intermittent cumulonimbus activity breaking the three-layer cloud structure of Jupiter, Geophys. Res. Lett., 38, L13201, doi: 10.1029/2011GL047878.AMER GEOPHYSICAL UNION, Jul. 2011, GEOPHYSICAL RESEARCH LETTERS, 38, L13201, English[Refereed]Scientific journal
- Jan. 2011, 第 11 回惑星圏研究会収録, 1,1-4, Japanese高解像度火星大気大循環モデルで見られる中小規模擾乱Scientific journal
- The horizontal spectrum of wind variance, conventionally referred to as the kinetic energy spectrum, is examined in experiments conducted with the Atmospheric GCM for the Earth Simulator (AFES) global spectral general circulation model. We find that the control version of AFES run at T639 horizontal spectral resolution simulates a kinetic energy spectrum that compares well at large scales with global observational reanalyses and, at smaller scales, with available aircraft observations at near-tropopause levels. Specifically there is a roughly -3 power-law dependence on horizontal wave number for wavelengths between about 5000 and 500 km, transitioning to a shallower mesoscale regime at smaller wavelengths. This is seen for both one-dimensional spectra and for the two-dimensional total wave number spectrum based on a spherical harmonic analysis. The simulated spectrum at midtropospheric levels is similar in that there is a transition to a shallower mesoscale regime, but the spectrum in the mesoscale is clearly steeper at midtroposphere than near the tropopause. There seem to be no extensive observations of horizontal spectra available in the midtroposphere, so it is not known whether the contrast seen in the model between upper and mid tropospheric levels is realistic. The dependence of the model simulated variability on the subgrid-scale moist convection parameterization is examined. The space-time variability of rainfall is shown to depend strongly on the convection scheme employed. The tropospheric kinetic energy spectrum in the mesoscale seems to be correlated with the precipitation behavior, so that in a version with a more variable precipitation field the kinetic energy in the mesoscale is enhanced. This suggests that the mesoscale motions in the model may be directly forced to a significant extent by the variability in the latent heating field. Experiments were also performed with a dry dynamical core version of the model run at both T639 and T1279 resolutions. This version also simulated a shallow mesoscale range, supporting the view that the mesoscale regime in the atmosphere is energized, at least in part, by a predominantly forward (i.e., downscale) nonlinear spectral cascade. Experiments with various formulations of the hyperdiffusion horizontal mixing parameterization show that the kinetic energy spectrum over about the last half of the resolved wave number range is under strong control by the parameterized mixing. However, the T1279 model simulates almost a decade of the shallow mesoscale regime (i.e., for horizontal wavelengths from about 80 to 500 km) that appears to be fairly independent of the diffusion employed. Finally, experiments are conducted in the dry version to see the effects on the kinetic energy spectrum of changing the thermal Rossby number for the simulations.AMER GEOPHYSICAL UNION, Sep. 2008, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 113(D18) (D18), English[Refereed]Scientific journal
- 日本気象学会, 2007, 天気, 54, 119-122(2) (2), 119 - 122, Japanese惑星気象学の近年の展開[Refereed]Scientific journal
- The horizontal spectrum of kinetic energy in the upper troposphere in experiments conducted with the Atmospheric GCM for the Earth Simulator (AFES) global spectral general circulation model is examined. We find that the control version of AFES run at T639 spectral resolution can simulate a realistic kinetic energy spectrum with roughly - 3 power-law dependence on horizontal wavenumber for wavelengths between about 5000 and 500 km, transitioning to a shallower mesoscale regime at smaller wavelengths. The results depend to a degree on the magnitude of the parameterized horizontal hyperdiffusion, but the existence of a distinct shallow mesoscale range in the simulations is independent of the hyperdiffusion employed. We present results from a number of AFES integrations with spectral truncations ranging from T39 to T639 and determine the appropriate scaling of the parametrized hyperdiffusion with model numerical resolution so that the kinetic energy spectrum in each case converges to realistic values. The experiment was also repeated in a dry version of the model. This version also simulated a shallow mesoscale range, supporting the view that the mesoscale regime in the atmosphere is energized, at least in part, by a predominantly downscale nonlinear spectral cascade.AMER GEOPHYSICAL UNION, Jun. 2006, GEOPHYSICAL RESEARCH LETTERS, 33(12) (12), English[Refereed]Scientific journal
- We investigate the vertical and latitudinal structure of the migrating diurnal tide in a low dust condition (dust optical depth of 0.3 at 0.67 μm) in the Martian atmosphere by using a general circulation model (GCM) and a linear response model (LRM). The migrating diurnal tide simulated in our Mars GCM well represents general characteristics of the migrating diurnal tide which have been reported in previous observational and GCM studies. The GCM simulation shows that the vertical wavelength of the migrating diurnal tide in the low latitude region at equinox is ∼45 km which is larger than that of the major propagating mode predicted from the classical tidal theory (∼25-35 km). The Hough function decomposition and the numerical experiments using the LRM reveal that the large vertical wavelength of the migrating diurnal tide is caused by the effects of the zonal mean vorticity ζ̄. It is suggested that the vertical wavelength of the migrating diurnal tide increases through the changes of the effects of the planetary rotation in the presence of non-zero zonal mean vorticity ζ̄. Such a strong dependence of the vertical wavelength of the migrating diurnal tide on ζ̄ is not observed in the Earth's atmosphere. The Martian radius, about the half of the Earth's radius, would be one of the important factors to cause more effective ζ̄ in the Martian atmosphere than that in the Earth's atmosphere. Copyright 2006 by the American Geophysical Union.Jan. 2006, Journal of Geophysical Research E: Planets, 111(1) (1), English[Refereed]Scientific journal
- An aqua planet experiment is performed to investigate the dependencies of the model representations of the equatorial precipitation activities on the horizontal and vertical resolution. The numerical model utilized is AFES, an AGCM optimized for the Earth Simulator. With the resolution of horizontal truncation at T39 and 48 vertical levels (referred to as the standard run), there appear precipitation disturbances of the scale of several grids, which are advected westward by the background wind. When the vertical resolution is increased to 96 levels from the standard run, precipitation tends to have weak intensity but be widely distributed, and the westward propagating grid-scale disturbances are rarely observed. When the horizontal resolution is increased to T319 from the standard run, a hierarchical structure appears. A large-scale eastward moving precipitation structure is superimposed on a small-scale westward moving structure.日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」, Apr. 2005, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 54(0) (0), 123 - 123
