研究者紹介システム

大串 健一
オオクシ ケンイチ
大学院人間発達環境学研究科 人間環境学専攻
教授
地学関係
Last Updated :2022/01/10

研究者情報

所属

  • 【主配置】

    大学院人間発達環境学研究科 人間環境学専攻
  • 【配置】

    国際人間科学部 環境共生学科, 発達科学部 人間環境学科

学位

  • 博士(理学), 筑波大学

授業科目

ミニ講義

ジャンル

  • 環境・交通 / 地球環境
  • 防災・くらし / 津波

コメントテーマ

  • 地球環境変動
  • 古環境
  • 地球温暖化
  • 古海洋
  • 最終氷期
  • 津波堆積物

研究活動

研究キーワード

  • 古海洋

研究分野

  • 自然科学一般 / 地球生命科学

論文

  • Keisuke Sakai, Ken’ichi Ohkushi, Akihiko Shibahara

    Springer Science and Business Media LLC, 2021年03月, Geo-Marine Letters, 41 (1)

    [査読有り]

    研究論文(学術雑誌)

  • つるかぶと科学教室の実施報告

    新井敏夫, 大串健一

    2020年09月, 神戸大学大学院人間発達環境学研究科研究紀要, 14 (1), 135 - 138

    研究論文(大学,研究機関等紀要)

  • RADIOCARBON AGE OFFSETS OF PLANTS AND BIOCLASTS IN THE HOLOCENE SEDIMENTS FROM THE MIYAZAKI PLAIN, SOUTHEAST COAST OF KYUSHU, SOUTHWEST JAPAN

    Toshimichi Nakanishi, Wan Hong, Mitsuhiro Kuwahata, Shinji Sugiyama, Shoichi Shimoyama, Ken’ichi Ohkushi, Tatsuhiko Yamaguchi, Jung-Hun Park, Gyujun Park, Futoshi Nanayama

    2019年12月, Radiocarbon, 61 (6), 1939 - 1950, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 古環境の色々

    大串健一

    2019年11月, 武庫川女子大学生活美学研究所紀要, (29), 9 - 17

    [招待有り]

  • Response of deep-sea benthic foraminifera to paleoproductivity changes on the Shatsky Rise in the northwestern Pacific Ocean over the last 187 kyr

    OHKUSHI Ken'ichi, HATA Motoko, NEMOTO Naoki

    2018年10月, Paleontological Research, 22 (4), 326 - 351, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 山本 雄大, 陀安 一郎, 藪崎 志穂, 申 基澈, 中野 孝教, 横山 正, 三橋 弘宗, 大串 健一, 伊藤 真之

    神戸大学, 2018年09月, 神戸大学大学院人間発達環境学研究科紀要, 12 (1), 67 - 74, 日本語

    研究論文(大学,研究機関等紀要)

  • Radiocarbon age differences between benthic–planktonic foraminifera in sediment cores from the Shatsky Rise, central North Pacific

    Ken'ichi Ohkushi, Masao Uchida, Yasuyuki Shibata

    日本堆積学会, 2017年12月, Journal of the Sedimentological Society of Japan, 76 (1), 17 - 27, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 山本 雄大, 陀安 一郎, 中野 孝教, 藪崎 志穂, 横山 正, 三橋 弘宗, 大串 健一, 伊藤 真之, 蛯名 邦禎

    兵庫県西部を流れる千種川は清流として知られる一方, しばしば大雨による河川氾濫が発生している. 2016年まで, 災害防止の目的で河川整備工事が行われたが, 工事による河川環境の変化や河川生態系への影響が懸念されている. 本研究では千種川の水循環や人為改変の環境影響評価の研究に必要な基礎データを得ることを目的として, 2015年8月9日に採取された河川水試料83点について, 水の水素・酸素同位体比を分析した.分析の結果は地理情報システム(GIS)により流域地図にマッピングした. 結果として, 千種川流域では, 水素・酸素同位体比ともに上流部で低い値を示し, 主要支流の佐用川や, 千種川下流に流入する支流では高い値を示した. また, 上流~中流では高度効果の影響を受けた降水の寄与がみられており, 千種川流域全体で蒸発の影響が大きいことが推測される.

    神戸大学大学院人間発達環境学研究科, 2017年09月, 神戸大学大学院人間発達環境学研究科紀要, 11 (1), 105 - 109, 日本語

    [査読有り]

    研究論文(大学,研究機関等紀要)

  • 千種川の水環境に関する共同研究プロジェクトの予察的報告

    大串 健一, 中野 孝教, 陀安 一郎, 横山 正, 三橋 弘宗, 山本 雄大, 伊藤 真之, 蛯名 邦禎

    神戸大学大学院人間発達環境学研究科, 2017年03月, 神戸大学大学院人間発達環境学研究科研究紀要, 10 (2), 165 - 173, 日本語

    研究論文(大学,研究機関等紀要)

  • Kwangkyu Park, Ken'ichi Ohkushi, Hyen Goo Cho, Boo-Keun Khim

    Paleoceanographic multi-proxies were investigated from two piston cores PC01 and PC04, along with two pilot cores PL01 and PL04, collected from the Chukchi Rise in the western Arctic Ocean during the R/V Mirai Cruise MR09-03. Both cores were composed of three lithologic units (Unit I: the Holocene brownish sandy mud, Unit II: the deglacial IRD layer, and Unit III: the glacial and gray thick mud with intervened IRD layers). The age estimate of the core units were decided by AMS C-14 dates and confirmed by the correlation of the geochemical properties and ice-rafted debris (IRD) pattern with the well-dated core (P2) in the study area. The geochemical, isotopic, and mineralogical properties indicate different paleoceanographic conditions of three lithologic units in the Chukchi Rise: low primary production during the glacial period (Unit III), high terrigenous contribution during the deglacial period (Unit II), and increase in diatom productivity during the late Holocene (Unit I). In particular, most IRDs were specified as detrital carbonates (calcites and dolomites) by SEM-EDS examination. The sediment source from the northern North America and the transport pathway by the Beaufort Gyre were confirmed by the isotopic signature of bulk IRDs and high kaolinite content of fine-grained particles. (C) 2017 Elsevier B.V. and NIPR. All rights reserved.

    ELSEVIER SCIENCE BV, 2017年03月, POLAR SCIENCE, 11, 42 - 53, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Hodaka Kawahata, Yui Ishizaki, Azumi Kuroyanagi, Atsushi Suzuki, Ken-ichi Ohkushi

    The first emergence and development of pottery is an important archeological research topic. Climate change and associated ecological changes likely promoted the development of pottery. However, little is known about these environmental factors at the regional scale. Sedimentary Core MD01-2409 was collected off the coast of northern Honshu, Japan, and provided an excellent opportunity to quantitatively estimate temperature using an alkenone proxy. This estimation is based upon the positive correlation between the sea surface temperature (SST) and the atmospheric temperature (AT) near the core collection site. The Jomon began to produce the earliest pottery found in Japan during this period. This corresponds to a climatic anomaly that could be attributed to one of the global effects of the Heinrich Event I. The event's origin in the northern North Atlantic consequently weakened the Asian Monsoon because the two are linked via atmospheric circulation. Japan experienced its coldest summer (SST of 8.7 degrees C; AT of 5.2 degrees C) around 15.68 cal kyr BP; these summer temperatures were approximately 7-11 degrees C lower than they are currently (similar to 15.7 degrees C and 16.7 degrees C), respectively. The summer environment was a little colder than those experienced in the present-day cities of Nemuro and/or Nosappu in Hokkaido. Subsistence in a terrestrial environment would have been difficult for the Jomon people; however, marine products such as fish and shellfish would have been plentiful. These conditions are consistent with the evidence that the earliest pottery was predominantly used for cooking marine and freshwater resources and increased diversification in the range of aquatic products used. The Bolling Allerod and pre-Boreal warm Episodes during deglaciation warmed climatic environments and enhanced marine biogenic production. The maximum SST during this period is comparable to the modern SST despite its short duration (of approximately a century or less). Even though the relationship between climate and the appearance of pottery in Japan may not be direct, the earliest pottery and projectile points (stone arrows) in the world are associated with the coldest period that Homo sapiens experienced since arriving in the colder regions of the Japanese archipelago.(C) 2016 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, 2017年02月, Quaternary Science Reviews, 157, 66 - 79, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Intensification of North Pacific intermediate water ventilation during the Younger Dryas