- An aqua planet experiment is performed to investigate dependence of the model representation of the equatorial precipitation activities on horizontal and vertical resolution. The numerical model utilized is AFES, an AGCM optimized for the Earth Simulator. With a resolution of horizontal truncation at T39 and 48 vertical levels (referred to as the standard run), there appear precipitation disturbances of the scale of several grids, which are advected westward by the background wind. With the increase of the vertical resolution to 96 levels from the standard run, precipitation tends to have weak intensity but be widely distributed, and the westward propagating grid-scale disturbances are rarely observed. With the increase of the horizontal resolution to T159 from the standard run, a hierarchical structure appears. A large-scale eastward moving precipitation structure is superimposed on a small-scale westward moving structure.日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」, 2005, Theor Appl Mech Jpn, 54(0) (0), 289 - 297, English
- American Geophysical Union (AGU), 2003, Journal of Geophysical Research, 108(E3) (E3), English[Refereed]Scientific journal
- 2021, 日本気象学会大会講演予稿集(CD-ROM), (120) (120)金星大気の放射計算と放射対流平衡実験
- 2021, 日本天文学会年会講演予稿集, 2021火星大気大循環の全球非静力学高解像度シミュレーションに向けて
- 2021, 地球電磁気・地球惑星圏学会総会及び講演会(Web), 150thDevelopment of a non-hydrostatic global model of the Venus atmosphere: A simplified Venus simulation
- 2021, 日本惑星科学会秋季講演会予稿集(Web), 2021全球非静力学火星大気大循環モデルの開発:地形あり計算
- 2021, 日本気象学会大会講演予稿集(CD-ROM), (120) (120)全球非静力学火星大気大循環モデルの開発:地形あり計算
- 2019, 日本天文学会年会講演予稿集, 2019大気大循環モデルを用いた系外惑星の光度曲線解析による自転軸傾斜角推定 II
- 2018, 日本惑星科学会秋季講演会予稿集(Web), 2018古火星における温室効果気体リサーチ:過酸化水素の影響
- 2018, 日本気象学会大会講演予稿集, (113) (113)火星高解像度LESを用いた地表面ダストフラックスの見積もり
- 2018, 日本地球惑星科学連合大会予稿集(Web), 2018火星大気高解像度ラージエディシミュレーションによる地表面ダストフラックスの見積もり
- 2018, 日本惑星科学会秋季講演会予稿集(Web), 2018高解像度火星境界層シミュレーションのデータを用いたダスト巻き上げ過程に関する解析
- 2018, 日本地球惑星科学連合大会予稿集(Web), 2018, ROMBUNNO.PPS04‐P01 (WEB ONLY), EnglishDevelopment of a radiative transfer model for planetary atmospheres: Application for Venus atmosphere
- 2018, 日本地球惑星科学連合大会予稿集(Web), 2018, ROMBUNNO.MGI28‐P06 (WEB ONLY), EnglishRadiative transfer calculation for various planetary atmospheres
- 31 Oct. 2017, 日本気象学会2017年度秋季大会高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造
- 30 Oct. 2017, 日本気象学会2017年度秋季大会AFES-Venusによる金星大気のモデリング
- 30 Sep. 2017, 日本気象学会大会講演予稿集, (112) (112), 209, Japanese惑星大気大循環モデルのための放射伝達モデルの構築
- 2017, 日本気象学会大会講演予稿集, (111) (111)火星大気を想定した高解像度LESで得られた地表面応力分布
- 2017, 日本気象学会大会講演予稿集, (112) (112)火星大気境界層高解像度LESによって得られた強い地表面応力の空間分布
- 2017, 日本地球惑星科学連合大会予稿集(Web), 2017高解像度LESによって得られた火星大気境界層における循環構造
- 2017, 日本惑星科学会秋季講演会予稿集(Web), 2017高解像度の火星大気ラージエディーシミュレーションで得られた地表面応力
- 30 Apr. 2016, 日本気象学会大会講演予稿集, (109) (109), 81, JapaneseLine‐by‐line放射計算による湿潤大気の2つの圏界面レジーム
- Center for Earth Information Science and Technology, Japan Agency for Marine-Earth Science and Technology, Apr. 2016, Annual report of the earth simulator, 31 - 36, JapaneseHigh Resolution General Circulation Simulation of Venus and Mars Atmosphere Using AFES
- 2016, 日本気象学会大会講演予稿集, (110) (110)SCALE-LESを用いた火星大気高解像度計算で得られた大気最下層の循環構造
- 2016, 日本地球惑星科学連合大会予稿集(Web), 2016対流が抑制される雲層における凝結物粒子の落下に伴う熱輸送
- 2016, 日本惑星科学会秋季講演会予稿集(Web), 2016高解像度ラージエディーシミュレーションで得られた火星大気最下層における対流の微細構造
- 2016, 日本地球惑星科学連合大会予稿集(Web), 2016, ROMBUNNO.MGI22‐P07 (WEB ONLY), Japanese高解像度LESによる火星ダストデビルの統計的性質
- 2016, 日本地球惑星科学連合大会予稿集(Web), 2016, ROMBUNNO.PPS11‐17 (WEB ONLY), Japanese湿潤大気に現れる対流圏界面高度の異なる二つの大気構造
- 日本気象学会, 30 Sep. 2015, 大会講演予講集, 108, 368 - 368, JapaneseC315 簡易金星版AFES高解像度計算における運動エネルギーの波数間収支(「あかつき」金星大気探査カウントダウン,スペシャル・セッション)
- 日本気象学会, 30 Apr. 2015, 日本気象学会大会講演予稿集, 107(107) (107), 323 - 323, Japanese水蒸気大気の圏界面の推定とハビタブルゾーンの内側境界
- Center for Earth Information Science and Technology, Japan Agency for Marine-Earth Science and Technology, Apr. 2015, Annual report of the earth simulator, 31 - 38, EnglishSimulations of Atmospheric General Circulations of Earth-like Planets by AFES
- 日本惑星科学会, Mar. 2015, Planetary People, 24(1) (1), 75 - 77, JapaneseReport of Workshop on Mars Science
- 2015, 日本惑星科学会秋季講演会予稿集(Web), 2015放射対流平衡モデルによる水蒸気大気の圏界面温度の推定
- 2015, 日本地球惑星科学連合大会予稿集(Web), 2015火星探査のための表層環境評価:雲解像モデルCReSSの火星大気への適用
- 2015, 日本惑星科学会秋季講演会予稿集(Web), 2015木星大気放射冷却に対する雲対流の寄与
- 日本気象学会, 2015, 大会講演予講集, 107, 270 - 270, JapaneseP239 惑星大気大循環モデルの構築 : 鉛直一次元設定での数値実験(ポスターセッション)
- 日本気象学会, 2015, 大会講演予講集, 107, 269 - 269, JapaneseP238 雲解像モデルCReSSの火星大気への適用 : 地形と大規模循環の効果の導入(ポスターセッション)
- 2015, 地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM), 138th, ROMBUNNO.R009‐26, Japanese火星衛星サンプルリターン機による火星大気観測の可能性
- 2015, 日本地球惑星科学連合大会予稿集(Web), 2015, ROMBUNNO.PPS01‐02 (WEB ONLY), EnglishThe radiative cooling and the solar heating in Jovian troposphere
- 2015, 日本地球惑星科学連合大会予稿集(Web), 2015, ROMBUNNO.PPS21‐27 (WEB ONLY), Japanese水蒸気大気の圏界面の推定とハビタブルゾーンの内側境界
- 社団法人日本気象学会, 30 Sep. 2014, 大会講演予講集, 106, 145 - 145, JapaneseB168 系外惑星大気の3次元計算のための放射モデル開発(惑星大気科学の現在,スペシャル・セッション)
- 社団法人日本気象学会, 30 Sep. 2014, 大会講演予講集, 106, 135 - 135, JapaneseB158 火星ダスト巻き上げスキームのDCPAMへの実装及び地表面ダストフラックス診断実験(惑星大気科学の現在,スペシャル・セッション)
- 社団法人日本気象学会, 30 Sep. 2014, 大会講演予講集, 106, 137 - 137, JapaneseB160 初期火星大気中の主成分凝結対流の二次元数値実験 : 雲分布の凝結核数混合比に対する依存性(惑星大気科学の現在,スペシャル・セッション)
- 社団法人日本気象学会, 30 Sep. 2014, 大会講演予講集, 106, 144 - 144, JapaneseB167 同期回転惑星の大気循環における雲の効果に関する数値実験(惑星大気科学の現在,スペシャル・セッション)
- 日本惑星科学会, 10 Sep. 2014, 日本惑星科学会秋期講演会予稿集, 2014, "O1 - 04", JapaneseO1-04 大気大循環モデルのための放射モデル開発 : 同期回転惑星大気(口頭発表セッション1 惑星大気,口頭発表)
- 日本惑星科学会, 10 Sep. 2014, 日本惑星科学会秋期講演会予稿集, 2014, "O1 - 03", JapaneseO1-03 火星ダスト巻き上げスキームの大気大循環モデルDCPAMへの実装及びダスト巻き上げフラックス診断実験(口頭発表セッション1 惑星大気,口頭発表)
- 日本惑星科学会, 10 Sep. 2014, 日本惑星科学会秋期講演会予稿集, 2014, "O2 - 05", JapaneseO2-05 巨大ガス惑星の雲層構造と放射冷却過程(口頭発表セッション2 系外惑星,口頭発表)
- 日本惑星科学会, 10 Sep. 2014, 日本惑星科学会秋期講演会予稿集, 2014, "O1 - 05", JapaneseO1-05 同期回転惑星大気の数値実験 : 昼夜間熱輸送に関する検討(口頭発表セッション1 惑星大気,口頭発表)
- 日本惑星科学会, 10 Sep. 2014, 日本惑星科学会秋期講演会予稿集, 2014, "O1 - 06", JapaneseO1-06 初期火星大気中の主成分凝結対流の二次元数値実験 : 雲分布の凝結核数混合比に対する依存性(口頭発表セッション1 惑星大気,口頭発表)
- 数値気象モデルを用いた着陸探査のための火星表層環境評価—Assessment of Mars surface environment for landing exploration mission by using numerical meteorological models第47回月・惑星シンポジウム (2014年8月4日-6日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県 47th ISAS Lunar and Planetary Symposium (August 4-6, 2014. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan 形態: カラー図版あり 資料番号: SA6000033005宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS), Aug. 2014, 第47回月・惑星シンポジウム = Proceedings of the 47th ISAS Lunar and Planetary Symposium, Japanese
- 日本気象学会, 30 Apr. 2014, 大会講演予講集, 105, 432 - 432, JapaneseD451 簡易金星版AFES高解像度計算のエネルギースペクトル(大気力学,一般口頭発表)
- The Japanese Society for Planetary Sciences, Mar. 2014, Planetary People, 23(1) (1), 61 - 63, JapaneseSymposium for a small scale planetary exploration using the epsilon rocket
- The Japanese Society for Planetary Sciences, Mar. 2014, Planetary People, 23(1) (1), 64 - 69, JapaneseSymposium on Computational Planetary Science
- Researches on planetary atmospheres using numerical models and GFD-Dennou Club DCMODEL projectSpace missions for planetary atmospheres and numerical simulations are fundamental components for researches on planetary atmospheres. Recently, numerical simulation models become essential to planning of missions, analyzing and providing observational data. On the other hand, the simulation models used in these researches have become so expanded and complicated that it is dif.cult for one researcher to understand, develop, maintain and provide their source codes. "Model gap problem"is one of the dif.culties with numerical simulation models. In order to check the validity of the simulation models and to develop them further, it is necessary to perform numerical calculations with numerical models with various complexities and to compare the numerical results mutually. Expansion of the simulation models makes dif.cult to perform such inter-comparison for checking of the validity. In an attempt to overcome the "model gap problem", we have been proceeding"dcmodel project", where a series of hierarchical numerical models with various complexity is developed and maintained as a voluntary activity. The numerical models are developed with the following intentions: 1) Hierarchical models with various complexities. 2) Common"style" of programming in order to ensure readability. 3) Open source codes to the public. 4) Scalability of the models in order to ensure execution on various platforms. 5) Stressing the importance of documentation and presenting a method for producing reference manuals. The series of hierarchical models enable us to conduct multiple numerical experiments with multiple models easily, which will lead to a deeper understanding of various phenomena in planetary atmospheres.Japan Aerospace Exploration Agency, Mar. 2014, JAXA research and development report, 13, 147 - 153, Japanese