    Ken’ichi Ohkushi, Naoki Hara, Minoru Ikehara, Masao Uchida, Naokazu Ahagon

    2016年04月, Geo-Marine Letters, 1 - 8, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Toshiaki Irizuki, Miki Kobe, Ken'ichi Ohkushi, Hodaka Kawahata, Katsunori Kimoto

    Using the record of shallow-marine ostracode fauna and sediment grain size data from an 865-cm-long piston core obtained from Mutsu Bay, northeast Japan, paleoceanographic changes of the bay were determined at high resolution for the early to middle Holocene. Changes in the relative frequencies of several species showed periodicities of 1300-1800 years similar to Bond cycles. At around 10,300 cal yr BP and again, at 9500-9300 cal yr BP, cold water strongly influenced the bay owing to cooling events. Since at least 10,200 cal yr BP the Tsugaru Warm Current influenced the surface waters, and, since ca. 7400 cal yr BP, also the bottom waters of the bay. Since ca. 8400 cal yr BP the water depth rapidly increased and peaked at 7000-5900 cal yr BP due to global sea-level rise. Subsequently, a drop of water temperature and sea level in the bay at 5900 and around 4000 cal yr BP influenced the composition of the ostracode assemblages. These millennial-scale oscillations in relative sea level and bay temperature during the Holocene can be correlated to paleoclimate records elsewhere. (C) 2015 University of Washington. Published by Elsevier Inc. All rights reserved.

    ACADEMIC PRESS INC ELSEVIER SCIENCE, 2015年11月, QUATERNARY RESEARCH, 84 (3), 467 - 480, 英語

    研究論文(学術雑誌)

  • 東北地方太平洋沖地震津波により岩手県久慈市に形成された津波堆積物

    瀬尾 菜々美, 大串 健一

    神戸大学大学院人間発達環境学研究科, 2014年09月, 神戸大学大学院人間発達環境学研究科研究紀要, 8 (1), 97 - 102, 日本語

    [査読有り]

    研究論文(大学,研究機関等紀要)

  • Sarah E. Moffitt, Tessa M. Hill, Kenichi Ohkushi, James P. Kennett, Richard J. Behl

    Here we present a history of deoxygenation of upper intermediate waters during the last deglaciation from Santa Barbara Basin (SBB), based on quantitative analyses of benthic foraminiferal assemblages, from a new shallow piston core above basin sill depth (MV0811-15JC, 418 m), and previously described sequences in the deeper basin (MD02-2504, 481 m and MD02-2503, 570 m). We document a 152 m depth transect of benthic foraminiferal assemblages to extract changing community structure (density, diversity, and evenness) and improve paleoenvironmental interpretation of late Quaternary vertical oscillations in the upper boundary of the oxygen minimum zone (OMZ). Close interaction between changes in open margin OMZ and that of the restricted SBB is documented using these quantitative techniques. MV0811-15JC, while being unlaminated, contains strongly hypoxic foraminiferal assemblages (including species Bolivina tumida and Nonionella stella), coeval with preserved sediment laminations in the deeper cores. Last Glacial Maximum (LGM) assemblages across this transect contained oxic fauna and high diversity. At 14.7 ka, glacial termination IA, hypoxic benthic fauna appeared across the transect, recording hypoxic waters (<0.5ml L-1) < 300m from the ocean surface. Bolling/Allerod (B/A) assemblages uniquely stand out in the record, exhibited by low density, diversity, and evenness, and taxonomic composition reflecting extreme and stressful hypoxia and methane-rich environments. Younger Dryas assemblages were diverse and composed of oxic fauna, similar to LGM assemblages. Termination IB initiated another deoxygenation shift, followed by OMZ-associated faunal and density patterns. This analysis strengthens the quantitative assessment of oxygen concentrations involved in deglacial OMZ change and reveals the unexpected, remarkable shallowness of OMZ influence during the B/A.

    AMER GEOPHYSICAL UNION, 2014年01月, PALEOCEANOGRAPHY, 29 (1), 44 - 57, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A new local marine reservoir correction for the last deglacial period in the Sanriku region, northwestern North Pacific, based on radiocarbon dates from the Towada-Hachinohe (To-H) tephra

    Ken Ikehara, Ken'ichi Ohkushi, Atsushi Noda, Toru Danhara, Toru Yamashita

    日本第四紀学会, 2013年08月, 第四紀研究, 52 (4), 127 - 137, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Rapid pulses of uplift, subsidence, and subduction erosion offshore Central America: Implications for building the rock record of convergent margins

    Paola Vannucchi, Peter B. Sak, Jason, P. Morgan, Ken'ichi Ohkushi, Kohtaro Ujiie, the IODP Expeditio, Shipboard Scientists

    2013年07月, Geology, 41 (9), 995 - 998, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Ohkushi, J. P. Kennett, C. M. Zeleski, S. E. Moffitt, T. M. Hill, C. Robert, L. Beaufort, R. J. Behl

    The oxygen minimum zone (OMZ) of the late Quaternary California margin experienced abrupt and dramatic changes in strength and depth in response to changes in intermediate water ventilation, ocean productivity, and climate at orbital through millennial time scales. Expansion and contraction of the OMZ is exhibited at high temporal resolution (107-126 year) by quantitative benthic foraminiferal assemblage changes in two piston cores forming a vertical profile in Santa Barbara Basin (569 m, basin floor 481 m, near sill depth) to 34 and 24 ka, respectively. Variation in the OMZ is quantified by new benthic foraminiferal groupings and new dissolved oxygen index based on documented relations between species and water-mass oxygen concentrations. Foraminiferal-based paleoenvironmental assessments are integrated with principal component analysis, bioturbation, grain size, CaCO3, total organic carbon, and δ13C to reconstruct basin oxygenation history. Fauna responded similarly between the two sites, although with somewhat different magnitude and taxonomic expression. During cool episodes (Younger Dryas and stadials), the water column was well oxygenated, most strongly near the end of the glacial episode (17-16 ka Heinrich 1). In contrast, the OMZ was strong during warm episodes (Bølling/Allerød, interstadials, and Pre-Boreal). During the Bølling/Allerød, the OMZ shoaled to < 360 m of contemporaneous sea level, its greatest vertical expansion of the last glacial cycle. Assemblages were then dominated by Bolivina tumida, reflecting high concentrations of dissolved methane in bottom waters. Short decadal intervals were so severely oxygen-depleted that no benthic foraminifera were present. The middle to late Holocene (6-0 ka) was less dysoxic than the early Holocene. Key Points Strong OMZ at Bolling/Allerod, interstadials and the earliest HoloceneBolling/Allerod OMZ shoaled to & lt 360 m of contemporaneous sea levelNew benthic foraminiferal oxygen index based upon hydrographic documentation. © 2013. American Geophysical Union. All Rights Reserved.

    AGU, 2013年, Paleoceanography, 28 (3), 453 - 467, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Changes in chemical compositions of sea-salt particles collected at Mt. Rokko, Kobe, Japan

    Shohei Mukai, 大串 健一

    気象研究所, 2013年01月, 気象研究所技術報告, 68, 53-54, 英語

    研究論文(研究会,シンポジウム資料等)

  • SEM-EDSを用いた神戸市東部におけるエアロゾルの個別粒子分析

    向井 将平, 大串 健一

    2012年09月, 神戸大学大学院人間発達環境学研究科研究紀要, 6・1/47ー52, 日本語

    [査読有り]

    研究論文(学術雑誌)

  • Stephan F. Rella, Ryuji Tada, Kana Nagashima, Minoru Ikehara, Takuya Itaki, Ken'ichi Ohkushi, Tatsuhiko Sakamoto, Naomi Harada, Masao Uchida

    Millennial-scale variability in the behavior of North Pacific Intermediate Water during the last glacial and deglacial period, and its association with Dansgaard-Oeschger (D-O) cycles and Heinrich events, are examined based on benthic foraminiferal oxygen and carbon isotopes (delta O-18(bf) and delta C-13(bf)) and %CaCO3 using a sediment core recovered from the northeastern slope of the Bering Sea. A suite of positive delta O-18(bf) excursions at intermediate depths of the Bering Sea, which seem at least in part associated with increases in the delta O-18(bf) gradients between the Bering and Okhotsk Seas, suggest the Bering Sea as a proximate source of intermediate water during several severe stadial episodes in the last glacial and deglacial period. Absence of such delta O-18(bf) gradients during periods of high surface productivity in the Bering and Okhotsk Seas, which we correlate to D-O interstadials, suggests a reduction in intermediate water production in the Bering Sea and subsequent introduction of nutrient-rich deep waters from the North Pacific into intermediate depths of the Bering Sea. We argue that a reorganization of atmospheric circulation in the high-latitude North Pacific during severe cold episodes in the last glacial and deglacial period created favorable conditions for brine rejection in the northeastern Bering Sea. The resulting salinity increase in the cold surface waters could have initiated intermediate (and deep) water formation that spread out to the North Pacific.