- 2014, 宇宙科学技術連合講演会講演集(CD-ROM), 58th火星着陸探査機のための火星環境評価
- 日本気象学会, 2014, 大会講演予講集, 105, 321 - 321, JapaneseP345 惑星大気大循環モデルDCPAMを用いたMELOS1探査機のための火星表層環境評価(ポスターセッション)
- 日本気象学会, 2014, 大会講演予講集, 106, 138 - 138, JapaneseB161 着陸機による探査のための火星表層環境評価(惑星大気科学の現在,スペシャル・セッション)
- 日本気象学会, 2014, 大会講演予講集, 106, 139 - 139, JapaneseB162 雲解像モデルCReSSの火星大気への適用 : 混合長の取り扱い(惑星大気科学の現在,スペシャル・セッション)
- 2014, 細氷(Web), (60) (60), 30-31 (WEB ONLY), Japanese系外惑星気候の多様性の探索:雲の存在を考慮した同期回転惑星大気の数値実験
- 日本惑星科学会, 20 Nov. 2013, 日本惑星科学会秋期講演会予稿集, 2013, "O13 - 01", JapaneseO13-01 大気大循環モデルを用いた木星型惑星大気の数値実験(口頭発表セッション13(惑星大気),口頭発表)
- 日本惑星科学会, 20 Nov. 2013, 日本惑星科学会秋期講演会予稿集, 2013, "P3 - 29", JapaneseP3-29 CReSSを用いた火星気象予測実験(ポスターセッション3,ポスター発表)
- 日本惑星科学会, 20 Nov. 2013, 日本惑星科学会秋期講演会予稿集, 2013, "O13 - 03", JapaneseO13-03 同期回転惑星大気の数値実験 : 非灰色放射スキームと雲スキームを用いた場合(口頭発表セッション13(惑星大気),口頭発表)
- 社団法人日本気象学会, 31 Oct. 2013, 大会講演予講集, 104, 95 - 95, JapaneseD102 雲の存在を考慮した同期回転惑星大気の数値実験(大気力学,口頭発表)
- 日本気象学会, 30 Apr. 2013, 大会講演予講集, 103, 208 - 208, JapaneseD201 惑星大気大循環モデルDCPAMのセミラグランジュ法物質移流スキーム : 変則エルミート5次補間とarcsine非負フィルタ(物質循環I,口頭発表)
- 社団法人日本気象学会, 30 Apr. 2013, 大会講演予講集, 103, 376 - 376, JapaneseD411 木星大気の雲対流の直接数値計算:雲対流の間欠性に関する考察(大気力学,口頭発表)
- Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, Apr. 2013, Annual report of the Earth Simulator Center, 31 - 37, EnglishSimulations of Atmospheric General Circulations of Earth-like Planets by AFES
- 日本気象学会, 2013, 大会講演予講集, 104, 94 - 94, JapaneseD101 大気大循環モデルを用いた木星型惑星大気の数値実験(大気力学,口頭発表)
- 日本気象学会, 2013, 大会講演予講集, 104, 61 - 61, JapaneseA117 DCPAMを用いた惑星熱収支の自転角速度依存性に関する研究(気候システムI,口頭発表)
- 日本気象学会, 2013, 大会講演予講集, 104, 200 - 200, JapaneseP116 CReSSを用いた火星気象予測実験(ポスター・セッション)
- Circulations of atmosphere of synchronously rotating planets, which have perpetual dayside and nightside, are investigated by using a general circulation model with simplified hydrological processes.Results of experiments with various planetary rotation rate and solar constant show that the upper limit of solar constant with which equilibrium states are maintained is almost independent of rotation rate. The upper limit is determined by the radiation limit.In cases where equilibrium states are obtained, the amount of day-night energy transport is independent of rotation rate and determined by the difference between dayside mean insolation flux and radiation limit, although circulation changes.National Committee for IUTAM, 2013, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 62(0) (0), Japanese
- Nov. 2012, NCAR Technical Note, NCAR/TN-484+STR, EnglishTHE APE ATLAS[Refereed]Others
- 日本惑星科学会, 24 Oct. 2012, 日本惑星科学会秋期講演会予稿集, 2012, 39 - 39, JapaneseO4-03 火星境界層乱流のLES実験(口頭発表セッション4(惑星大気,衝突科学I),口頭発表)
- 社団法人日本気象学会, 30 Sep. 2012, 大会講演予講集, 102, 141 - 141, JapaneseC160 惑星大気大循環モデルdcpamを用いた金星設定における放射強制変更実験(スペシャル・セッション「惑星大気科学の課題と将来の探査計画」,口頭発表)
- 社団法人日本気象学会, 30 Sep. 2012, 大会講演予講集, 102, 144 - 144, JapaneseC163 AFESを用いた金星大気の傾圧不安定に関する研究(スペシャル・セッション「惑星大気科学の課題と将来の探査計画」,口頭発表)
- 社団法人日本気象学会, 30 Sep. 2012, 大会講演予講集, 102, 137 - 137, JapaneseC156 火星境界層乱流のLES実験(スペシャル・セッション「惑星大気科学の課題と将来の探査計画」,口頭発表)
- A report on a conference discussing the future of the Japanese Community for Planetary Sciences2012年7月24日,神戸大学惑星科学研究センター内の講義室にて「惑星科学の今後を考える会」なる催しが開かれた.本稿はその会議の参加記録であり,紹介である. 1992年に惑星科学会が発足して以来20年の歳月が流れた.その間,惑星探査,大型望遠鏡観測,大規模シミュレーション科学等の大型プロジェクトに関わる研究者も増え,拠点と呼ばれる組織も生まれてきた.本会では惑星科学コミュニティにおけるそうした拠点組織の持つ役割と課題を整理し,現状認識を深め,大型プロジェクト研究を推進できる力を持つコミュニティの今後のあり方について議論した.日本惑星科学会, 25 Sep. 2012, Planetary People, 21(3) (3), 324 - 329, JapaneseMeeting report
- 社団法人日本気象学会, 30 Apr. 2012, 大会講演予講集, 101, 309 - 309, JapaneseB310 火星極冠上空を想定した主成分凝結対流の二次元数値実験(降水システムII,一般口頭発表)
- 光の透過性の問題で,木星雲層の大気構造の観測は断片的・間接的にならざるを得ず,その構造は未だよくわかっていない.1970年代に,鉛直1次元の平衡雲凝結モデルによって大気構造が理論的に調べられ,組成の異なる3成分の雲が別々の高度に分かれて存在するという描像が作られた.この描像は,一般的に受け入れられているが,大気の運動や降水等の雲微物理過程によって変化するはずである.筆者らはH_2OとNH_3の凝結とNH_4SHの生成反応を考慮した雲解像モデルを開発し,多数の雲の生成消滅が繰り返された結果として決まる大気構造を調べてきた.本稿ではこれまでの木星雲層の大気構造の認識を概観しつつ,筆者らの最近の研究結果を紹介する.日本惑星科学会, 25 Mar. 2012, Planetary People, 21(1) (1), 39 - 44, Japanese
- 2012, 日本気象学会大会講演予稿集, (102) (102)火星境界層乱流のLES実験
- 社団法人日本気象学会, 31 Oct. 2011, 大会講演予講集, 100, 290 - 290, JapaneseD111 惑星大気計算のための大循環モデルならびに雲解像モデルの構築(大気力学,一般口頭発表)
- 社団法人日本気象学会, 31 Oct. 2011, 大会講演予講集, 100, 292 - 292, JapaneseD113 同期回転惑星大気における熱収支の自転角速度依存性(大気力学,一般口頭発表)
- 日本惑星科学会, 23 Oct. 2011, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2011(0) (0), 101 - 101, JapaneseSP2-03P Supporting activities of CPS (Center for Planetary Science) for organizers of schools, training courses, and workshops
- 日本惑星科学会, 23 Oct. 2011, 日本惑星科学会秋期講演会予稿集, 2011, 75 - 75, JapaneseS32-05 同期回転惑星大気における熱収支の自転角速度依存性(口頭セッション32:惑星環境進化,口頭発表)
- 日本惑星科学会, 23 Oct. 2011, 日本惑星科学会秋期講演会予稿集, 2011, 76 - 76, JapaneseS32-06 共通のプログラムスタイルを持つ大気大循環モデルと雲解像モデルの開発(口頭セッション32:惑星環境進化,口頭発表)
- 社団法人日本気象学会, 30 Apr. 2011, 大会講演予講集, 99, 223 - 223, JapaneseD104 主成分凝結を伴う2次元大気対流の準平衡状態(惑星大気,一般口頭発表)
- 社団法人日本気象学会, 30 Apr. 2011, 大会講演予講集, 99, 225 - 225, JapaneseD106 同期回転惑星における暴走限界の自転角速度・日射分布依存性(惑星大気,一般口頭発表)
- 日本気象学会, 2011, 大会講演予講集, 99, 222 - 222, JapaneseD103 高解像度火星大気大循環モデルで表現される小規模擾乱によるダスト巻き上げ過程への影響(惑星大気,一般口頭発表)
- 社団法人日本気象学会, 2011, 大会講演予講集, 99(0) (0), 220 - 220, JapaneseD101 MELOS火星着陸機の気象観測測器の検討(惑星大気,一般口頭発表)
- 日本惑星科学会, 06 Oct. 2010, 日本惑星科学会秋期講演会予稿集, 2010, 21 - 21, Japanese121 同期回転惑星における太陽定数増大実験(オーラルセッション3 内惑星・ハビタブルプラネット)
- 社団法人日本気象学会, 30 Sep. 2010, 大会講演予講集, 98, 319 - 319, JapaneseD311 同期回転惑星における太陽定数増大実験(大気力学,口頭発表)
- 社団法人日本気象学会, 30 Apr. 2010, 大会講演予講集, 97, 209 - 209, JapaneseD405 同期回転惑星の大気大循環とその自転角速度依存性(大気力学,一般口頭発表)
- 社団法人日本気象学会, 31 Oct. 2009, 大会講演予講集, 96, 229 - 229, JapaneseC307 大気大循環モデルを用いた陸と海のある惑星の大気大循環計算(スペシャル・セッション「惑星大気の多様性」)
- 社団法人日本気象学会, 31 Oct. 2009, 大会講演予講集, 96, 230 - 230, JapaneseC308 系外惑星の気候探索をめざした数値モデルの開発(スペシャル・セッション「惑星大気の多様性」)
- 日本惑星科学会, 28 Sep. 2009, 日本惑星科学会秋期講演会予稿集, 2009, 60 - 60, Japanese309 惑星大気雲対流モデルの開発(オーラルセッション10 惑星気象・惑星大気)
- Exploring the Martian meteorology and hydrology(Definition of Science Objectives for MELOS Mars Exploration)火星表層の水循環や気象学の理解を目的とする火星周回衛星の検討を進めている.可視〜赤外域での高解像度の分光撮像による水蒸気マッピングと大気力学場モニター,そしてサブミリ波サウンダーによる水蒸気やその他微量ガスの3次元分布の観測が,二つの柱である.着陸機による局地気象の直接観測や大気電気観測との連携についても検討中である.The Japanese Society for Planetary Sciences, 25 Jun. 2009, Planetary People, 18(2) (2), 76 - 78, Japanese
- 社団法人日本気象学会, 30 Apr. 2009, 大会講演予講集, 95, 73 - 73, JapaneseA402 階層的数値モデルのためのデータ入出力ライブラリGtoo15の設計と開発(大気力学・中高緯度大気)
- 2009, 大気圏シンポジウム・講演集(Web), 23rd火星気象と水循環
- 2009, 地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM), 126th惑星大気における雲対流の数値モデリング
- 2009, 大気圏シンポジウム・講演集(Web), 23rd, V-5 (WEB ONLY), Japanese同期回転惑星大気における循環構造
- 日本惑星科学会, 01 Nov. 2008, 日本惑星科学会秋期講演会予稿集, 2008, 7 - 7, Japanese107 同期回転惑星大気における循環構造(惑星の形成および惑星大気,オーラルセッション1)
- 社団法人日本気象学会, 31 Oct. 2008, 大会講演予講集, 94, 325 - 325, JapaneseD304 可変性と可読性を考慮した大気大循環モデルの開発 : ソースコードの簡潔さを重視したモデル設計(スペシャル・セッション「惑星大気の新しい観測と理論」)
- 2008, 地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM), 124th日本の次期火星探査計画:気象オービター