    AMER GEOPHYSICAL UNION, 2012年07月, PALEOCEANOGRAPHY, 27, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 岩手県普代川河口域に遡上した津波堆積物の予察的調査報告

    瀬尾 菜々美, 大串 健一

    2012年03月, 神戸大学大学院人間発達環境学研究科研究紀要, 5(2), 日本語

    研究論文(学術雑誌)

  • Ken Ikehara, Tohru Danhara, Tohru Yamashita, Manabu Tanahashi, Sumito Morita, Ken'ichi Ohkushi

    Knowledge of the marine reservoir effect is important in calibrating radiocarbon ages to calendar ages, and in correlating geologic and paleoceanographic events among different sites, including global events. Large, explosive volcanic eruptions have yielded numerous volcanic ash layers (tephras) over geological time. Because tephra layers are deposited both on land and upon the seafloor, they represent a unique and important link between the geological records of terrestrial and marine areas. Comparison of the radiocarbon ages of a tephra layer deposited in marine (planktonic foraminifera) and terrestrial (peat) materials reveals a local marine reservoir age (600-700 years or more) during the early part of the last deglaciation off Tokai, south of Japan. This age is larger than that determined for the present-day Pacific coast of Japan (82 years) and similar to that of the present-day subarctic NW Pacific (350-580 years). This difference between modern-day and deglaciation marine reservoir values is thought to reflect the contrasting properties of surface water masses between the two periods. (C) 2011 Elsevier Ltd and INQUA. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, 2011年12月, QUATERNARY INTERNATIONAL, 246, 213 - 221, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Costa Rica Seismogenesis Project (CRISP), Sampling and quantifying input to the seismogenic zone and fluid output

    Vannucchi, P, 番目にOhkushi, K, 大串 健一

    2011年, Integrated Ocean Drilling Program (IODP) Expedition 334 Preliminary Report, 334, doi:10.2204/iodp.pr.334.2, 英語

    研究論文(学術雑誌)

  • 5.1. Sediment core sampling

    大串 健一, Konno, S

    2010年, R/V Mirai Cruise Report, MR09-03, Arctic Ocean, Bering Sea, and North Pacific Ocean,28th August to 25th October, 2009, Japan Agency for Marine-Earth Science and Technology, 118-153, 英語

    研究論文(学術雑誌)

  • Hodaka Kawahata, Hisashi Yamamoto, Ken'ichi Ohkushi, Yusuke Yokoyama, Katsunori Kimoto, Hideki Ohshima, Hiroyuki Matsuzaki

    Sannai-Maruyama is one of the most famous and best-researched mid-Holocene (mid-jomon) archaeological sites in Japan, because of a large community of people for a long period. Archaeological studies have shown that the Jomon people inhabilted the Sannai-Maruyama site from 5.9 to 4.2 +/- 0.1 cal kyr BP However, a continuous record of the terrestrial and marine environments around the site has not been available. Core KT05-7 PC-02, was recovered from Mutsu Bay, only 20 km from the site, for the reconstruction of high-resolution time series of environmental records, including sea surface temperature (SST). C-37 alkenone SSTs showed clear fluctuations, with four periods of high (8.4-7.9, 7.0-5.9, 5.1-4.1, and 2.3-1.4 cal kyr BP) and four of low (-8.4, 7.9-7.0, 5.9-5.1, and 4.1-2.3 cal kyr BP) SST. Thus, each SST cycle lasted 1.0-2.0 kyr, and the amplitude of fluctuation was about 1.5-2.0 degrees C. Total organic carbon (TOC) and C37 alkenone contents, and the TOC/total nitrogen ratio indicate that marine biogenic production was low before 7.0 cal kyr BP, but was clearly increased between 5.9 and 4.0 cal kyr BP, because of stronger vertical mixing. During the period when the community at the site prospered (between 5.9 and 4.2 0.1 cal kyr BP), the terrestrial climate was relatively warm. The high relative abundance of pollen of both Castanea and Quercus subgen. Cyclobalanopsis supports the interpretation that the local climate was optimal for human habitation. Between 5.9 and 5.1 cal kyr BP, in spite of warm terrestrial climates, the C-37 alkenone SST was low; this apparent discrepancy may be attributed to the water column structure in the Tsugaru Strait, which differed from the modem condition. The evidence suggests that at about 5.9 cal kyr B.P, high productivity of marine resources such as fish and shellfish and a warm terrestrial climate led to the establishment of a human community at the Sannai-Maruyama site. Then, at about 4.1 +/- 0.1 cal kyr BP, abrupt marine and terrestrial cooling, indicated by a decrease of about 2 degrees C in the C-37 alkenone SST and an increase in the pollen of taxa of cooler climates, led to a reduced terrestrial food supply, causing the people to abandon the site. The timing of the abandonment is consistent with the timing (around 4.0-4.3 cal kyr BP) of the decline of civilizations in north Mesopotamia and along the Yangtze River. These findings suggest that a temperature rise of similar to 2 degrees C in this century as a result of global warming could have a great impact on the human community and especially on agriculture, despite the advances of contemporary society. (C) 2009 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, 2009年05月, QUATERNARY SCIENCE REVIEWS, 28 (9-10), 964 - 974, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Yui Ishizaki, Ken'ichi Ohkushi, Takashi Ito, Hodaka Kawahata

    An oxygen minimum zone (OMZ) currently exists at intermediate water depths on the northern Japanese margin in the northwestern Pacific. The OMZ results largely from a combination of high surface-water productivity and poor ventilation of intermediate waters. We investigated the late Quaternary history (last 27 kyr) of the intensity of this OMZ using changes in benthic foraminiferal carbon isotopes and assemblages in a sediment core taken on the continental slope off Shimokita Peninsula, northern Japan, at a water depth of 975 m. The core was located well within the region of the present-day OMZ and high surface-water productivity. The benthic foraminiferal delta C-13 values, which indicate millennial-scale fluctuations of nutrient contents at the sediment-water interface, were 0.48aEuro degrees lower during the last glacial maximum (LGM) than during the late Holocene. These results do not indicate the formation of glacial intermediate waters of subarctic Pacific origin, but rather the large contribution of high-nutrient water masses such as the Antarctic Intermediate Water, implying that the regional circulation pattern during the LGM was similar to that of modern times. Benthic foraminiferal assemblages underwent major changes in response to changes in dissolved oxygen concentrations in ocean floor sediments. The lowest oxygen and highest nutrient conditions, marked by dysoxic taxa and negative values of benthic foraminiferal delta C-13, occurred during the Bolling/Allerod (B/A) and Pre-Boreal warming events. Dysoxic conditions in this region during these intervals were possibly caused by high surface-water productivity at times of reduced intermediate-water ventilation in the northwestern Pacific. The benthic assemblages show dysoxic events on approx. 100- to 200-year cycles during the B/A, reflecting centennial-scale productivity changes related to freshwater cycles and surface-water circulation in the North Pacific.

    SPRINGER, 2009年04月, GEO-MARINE LETTERS, 29 (2), 125 - 131, 英語

    [査読有り]

    研究論文(学術雑誌)

  • High-resolution paleoproductivity change in the central region of the Bering Sea since the last glaciation

    Khim, S, Kim, B.-K, Shin, H, Uchida, M, Itaki, T, 大串 健一

    2009年, The Sea, Journal of the Korean Society of Oceanography, vol. 14, no. 3, 134-144

    [査読有り]

    研究論文(学術雑誌)

  • 底生有孔虫骨格の微量元素による最終氷期以降の北西太平洋の変遷-下北半島沖MR01-K03 PC4コアの例-

    木元 克典, 阿波根 直一, 大串 健一, 内田 昌男

    2008年, 月刊地球, 345, 182-188, 日本語

    研究論文(学術雑誌)