- Dust lifting process represented by a high resolution Mars general circulation modelIn order to investigate the effects of small and medium scale atmospheric circulation and disturbances on dust lifting process on Mars, the high resolution simulations of the Martian atmosphere are performed by using a Mars general circulation model. The simulations with horizontal resolutions of 89, 44, and 22km show that the dust lifting amount increases with increasing resolution. The increase of dust lifting amount is mainly caused by the lifting around several regions with characteristic orographic features, such as the Valles Marineris and the Hellas basin. The analysis of dust lifting phenomena in the Valles Marineris region shows that the superposition of local slope wind and the return flow of meridional circulation causes the large dust lifting in the region. This implies that the effects of small and medium scale local orographic circulation play an important role in lifting dust on Mars.日本流体力学会, 2008, 日本流体力学会年会講演論文集, 2008, 379 - 379, Japanese
- 日本気象学会, 2008, 大会講演予講集, 93, 271 - 271, JapaneseD202 火星大気大循環モデルで表現されるダスト巻き上げ量の解像度依存性(大気力学II)
- 社団法人日本気象学会, 30 Sep. 2007, 大会講演予講集, 92, 166 - 166, JapaneseB305 可変性と可読性を考慮した大気大循環モデルの開発と湿潤惑星の数値実験(スペシャルセッション「さまざまな対流」)
- 社団法人日本気象学会, 30 Sep. 2007, 大会講演予講集, 92, 167 - 167, JapaneseB306 同期回転惑星の大気大循環の数値計算(スペシャルセッション「さまざまな対流」)
- A numerical experiment of a moist planet with a general circulation modelAiming for constructing an atmospheric general circulation model (GCM) with high readability and flexibility, desired program structures have been considered and their implementation tests have been performed. A flexible GCM whose programs can be easily changed is useful for investigating the structures of various planetary atmospheres from the viewpoint of comparative planetary science. In order to consider moist atmospheric circulations such as Earth and Jupiter, we have performed following attempts for facilitating exchanges of physical processes; (1) a design of physical process modules, (2) a development of a library for the production of test programs, (3) an improvement of document auto-generation library RDoc.Japan Society of Fluid Mechanics, 06 Aug. 2007, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2007, 246 - 246, Japanese
- 2007, 地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM), 122nd2次元対流モデルで明らかにされた木星大気の雲対流構造
- 日本気象学会, 2007, 大会講演予講集, 91, 202 - 202, JapaneseD204 火星大気大循環モデルで見られた日変化する小規模渦(大気力学)
- 日本気象学会, 2007, 大会講演予講集, 92, 164 - 164, JapaneseB303 火星大気子午面循環の季節変化(スペシャルセッション「さまざまな対流」)
- For the purpose of performing comprehensive numerical experiments on various moist atmospheres including terrestrial and Jovian atmospheres, an atmospheric general circulation model flexible in changing program codes is designed and implemented. It is often necessary to exchange numerical schemes of indeterminate physical processes such as cumulus process. In order to facilitate those exchanges, (1) a general design for physical process modules with initializing routines is presented, (2) a standard procedure for testing each physical process is presented and a common library for constructing test programs is developed.THE JAPANESE SOCIETY FOR PLANETARY SCIENCES, 2007, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007(0) (0), 93 - 93
- Extrasolar planets near stars is considered to rotatesynchronously due to strong tidal force. On a synchronously rotating planet, one side is permanentlyilluminated while the other side is in perpetual darkness. Joshi et al. (1997) performs an atmospheric GCM simulation on a synchronouslyrotating planet, but their model does not contain hydrologic processes. In this study, a GCM experiment is performed fora moist atmosphere on a synchronously rotating planet, and atmospheric circulation and heat transport are examined. The results indicate thatlongitudinal heat transport in the low latitudinal region is caused by propagation of equatorial Kelvin and Rossby waves,and that in the higher latitudinal regionis caused by baroclinic eddies.THE JAPANESE SOCIETY FOR PLANETARY SCIENCES, 2007, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007(0) (0), 95 - 95
- 社団法人日本気象学会, 30 Apr. 2006, 大会講演予講集, 89, 204 - 204, JapaneseC410 大気大循環モデルで表現される赤道域降水活動の循環構造解析 : 背景風移流と赤道波に着目して(熱帯大気)
- 日本気象学会, 2006, 大会講演予講集, 90, 85 - 85, JapaneseA362 火星大気大循環モデルで用いるCO_2 15μm帯放射モデルの再構築と循環への影響(スペシャルセッション「惑星大気の科学」II)
- 日本気象学会, 2006, 大会講演予講集, 89, 243 - 243, JapaneseD406 火星大気大循環モデルで表現される中小規模擾乱の構造(大気力学II)
- Development of a general circulation model for planetary atmospheres: the GFD Dennou Club DCPAMAiming for an atmospheric general circulation model (GCM) with a flexible and readable source code, a dynamical core is newly designed and its implementation tests are performed. In order to improve the flexibility and readability of the model, the source code is hierarchically structured by the use of modules and derived-type variables, array-valued functions are frequently used for operating array-valued variables, a set of naming rules are newly introduced for variables and functions, and a tool set for automatic generation of reference document (RDoc) are improved. The dynamical core developed here is named DCPAM, and is provided at http://www.gfd-dennou.org/ .THE JAPANESE SOCIETY FOR PLANETARY SCIENCES, 2006, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2006(0) (0), 68 - 68
- 社団法人日本気象学会, 31 Oct. 2005, 大会講演予講集, 88, 320 - 320, JapaneseP123 火星大気湿潤対流のための非静力学モデルの定式化
- 社団法人日本気象学会, 31 Oct. 2005, 大会講演予講集, 88, 481 - 481, JapaneseP388 ソフトウェアとしての可読性を重視した全球プリミティブモデル
- AM05-13-013 Design and implementation tests of a dynamical core for a general circulation model with a flexible and readable source codeAiming for an atmospheric general circulation model (GCM) with readability and flexibility, a dynamical core is newly designed and implemented. Readability and flexibility are expected to be increased by the use of advantageous features of Fortran 90 and by proposing a programming style. The programming style is to help us imagine the corresponding equations of the original physical system. The implemented dynamical core is examined by the benchmark test for GCM dynamical core proposed by Held and Suarez (1994). According to the results of 1200 day integration with the horizontal resolutions of T21, T42, and T63, it is confirmed that the Hadley circulation and mid-latitudinal disturbances are well expressed.Japan Society of Fluid Mechanics, 05 Sep. 2005, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2005, 268 - 268, Japanese
- 社団法人日本気象学会, 30 Apr. 2005, 大会講演予講集, 87, 152 - 152, JapaneseC104 大気大循環モデルで表現される赤道域降水活動の解像度依存性(熱帯大気I)
- AM05-13-012 A Resolution Dependence of Equatorial Precipitation Activities Represented in a General Circulation ModelAqua planet experiments are performed in order to investigate horizontal and vertical resolution dependencies of equatorial precipitation activities. The numerical model utilized is AGCM for Earth Simulator (AFES). The cumulus convective scheme is not used. With the increase of vertical resolution from 24 to 96 levels, there are not major differences in precipitation pattern. With the increase of horizontal resolution from T39 to T319, the eastward propagating envelope structures of the westward propagating individual grid-scale disturbances become evident.日本流体力学会, 2005, 日本流体力学会年会講演論文集, 2005, 267 - 267, Japanese
- 日本気象学会, 2005, 大会講演予講集, 88, 277 - 277, JapaneseD309 火星大気大循環モデルで表現されるダスト巻き上げと輸送(大気力学I)
- Formulation of a non-hydrostatic model for moist convection associated with condensation of major atmospheric component in the Martian atmosphere is examined. When the supersaturation of carbon dioxide is small or the time scal of condensation is longer than that of sound wave, a modified quasi-compressible system in which a mass source term associated with condensation is introduced in the continuity equation can be adapted for the Martian atmospheric moist convection. We develop a 2D non-hydrostatic model based on the formulation of modified quasi-compressible system and investigate flow patterns associated with the Martian atmospheric moist convection with steady thermal forcing.THE JAPANESE SOCIETY FOR PLANETARY SCIENCES, 2005, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2005(0) (0), 93 - 93
- 日本天文学会, 20 Dec. 2004, The Astronomical herald, 98(1) (1), 37 - 47, JapaneseDust Storm in the Martian Atmosphere
- 社団法人日本気象学会, Oct. 2004, 大会講演予講集, 86, 259 - 259, JapaneseC302 大気大循環モデルで表現される赤道域降水活動の解像度依存性(熱帯大気I)
- The Japanese Society for Planetary Sciences, 25 Sep. 2004, Planetary people, 13(3) (3), 145 - 155, JapaneseSimulations of the Martian climate by the use of general circulation models : their current status and the problems of manipulating dust
- A313 A Resolution Dependency of Equatorial Precipitation Activities Represented in a General Circulation ModelAqua planet experiments are performed in order to investigate horizontal and vertical resolution dependencies of equatorial precipitation activities. The numerical model utilized is AGCM for Earth Simulator (AFES). With the increased vertical resolution from 24 to 96 levels, weak precipitation intensity tends to be widely distributed, and the westward propagating grid-scale disturbances become obscured. With the increased horizontal resolution from T39 to T319, the eastward propagating envelope structures of the westward propagating individual grid-scale disturbances become evident.Japan Society of Fluid Mechanics, 09 Aug. 2004, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2004, 490 - 491, Japanese
- 日本気象学会, 2004, 大会講演予講集, 86, 298 - 298, JapaneseD105 水惑星実験における時間・帯状平均量のモデル解像度依存性(大気力学)
- 日本気象学会, 2004, 大会講演予講集, 85, 164 - 164, JapaneseC465 亜熱帯ジェットと中緯度SST勾配がストームトラック活動に与える影響(ストームトラックの力学,専門分科会)
- 日本気象学会, 15 Oct. 2003, 大会講演予講集, 84, 59 - 59, JapaneseA208 大気大循環モデル中での対流性降雨とグリッド凝結降雨の比の積雲対流パラメタリゼーションと解像度に対する感度(気象予報)
- 日本気象学会, 2003, 大会講演予講集, 84, 353 - 353, JapaneseP144 超高解像度大気大循環シミュレーションから得られた水平波数スペクトル
- 日本気象学会, 2003, 大会講演予講集, 83, 91 - 91, JapaneseB152 大気大循環モデルを用いた火星大気大循環の数値計算(力学を介しての横断的理解)
- The Japanese Society for Planetary Sciences, 25 Jun. 2001, Planetary people, 10(2) (2), 56 - 63, JapaneseEffect of Topography on Meridional Circulation in the Martian
- 24 May 2000, 大会講演予講集, 77, 253 - 253, Japanese火星大気大循環の計算機シミュレーション : 子午面循環における地形の影響
- 日本気象学会 2023 年度秋季大会, Oct. 2023, Japanese金星大気放射対流平衡の 熱力学モデル依存性Oral presentation
- 日本気象学会 2021 年度秋季大会, Dec. 2021, Japanese金星大気の放射計算と放射対流平衡実験
- 日本惑星科学会2020年秋季講演会, Nov. 2020, Japanese全球非静力学火星大気大循環モデルによる鉛直対流とダスト巻き上げ輸送の計算Oral presentation
- JpGU-AGU Joint Meeting 2020: Virtual, Jul. 2020, Japanese全球非静力学火星大気大循環モデルによるダスト巻き上げ輸送計算Oral presentation
- JpGU-AGU Joint Meeting 2020: Virtual, Japanese1.5層浅水系における加熱冷却が生成する赤道スーパーローテーションOral presentation
- 第21回非静力学モデルに関するワークショップ, Nov. 2019, Japanese非静力学全球大気モデルにおけるQBO的周期振動の時間刻み幅依存性
- 日本気象学会2019年度秋季大会, Oct. 2019, Japanese乾燥大気理想化実験におけるQBO的周期振動のモデル依存性(続報)Oral presentation
- 第146回地球電磁気・地球惑星圏学会 総会および講演会, Oct. 2019, Japanese非静力学全球火星大気循環モデルの開発と高解像度計算Oral presentation
- 日本惑星科学会2019年秋季講演会, Oct. 2019, Japanese非静力学全球火星大気循環モデルの開発と高解像度計算
- 日本流体力学会 年会2019, Sep. 2019, Japanese高解像度金星大気シミュレーションで再現された惑星規模筋状構造Oral presentation
- 日本流体力学会 年会2019, Sep. 2019, Japanese非静力学全球火星大気循環モデルの開発と高解像度計算Oral presentation
- 公開シンポジウム「京」から「富岳」へ:大規模シミュレーションが拓く惑星科学の未来, Sep. 2019, Japanese火星大気の全球高解像度シミュレーションに向けたモデル開発Oral presentation
- Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conferenceRadiative transfer calculation for various planetary atmospheres:Application to a general circulation modelPoster presentation
- 日本気象学会2019年度春季大会, May 2019, Japanese, 国立オリンピック記念青少年総合センター, Domestic conference全球非静力学火星大気大循環モデルの開発と高解像度計算Oral presentation
- Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conferenceDevelopment of a global non-hydrostatic Martian atmospheric modeland its high-resolution simulationOral presentation
- Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conferenceA study on the dependence of ocean planet climate on solar constant:influence of oceanic heat transport in the case of large absorptioncoefficients of gray atmosphereOral presentation
- Japan Geoscience Union Meeting 2019, May 2019, English, Makuhari Messe, Chiba, International conferenceZonal mean structure of Venus atmosphere observed in a Venus general circulation model with explicit radiative transferPoster presentation
- International Venus Conference 2019 (The 74th Fujihara Seminar: "Akatsuki" Novel Development of Venus Science), May 2019, English, Hilton Niseko Village, International conferenceZonal mean structure of Venus atmosphere observed in a Venus general circulation model, DCPAM, with explicit radiative transfer calculationPoster presentation
- International Venus Conference 2019 (The 74th Fujihara Seminar: "Akatsuki" Novel Development of Venus Science), May 2019, English, Hilton Niseko Village, International conferencePlanetary-scale streak structure reproduced in high-resolution simulations of the Venus atmosphere with a low-stability layerOral presentation
- ポスト「京」萌芽的課題・計算惑星 第3回 公開シンポジウム, Mar. 2019, Japanese, Domestic conference火星大気循環の全球非静力学モデルの開発と高解像度計算Oral presentation
- 日本気象学会2018年度秋季大会, Oct. 2018, Japanese, 仙台国際センター, Domestic conference放射伝達を陽に計算した金星大気大循環計算Oral presentation
- 日本惑星科学会2018年秋季講演会, Oct. 2018, Japanese, 旭川市科学館サイパル, Domestic conference地球化改造した火星の気候シミュレーションPoster presentation
- 日本気象学会2018年度秋季大会, Oct. 2018, Japanese, 仙台国際センター, Domestic conference高解像度火星大気大循環モデル中の中小規模渦度擾乱Oral presentation
- 日本惑星科学会2018年秋季講演会, Oct. 2018, Japanese, 旭川市科学館サイパル, Domestic conference高解像度火星境界層シミュレーションのデータを用いたダスト巻き上げ過程に関する解析Poster presentation
- 日本惑星科学会2018年秋季講演会, Oct. 2018, Japanese, 旭川市科学館サイパル, Domestic conference古火星における温室効果気体リサーチ:過酸化水素の影響Poster presentation
- Comparative Climatology III, Aug. 2018, English, Lunar and Planetary Institute, Houston, Texas, International conferenceGCM Experiments on Occurrence Condition of the Runaway Greenhouse State: Aquaplanets and Landplanets.Oral presentation
- 日本気象学会2018年度春季大会, May 2018, Japanese, つくば国際会議場, Domestic conference惑星大気放射伝達モデルの構築:金星大気の計算Oral presentation
- 日本地球惑星科学連合2018年大会, May 2018, Japanese, 幕張メッセ, Domestic conference惑星大気の放射伝達計算Poster presentation
- 日本気象学会2018年度春季大会, May 2018, Japanese, つくば国際会議場, Domestic conference部分凍結解の初期値依存性を除去した海惑星気候の太陽定数依存性Oral presentation
- 日本地球惑星科学連合2018年大会, May 2018, Japanese, 幕張メッセ, Domestic conference大気大循環モデルを用いた地球気候の太陽定数依存性に関する数値実験Oral presentation
- 日本地球惑星科学連合2018年大会, May 2018, Japanese, 幕張メッセ, Domestic conference海惑星気候の太陽定数依存性に関する数値的研究: 海洋熱容量と海洋熱輸送の効果Oral presentation
- 日本地球惑星科学連合2018年大会, May 2018, Japanese, 幕張メッセ, Domestic conference火星大気循環の全球・高解像度・非静力学計算に向けたモデル開発Poster presentation
- 日本地球惑星科学連合2018年大会, May 2018, Japanese, 幕張メッセ, Domestic conference火星大気高解像度ラージエディシミュレーションによる地表面ダストフラックスの見積もりPoster presentation
- 日本気象学会 2018 年度春季大会, May 2018, Japanese, つくば国際会議場, Domestic conference火星高解像度 LES を用いた地表面タストフラックスの見積もりOral presentation
- Japan Geoscience Union Meeting 2018, May 2018, English, Makuhari Messe, Chiba, International conferenceDevelopment of a radiative transfer model for planetary atmospheres: Application for Venus atmospherePoster presentation
- ポスト「京」萌芽的課題・計算惑星 第2回 公開シンポジウム, Mar. 2018, Japanese, 神戸大学 統合研究拠点, Domestic conference火星版SCALE-GMの開発:高解像度非静力学火星大気シミュレーションに向けてOral presentation
- Fundamental Aspects of Geophysical Turbulence III, Mar. 2018, English, 名古屋大学, International conferenceNumerical study on small scale vortices in Mars's lower atmosphere[Invited]Invited oral presentation
- Fundamental Aspects of Geophysical Turbulence III, Mar. 2018, English, 名古屋大学, International conferenceDisturbances and energy spectra in a high-resolution global model of the Venus atmosphere[Invited]Invited oral presentation
- 日本気象学会2017年度秋季大会, Oct. 2017, Japanese, 北海道大学 学術交流会館, Domestic conference惑星大気大循環モデルのための放射伝達モデルの構築Oral presentation
- 地球電磁気・地球惑星圏学会第142 回総会・講演会, Oct. 2017, Japanese, 京都大学 宇治キャンパス, Domestic conference大気大循環モデルを用いた地球気候の太陽定数依存性に関する数値実験Poster presentation
- 地球電磁気・地球惑星圏学会第142 回総会・講演会, Oct. 2017, Japanese, 京都大学 宇治キャンパス, Domestic conference全球海惑星気候の太陽定数依存性の研究:海洋大循環の影響の考察Oral presentation
- 日本気象学会2017年度秋季大会, Oct. 2017, Japanese, 北海道大学 学術交流会館, Domestic conference全球海惑星の気候レジーム〜海洋大循環の効果〜Oral presentation
- 日本気象学会2017年度秋季大会, Oct. 2017, Japanese, 北海道大学 学術交流会館, Domestic conference高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造Oral presentation
- 地球電磁気・地球惑星圏学会第142 回総会・講演会, Oct. 2017, Japanese, 京都大学 宇治キャンパス, Domestic conference高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造Oral presentation
- 日本気象学会2017年度秋季大会, Oct. 2017, Japanese, 北海道大学 学術交流会館, Domestic conference乾燥大気理想化実験におけるQBO的周期振動のモデル依存性Oral presentation
- 日本気象学会 2017 年度秋季大会, Oct. 2017, Japanese, 北海道大学, Domestic conference火星大気境界層高解像度 LES によって得られた地表面応力に関する考察Poster presentation
- Joint SPARC Dynamics & Observations Workshop—QBOi, FISAPS & SATIO-TCS, Oct. 2017, English, International conferenceModel dependence of a QBO-like oscillation in a dry dynamical core experimentOral presentation
- 日本気象学会2017年度秋季大会, Oct. 2017, Japanese, 北海道大学 学術交流会館, Domestic conferenceAFES-Venus による金星大気のモデリング[Invited]Invited oral presentation
- 日本惑星科学会 秋季講演会, Sep. 2017, Japanese, 大阪大学, Domestic conference地球気候の太陽定数依存性: 海陸分布を考慮した大気大循環モデル実験Poster presentation
- 日本惑星科学会2017年度秋季講演会, Sep. 2017, Japanese, 大阪大学 豊中キャンパス, Domestic conference大気海洋海氷結合モデルを用いた全球海惑星気候の太陽定数依存性に関する研究Oral presentation
- 日本惑星科学会2017年秋季講演会, Sep. 2017, Japanese, Domestic conference高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造Oral presentation
- 日本惑星科学会 2017 年秋季講演会, Sep. 2017, Japanese, 大阪大学, Domestic conference高解像度の火星大気ラージエディーシミュレーションで得られた地表面応力Oral presentation
- European Planetary Science Congress 2017, Sep. 2017, English, International conferencePlanetary-scale streak structures produced in a high-resolution simulation of Venus atmosphereOral presentation
- JpGU-AGU Joint Meeting 2017, May 2017, English, 幕張メッセ, International conference惑星大気大循環モデルのための放射伝達モデルの開発に向けてOral presentation
- JpGU-AGU Joint Meeting 2017, May 2017, Japanese, 幕張メッセ, International conference惑星大気シミュレーションの高解像度化に向けて:理想化実験におけるQBO的周期振動のモデル依存性Oral presentation
- JpGU-AGU Joint Meeting 2017, May 2017, Japanese, 幕張メッセ, International conference大気海洋海氷結合モデルを用いた水惑星の気候に対する海洋大循環の影響の数値的研究Poster presentation
- JpGU-AGU Joint Meeting 2017, May 2017, English, 幕張メッセ, International conference高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造[Invited]Invited oral presentation
- JpGU-AGU Joint Meeting 2017, May 2017, Japanese, 幕張メッセ, International conference高解像度 LES によって得られた火星大気境界層における循環構造Poster presentation
- 日本気象学会2017春季大会, May 2017, Japanese, 国立オリンピック記念青少年総合センター, Domestic conference火星大気を想定した高解像度 LES で得られた地表面応力分布Oral presentation
- ポスト「京」萌芽的課題・計算惑星 第1回 公開シンポジウム, Mar. 2017, Japanese, 神戸大学 統合研究拠点, Domestic conference正二十面体格子モデルSCALE-GMによる火星大気シミュレーションに向けてOral presentation
- WTK Workshop on Aquaplanet - Landplanet, Feb. 2017, English, NAOJ, International conferenceGFD-Dennou Club DCMODEL project.Oral presentation
- WTK Workshop on Aquaplanet - Landplanet, Feb. 2017, English, CPS, Kobe University, International conferenceDevelopment of a coupled model to explore aquaplanet climates and aquaplanet simulation with zonally symmetric dynamic ocean.Oral presentation
- WTK Workshop on Aquaplanet - Landplanet, Feb. 2017, English, NAOJ, International conferenceClimate of synchronously rotating planet.Oral presentation
- Sixth International Workshop on the Mars Atmosphere: Modeling and Observation, Jan. 2017, Granada, Spain., International conferenceHigh resolution simulations of dust devils and global circulation of the Martian atmosphere.Oral presentation
- Sixth International Workshop on the Mars Atmosphere: Modelling and Observations, Jan. 2017, English, International conferenceHigh Resolution Simulations of Dust Devils and Global Circulation of the Martian atmospherePoster presentation
- 地球型惑星圏環境に関する研究集会, Dec. 2016, Japanese, 立教大学池袋キャンパス, Domestic conference大循環/気候モデルはどれほど汎惑星的になりうるか[Invited]Invited oral presentation
- 第30回 大気圏シンポジウム, Dec. 2016, Japanese, 宇宙科学研究所, Domestic conference簡易金星版 AFES 高解像度計算における運動エネルギースペクトル解析Oral presentation
- 2016 年日本気象学会秋季大会, Oct. 2016, Japanese, 名古屋大学, Domestic conference簡易金星版 AFES 高解像度計算におけるエネルギースペクトルの鉛直分布Oral presentation
- 2016 年日本気象学会秋季大会, Oct. 2016, Japanese, 名古屋大学, Domestic conferenceSCALE-LES を用いた火星大気高解像度計算で得られた大気最下層の循環構造Poster presentation
- 日本惑星科学会 2016年 秋季講演会, Sep. 2016, Japanese, ノートルダム清心女子大学, Domestic conference高解像度ラージエディーシミュレーションで得られた火星大気最下層における 対流の微細構造Poster presentation
- 熱帯気象研究会, Sep. 2016, English, 京都大学防災研究所, International conferenceReexamination of the concept of "Walker Circulation" --implicationfrom the variety of large-scale tropical atmospheric response to equatorial SST anomaly in Aquaplanet Experiment --.Oral presentation
- AOGS 2016, Aug. 2016, English, China National Convention Centre, Beijing, International conferenceA numerical experiment on occurrence condition of the runaway greenhouse state with an atmospheric general circulation modelOral presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference暴走温室状態の発生条件に関する大気大循環モデル実験Oral presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference潮汐固定されたガス惑星の大気大循環の多様性 -- 入射中心星放射強度に対する依存性Oral presentation
- 2016 年日本気象学会春季大会, May 2016, Japanese, 国立オリンピック記念青少年総合センター, Domestic conference潮汐固定されたガス惑星の大気大循環の多様性 -- 入射中心星放射強度に対する依存性Oral presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference地球型系外惑星の気候の数値的探索Poster presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference大気海洋海氷結合モデルによる水惑星の気候の数値実験Poster presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference対流が抑制される雲層における凝結物粒子の落下に伴う熱輸送Poster presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference湿潤大気に現れる対流圏界面高度の異なる二つの大気構造Oral presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference高解像度LESによる火星ダストデビルの統計的性質Poster presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference金星GCM(AFES)で再現された小規模擾乱の解析Oral presentation
- 日本地球惑星科学連合2016年大会, May 2016, Japanese, 幕張メッセ, Domestic conference火星境界層の高解像度LES実験[Invited]Invited oral presentation
- 日本地球惑星科学連合2016年大会, May 2016, English, 幕張メッセ, Domestic conferenceNumerical simulation of water cycle in a Martian atmosphere by the use of a planetary atmosphere general circulation model, DCPAMPoster presentation
- 2016 年日本気象学会春季大会, May 2016, Japanese, 国立オリンピック記念青少年総合センター, Domestic conferenceLine-by-line 放射計算による湿潤大気の 2 つの圏界面レジームPoster presentation
- 日本地球惑星科学連合2016年大会, May 2016, English, 幕張メッセ, Domestic conferenceDiagnostic experiments of lifted dust flux at the surface with Mars GCM: Consideration of the effects of topographyPoster presentation
- 2016 年日本天文学会春季大会, Mar. 2016, Japanese, 首都大学東京, Domestic conference暴走温室状態の発生条件に関する大気大循環モデル実験Poster presentation
- 平成27年度名古屋大学地球水循環研究センター研究集会「リモートセンシング・数値モデリングの利用と高度化による メソ・マイクロスケール大気・海洋現象に関する研究」, Mar. 2016, Japanese, 名古屋大学宇宙地球環境研究所, Domestic conference火星版 CReSS を用いた火星表層環境評価 ,Oral presentation
- International Workshop on "Exoplanets and Disks: Their Formation and Diversity III", Feb. 2016, English, Hotel Nikko Yaeyama, International conferenceTwo humidity regimes of stratosphere on a moist atmosphereOral presentation
- International Workshop on "Exoplanets and Disks: Their Formation and Diversity III", Feb. 2016, English, Hotel Nikko Yaeyama, International conferenceGCM experiments on the occurrence condition of the runaway greenhouse state on Earth-like exoplanetsOral presentation
- International Workshop on "Exoplanets and Disks: Their Formation and Diversity III", Feb. 2016, English, Hotel Nikko Yaeyama, International conferenceDiversity of atmospheric circulations of tidally locked gas giant planets -- dependence on the intrinsic heat flux strength[Invited]Invited oral presentation
- International Workshop on “Exoplanets and Disks: Their Formation and Diversity III, Feb. 2016, English, Hotel Nikko Yaeyama, International conferenceDevelopment of a general circulation model for shallow planetary atmospheres[Invited]Invited oral presentation
- International Workshop on "Exoplanets and Disks: Their Formation and Diversity III", Feb. 2016, English, Hotel Nikko Yaeyama, International conferenceDevelopment of a coupled atmosphere-ocean-seaice modelto explore aquaplanet climatesPoster presentation
- 第138回 SGEPSS総会および講演会, Oct. 2015, Japanese, 東京大学, Domestic conference惑星大気大循環モデル DCPAM を用いた火星大気中の水蒸気分布の計算Oral presentation
- 日本気象学会 2015 年度秋季大会, Oct. 2015, Japanese, 京都テルサ, Domestic conference簡易金星版 AFES 高解像度計算における運動エネルギーの波数間収支Oral presentation
- 日本気象学会 2015 年度春季大会, May 2015, Japanese, つくば国際会議場, Domestic conference惑星大気大循環モデルの構築 - 鉛直一次元設定での数値実験Oral presentation
- JpGU Meeting 2015, May 2015, Japanese, 幕張メッセ, Domestic conference惑星大気大循環モデルの構築 - 鉛直一次元設定での数値実験Oral presentation
- 日本気象学会 2015 年度春季大会, May 2015, Japanese, つくば国際会議場, Domestic conference水蒸気大気の圏界面の推定とハビタブルゾーンの内側境界Poster presentation
- JpGU Meeting 2015, May 2015, Japanese, 幕張メッセ, Domestic conference水蒸気大気の圏界面の推定とハビタブルゾーンの内側境界Oral presentation
- 日本気象学会 2015 年度春季大会, May 2015, Japanese, つくば国際会議場, Domestic conference火星探査のための表層環境評価: 雲解像モデル CReSS の火星大気への適用Poster presentation
- JpGU Meeting 2015, May 2015, Japanese, 幕張メッセ, Domestic conference火星探査のための表層環境評価: 雲解像モデル CReSS の火星大気への適用Oral presentation
- 平成 26 年度系外惑星大研究会, Mar. 2015, Japanese, 東京大学 情報学環 福武ホール, Domestic conference深部対流を考慮した木星型惑星大気循環の多様性 -- 下面熱流分布と大気層厚さの依存性Poster presentation
- 平成 26 年度系外惑星大研究会, Mar. 2015, Japanese, 東京大学 情報学環 福武ホール, Domestic conferenceDevelopment of a radiative transfer model for steam atmospheres and application to Earth-like planetsOral presentation
- 平成26年度 系外惑星大研究会, Mar. 2015, Japanese, Domestic conferenceDevelopment of a general circulation model for earth-like planetary atmospheresPoster presentation
- 東京大学大気海洋研究所共同利用研究集会, Nov. 2014, Japanese, 東京大学大気海洋研究所, Domestic conference赤道降水擾乱のモデル表現の解像度依存性Oral presentation
- 第58回宇宙科学技術連合講演会, Nov. 2014, Japanese, 長崎ブリックホール, Domestic conferenceEstimation of Mars Environment for Mars Surface Exploration SpacecraftOral presentation
- 平成24年度「京」を中核とするHPCIシステム利用研究課題 成果報告会, Oct. 2014, Japanese, Shinagawa, Domestic conference惑星探査計画に資する、惑星大気の高解像度実験Oral presentation
- 日本気象学会 2014 年度秋季大会, Oct. 2014, Japanese, 福岡国際会議場, Domestic conference惑星大気大循環モデル DCPAM を用いた MELOS1 探査機のための 火星表層環境評価Poster presentation
- 日本気象学会 2014 年度秋季大会, Oct. 2014, Japanese, Domestic conference惑星大気モデリング ~ 探査・系外惑星をにらんでPublic discourse
- 日本気象学会 2014 年度秋季大会, Oct. 2014, Japanese, 福岡国際会議場, Domestic conference非灰色放射および雲スキームを用いた同期回転惑星大気の数値実験Oral presentation
- 日本気象学会 2014 年度秋季大会, Oct. 2014, Japanese, 福岡国際会議場, Domestic conference系外惑星大気の 3 次元計算のための放射モデル開発Oral presentation
- 日本気象学会 2014 年度秋季大会, Oct. 2014, Japanese, 福岡国際会議場, Domestic conference火星におけるダスト循環過程スキームの DCPAM への実装とそれを用いた地表面ダストフラックスのパラメータ実験Oral presentation
- 日本惑星科学会2014年秋季講演会, Sep. 2014, Japanese, 東北大学片平キャンパス, Domestic conference同期回転惑星大気の数値実験: 昼夜間熱輸送に関する検討Oral presentation
- 日本惑星科学会2014年秋季講演会, Sep. 2014, Japanese, Domestic conference大気大循環モデルのための放射モデル開発: 同期回転惑星大気Oral presentation
- 日本惑星科学会2014年秋季講演会, Sep. 2014, Japanese, 東北大学片平キャンパス, Domestic conference初期火星大気中の主成分凝結対流の二次元数値実験 ー 雲分布の凝結核数混合比に対する依存性 ーOral presentation
- 日本惑星科学会2014年秋季講演会, Sep. 2014, Japanese, 東北大学片平キャンパス, Domestic conference巨大ガス惑星の雲層構造と放射冷却過程Oral presentation
- 日本惑星科学会2014年秋季講演会, Sep. 2014, Japanese, 東北大学片平キャンパス, Domestic conference火星ダスト巻き上げスキームの大気大循環モデル DCPAMへの実装及びダスト巻き上げフラックス診断実験Oral presentation
- 第47回 月・惑星シンポジウム, Aug. 2014, Japanese, ISAS 淵野辺, Domestic conference数値気象モデルを用いた着陸探査のための火星表層環境評価Oral presentation
- AOGS 11th Annual Meeting, Jul. 2014, English, ロイトン札幌, International conferenceTropospheric Cooling Rates of Gas Giant Planets in the Solar SystemOral presentation
- AOGS 11th Annual Meeting, Jul. 2014, English, ロイトン札幌, International conferenceSmall and Medium Scale Disturbances and Dust Lifting Represented in High Resolution Simulation of Martian AtmospherePoster presentation
- AOGS 11th Annual Meeting, Jul. 2014, English, ロイトン札幌, International conferenceImplementing Martian Dust Lifting Scheme into DCPAM, and a Diagnosising Experiment of Surface Dust FluxPoster presentation
- AOGS 11th Annual Meeting, Jul. 2014, English, ロイトン札幌, International conferenceHigh-resolution Large-eddy Simulation of the Martian Planetary Boundary LayerPoster presentation
- AOGS 11th Annual Meeting, Jul. 2014, English, ロイトン札幌, International conferenceEnergy Spectra of Atmospheric Motions Simulated by a High-resolution General Circulation Model of VenusOral presentation
- AOGS 11th Annual Meeting, Jul. 2014, English, ロイトン札幌, International conferenceAssessment of Mars Surface Environment for MELOS1 Lander Using Planetary General Circulation Model DCPAMPoster presentation
- 日本気象学会春季大会, May 2014, Japanese, 横浜情報文化センター, Domestic conference惑星大気大循環モデル dcpam を用いた MELOS ローバのための 火星表層環境評価Oral presentation
- 日本地球惑星科学連合 2014 年大会., May 2014, Japanese, パシフィコ横浜, Domestic conference惑星大気大循環モデル DCPAM を用いた MELOS1 探査機のための 火星表層環境評価Poster presentation
- 日本気象学会2014年度春季大会, May 2014, Japanese, 横浜, Domestic conference簡易金星版 AFES 高解像度計算のエネルギースペクトルOral presentation
- 日本地球惑星科学連合 2014 年大会, May 2014, Japanese, パシフィコ横浜, Domestic conference簡易金星大気大循環モデル高解像度計算の運動エネルギースペクトルOral presentation
- 日本地球惑星科学連合 2014 年大会., May 2014, Japanese, パシフィコ横浜, Domestic conference火星におけるダスト巻き上げスキームの DCPAM への実装 とそれを用いた地表面ダストフラックス診断実験Poster presentation
- 日本地球惑星科学連合 2014 年大会, May 2014, Japanese, パシフィコ横浜, Domestic conferenceLine-by-line 放射計算による水蒸気大気の放射特性Oral presentation
- Fifth international workshop on the Mars atmosphere: Modelling and observations, Jan. 2014, English, Oxford Univ., U.K., International conferenceDust Lifting represented in a High Resolution Mars Atmosphere General Circulation ModelPoster presentation
- 5th Subaru International Conference: Exoplanets and Disks: Their Formation and Diversity II, Dec. 2013, English, Sheraton Kona Resort & Spa Keauhou Bay, The Big island of Hawaii, International conferenceDiversity of atmospheric circulations of sycronized rotating Jovian type planets.Oral presentation
- 5th Subaru International Conference: Exoplanets and Disks: Their Formation and Diversity II, Dec. 2013, English, Sheraton Kona Resort & Spa Keauhou Bay, The Big island of Hawaii, International conferenceDevelopment of radiative transfer model for exoplanets with steam atmospheresPoster presentation
- 5th Subaru International Conference: Exoplanets and Disks: Their Formation and Diversity II, Dec. 2013, English, Sheraton Kona Resort & Spa Keauhou Bay, The Big island of Hawaii, International conferenceDevelopment of a general circulation model for earth-like planetary atmospheres and its applicationPoster presentation
- 日本惑星科学会2013年度秋季講演会, Nov. 2013, Japanese, 石垣市民会館, Domestic conference同期回転惑星大気の数値実験 : 非灰色放射スキームと雲スキームを用いた場合Oral presentation
- 日本惑星科学会2013年度秋季講演会, Nov. 2013, Japanese, 石垣市民会館, Domestic conference大気大循環モデルを用いた木星型惑星大気の数値実験Oral presentation
- 日本気象学会秋季大会, Nov. 2013, Japanese, 仙台国際センター, Domestic conference大気大循環モデルを用いた木星型惑星大気の数値実験Oral presentation
- 地球電磁気・地球惑星圏学会第134回総会・講演会, Nov. 2013, Japanese, 高知大学, Domestic conference大気大循環モデルを用いた木星型惑星大気の数値実験Poster presentation
- 日本惑星科学会2013年度秋季講演会, Nov. 2013, Japanese, 石垣市民会館, Domestic conferenceCReSSを用いた火星気象予測実験Poster presentation
- RIMS International Conference on Zonal Flows in Geophysical and Astrophysical Flouds, Nov. 2013, English, 京都, Domestic conferenceAtmospheric general circulations of synchronously rotationg water-covered exoplanets: Dependence on planetary rotation ratePoster presentation
- 第46回月・惑星シンポジウム, Aug. 2013, Japanese, 宇宙航空研究開発機構 宇宙科学研究所, Domestic conference火星境界層乱流の LES 実験Oral presentation
- 日本気象学会春季大会, May 2013, Japanese, 国立オリンピック記念青少年総合センター, Domestic conference木星大気の雲対流の直接数値計算: 雲対流の間欠性に関する考察Oral presentation
- JPGU2013, May 2013, Japanese, Makuhari Messe, Domestic conference火星大気大循環モデルで表現される火星中層大気子午面循環Poster presentation
- 系外惑星大気ワークショップ, Mar. 2013, Japanese, 新学術領域研究 A02 系外惑星大気の数値モデリングと形成進化理論, 東京大学 本郷, Domestic conference同期回転惑星の大気循環と熱収支: 自転角速度および太陽定数依存性Oral presentation
- 第 62 回理論応用力学講演会, Mar. 2013, Japanese, 日本学術会議/「機械工学委員会,土木工学・建築学委員会合同IUTAM分科会」, 東京工業大学大岡山キャンパス, 東京都, Domestic conference海洋に覆われた同期回転惑星の大気大循環Oral presentation
- 44th Lunar and Planetary Science Conference, Mar. 2013, English, Lunar and Planetary Institute, Woodlands, Texas, USA, International conferenceMERIDIONAL CIRCULATION OF MARTIAN MIDDLE ATMOSPHERE SIMULATED BY A MARS GENERAL CIRCULATION MODELPoster presentation
- 44th Lunar and Planetary Science Conference, Mar. 2013, English, Lunar and Planetary Institute, Woodlands, Texas, U.S.A, International conferenceA numerical study on atmospheric general circulations of synchronously rotating aqua-planets: Dependence on planetary rotation rate and Solar ConstantOral presentation
- 平成 24 年度宇宙科学情報解析シンポジウム, Feb. 2013, Japanese, ISAS, ISAS 相模原, Domestic conference地球流体電脳倶楽部 DCMODELプロジェクトと 数値モデルを用いた惑星大気研究についてOral presentation
- 火星探査ワーキンググループ集会, Feb. 2013, Japanese, 火星探査ワーキンググループ, ISAS 相模原, Domestic conference火星探査のための 局地気象シミュレーション実施計画Oral presentation
- 平成 24 (2012) 年度地球シミュレータ利用報告会, Jan. 2013, Japanese, 地球シミュレータセンター, JAMSTEC 地球シミュレータセンター, Domestic conferenceAFES を用いた 地球型惑星の大気大循環 シミュレーションOral presentation
- 火星大気圏・電磁圏研究会, Dec. 2012, Japanese, 惑星大気圏・電離圏研究会, 東京, Domestic conference火星大気大循環モデルで表現される中層大気循環[Invited]Invited oral presentation
- AGU Fall Meeting, Dec. 2012, English, America Geophysical Union, Moscone Center, San Francisco, CA, US., International conferenceNumerical Modeling of Cloud Convection in Jupiter's Atmosphere: robustness and a mechanism of the intermittent emergence of vigorous cumulonimbus cloudsPoster presentation
- AGU Fall Meeting, Dec. 2012, English, America Geophysical Union, Moscone Center, San Francisco, CA, US., International conferenceConstruction of Hierarchical Models for the Fluid Dynamics in Earth and Planetary Sciences : DCMODEL projectPoster presentation
- American Geophysical Union 2012 fall meeting, Dec. 2012, English, American Geophysical Union, San Francisco, USA, International conferenceConstruction of Hierarchical Models for Fluid Dynamics in Earth and Planetary Sciences : DCMODEL projectPoster presentation
- 日本惑星科学会, Oct. 2012, Japanese, 地球電磁気・地球惑星圏学会, 神戸, Domestic conference惑星大気探査を見据えた大気大循環モデルの構築に向けてOral presentation
- 日本気象学会秋季講演会, Oct. 2012, Japanese, 地球電磁気・地球惑星圏学会, 札幌, Domestic conference惑星大気探査を見据えた大気大循環モデルの構築に向けてOral presentation
- 地球電磁気地球惑星圏学会, Oct. 2012, Japanese, 地球電磁気・地球惑星圏学会, 札幌, Domestic conference惑星大気探査を見据えた大気大循環モデルの構築に向けてOral presentation
- 日本気象学会 2012 年度秋季大会, Oct. 2012, Japanese, 日本気象学会, 北海道大学, Domestic conference惑星大気大循環モデルdcpam を用いた金星設定における放射強制変更実験Oral presentation
- 日本気象学会 2012 年度秋季大会, Oct. 2012, Japanese, 日本気象学会, 北海道大学, Domestic conferenceAFESを用いた金星大気の 傾圧不安定に関する研究Oral presentation
- JSST 2012 International Conference on Simulation Technology, Sep. 2012, English, 日本シミュレーション学会(JSST), 神戸, International conferenceToward high resolution simulation for the atmosphere on Venus by AFES (Atmospheric GCM For the Earth Simulator)Oral presentation
- JSST 2012 International Conference on Simulation Technology, Sep. 2012, English, 日本シミュレーション学会(JSST), 神戸, International conferenceConstruction of Hierarchical Models for the Fluid Dynamics in Earth and Planetary Sciences : DCMODEL projectOral presentation
- 月惑星シンポジウム, Aug. 2012, Japanese, 宇宙科学研究所, 相模原, Domestic conference惑星大気探査を見据えた大気大循環モデルの構築に向けて-火星大気の場合Oral presentation
- Comparative Climatology of Terrestrial Planets, Jun. 2012, English, NASA, USRA 他, Boulder Colorado, U.S., International conferenceAtmospheric general circulations of synchronously rotating terrestrial planets: Dependence on planetary rotation rate Comparative Climatology of Terrestrial PlanetsPoster presentation
- 日本地球惑星科学連合 2012 年大会, May 2012, Japanese, 地球惑星科学連合, 幕張, Domestic conference惑星大気大循環モデルの開発 - 地球大気計算と大循環の自転軸依存性 -Poster presentation
- 日本地球惑星科学連合 2012 年大会, May 2012, English, 日本地球惑星科学連合, 幕張, International conferenceTwo-dimensional simulation of Martian atmospheric convection with the major component condensation over CO2 ice surfaceOral presentation
- 第 8 回 太陽系外惑星大研究会, Apr. 2012, Japanese, 太陽系外惑星大研究会, 国立天文台, 熱海, Domestic conferenceNumerical modeling of moist convection in Jupiter’s atmosphereOral presentation
- 第 8 回 太陽系外惑星大研究会, Apr. 2012, Japanese, 太陽系外惑星大研究会, 国立天文台, 熱海, Domestic conferenceDependence of the atmospheric general circulation of synchronously rotating terrestrial planets on planetary rotation rateOral presentation
- The General Assembly 2012 of the European Geosciences Union (EGU), Apr. 2012, English, EGU, Vienna, Austria, International conferenceDependence of the atmospheric general circulation of synchronously rotating terrestrial planets on planetary rotation rateOral presentation
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Kyoto University, Apr. 2021 - Mar. 2025地球流体力学的アプローチによる木星型惑星大気の研究
- 日本学術振興会, 科学研究費助成事業 基盤研究(C), 基盤研究(C), 神戸大学, 01 Apr. 2021 - 31 Mar. 2024金星下層大気の熱構造の数値的探究
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Hokkaido University, Apr. 2019 - Mar. 2023Explorations of climate diversity of terrestrial exo-planets and estimations of parameters based on climate states本研究は, 大気大循環モデルを用いて海陸分布・自転角速度・自転傾斜角などを変更した包括的なパラメータ実験を実施し, その結果を模擬観測に提供し系外惑星観測をおこなった場合にどのような光度データをもたらすのかを明らかにする. これらを通じて, 将来の直接撮像スペース望遠鏡で系外惑星の観測を行った際に, 惑星の海陸分布・自転角速度・自転傾斜角を推定する方法について検討をおこなう. 本年度は, 以下の研究活動を行なった. (0) RAID の設置. 備品としてRAID装置を購入した. これによりパラメータ実験のデータ領域の確保ができた. (1) パラメータ実験として、地球設定を用いた自転傾斜角変更実験・地球に比較して表層の水量が極めて少ない陸惑星実験・全球が海洋に覆われた海惑星実験を実施した. (2) 自転傾斜角変更実験の結果の模擬観測を行なうことにより, 地球と同じ海陸分布を持ち 10 パーセクの距離にある惑星の北半球を口径 4m の宇宙望遠鏡で 1 年間の連続観測を行なった場合、惑星の自転傾斜角を数度の精度で推定できることが示された. (3) 陸惑星実験では、太陽定数を変更した数値実験を行なうことにより、過去の研究結果よりも広い太陽定数範囲で表層に液体の水が存在し得ることが示された. (4) 水惑星実験では、灰色大気の場合についての太陽定数変更実験を実施し, 過去に我々が作成していた気候レジームダイアグラム図の修正・更新を行なった. (5) 放射モデル開発も行ない、過去火星における過酸化水素による温暖化効果に関する考察も行なった. (6) 以上の成果に関する議論を行なう国際ワークショップも開催した.
- Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Tokyo Institute of Technology, Jun. 2017 - Mar. 2022, CoinvestigatorModeling of water and material circulations in the solar system objects本研究では、太陽系天体における水・物質循環に関する実証可能な物理モデルを構築し、多様な水環境を有する太陽系天体が、いかにして作られたのかを明らかにする。最終的には、実験班により定量化された化学過程を、各天体の物理モデルに組み込み、探査・分析データを実証として、太陽系天体の水・物質循環の歴史を紐解くことを目的とする。 多様な小天体の水・揮発性元素量解明を目的とし、小天体内部の水岩石反応から予想される鉱物組み合わせに対して理論スペクトル計算を行い、近赤外リモセンデータから母天体組成を制約する理論的枠組みを構築した。また、衝突計算を行い、リュウグウを形成した母天体の破壊的な衝突によって一部の含水鉱物が脱水するが、一部は生き残ることを明らかにした。はやぶさ2に続くミッションである火星衛星探査計画も推進している。 氷天体の内部海の維持に関しては、特に冥王星を対象にした研究を進めた。ガスハイドレートの薄い層が内部海の凍結を防ぐことがわかった。同時に、巨大盆地の安定性や、窒素に富む表層などといった冥王星の謎も解明できることを明らかにした。 金星の大気大循環モデル実験および、古火星大気を想定した大気放射モデルの構築を行った。金星大気実験からは、金星探査機あかつきが発見した惑星規模筋状構造の成因を明らかにした。火星に関しては、酸化的大気組成下での太古の流水活動を示す火星探査データを受け、過酸化水素による温暖化機構を提唱した。 地球型惑星の大気と水の起源解明を目的とし、揮発性元素供給・分配・散逸の理論モデル構築を行った。その成果として、原始惑星円盤内のダスト進化・小天体組成に応じた初期惑星の水量・大気組成の予想が可能となった。また、集積期の火星大気形成と進化を、脱ガス成分と原始太陽系星雲ガス成分の成層性を考慮し、含水素大気の長寿命化の可能性を示した。
- 日本学術振興会, 二国間交流事業(フランスとのセミナー), 2015, Principal investigator二国間交流「日仏連携による惑星大気モデル研究」Competitive research funding
- 科学研究費補助金/若手研究(B), 2008, Principal investigatorCompetitive research funding