  • 最終退氷期の北太平洋における貧酸素イベント ー底生有孔虫群集の解析ー

    大串 健一, 芝原 暁彦

    2008年, 月刊地球, 344, 119-125, 日本語

    研究論文(学術雑誌)

  • 最終退氷期における北西太平洋中深層水循環変動と大気CO2変動

    内田 昌男, 阿波根 直一, 大串 健一

    2008年, 月刊地球, 345, 159-170, 日本語

    研究論文(学術雑誌)

  • Akihiko Shibahara, Ken'ichi Ohkushi, James P. Kennett, Ken Ikehara

    A strong oxygen minimum zone (OMZ) currently exists at upper intermediate water depths on the northern Japanese margin, NW Pacific. The OMZ results largely from a combination of high surface water productivity and poor ventilation of upper intermediate waters. We investigated late Quaternary history ( last 34 kyr) of ocean floor oxygenation and the OMZ using quantitative changes in benthic foraminiferal assemblages in three sediment cores taken from the continental slope off Shimokita Peninsula and Tokachi, northern Japan, at water depths between 975 and 1363 m. These cores are well located within the present-day OMZ, a region of high surface water productivity, and in close proximity to the source region of North Pacific Intermediate Water. Late Quaternary benthic foraminiferal assemblages experienced major changes in response to changes in dissolved oxygen concentration in ocean floor sediments. Foraminiferal assemblages are interpreted to represent three main groups representing oxic, suboxic, and dysoxic conditions. Assemblage changes in all three cores and hence in bottom water oxygenation coincided with late Quaternary climatic episodes, similar to that known for the southern California margin. These episodes, in turn, are correlated with orbital and millennial climate episodes in the Greenland ice core including the last glacial episode, Bolling-Allerod (B/ A), Younger Dryas, Preboreal ( earliest Holocene), early Holocene, and late Holocene. The lowest oxygen conditions, marked by dysoxic taxa and laminated sediments in one core, occurred during the B/ A and the Preboreal intervals. Suboxic taxa dominated mainly during the last glacial, the Younger Dryas, and most of the Holocene. Dysoxic conditions during the B/ A and Preboreal intervals in this region were possibly caused by high surface water productivity at times of reduced intermediate ventilation in the northwestern Pacific. Remarkable similarities are evident in the late Quaternary sequence of benthic foraminiferal assemblage change between the two very distant continental margins of northern Japan and southern California. The oscillations in OMZ strength, reflected by these faunal changes, were widespread and apparently synchronous over wide areas of the North Pacific, reflecting broad changes in intermediate water ventilation and surface ocean productivity closely linked with late Quaternary climate change on millennial and orbital timescales.

    AMER GEOPHYSICAL UNION, 2007年08月, PALEOCEANOGRAPHY, 22 (3), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Radiocarbon marine reservoir in the subarctic region off north Japan during the last deglacial period

    Ohkushi, K, Uchida, M, Aoki, K, Yoneda, M, Ikehara, K, Minoshima, K, Kawahata. H, Tada, R, Murayama, M, Shibata, Y

    2007年, Radiocarbon, 49, 963 - 968

  • Radiocarbon marine reservoir ages in the northwestern Pacific off Hokkaido Island, Japan, during the last deglacial period

    Ken'ichi Ohkushi, Masao Uchida, Kaori Aoki, Minoru Yoneda, Ken Ikehara, Kayo Minoshima, Hodaka Kawahata, Ryuji Tada, Masafumi Murayama, Yasuyuki Shibata

    We measured radiocarbon ages of planktic foraminifera in 4 sediment cores from the northwestern Pacific region off northern Japan in order to estimate marine reservoir ages during the Bolling-Allerod period. The ages of deglacial tephra markers from 2 Japanese source volcanoes identified in these sediment cores had been previously estimated from C-14 ages of terrestrial charcoal and buried forests. By comparing the foraminiferal and tephra ages, we estimated the surface water reservoir age during the Bolling-Allerod period to be similar to 1000 yr or more in the region off northern Japan, The deglacial reservoir ages were more than 200 yr higher than the Holocene values of similar to 800 yr. The older deglacial ages may have been caused by active upwelling of deep water during the last deglaciation and the consequent mixing of "older" deep water with "younger" surface waters.

    UNIV ARIZONA DEPT GEOSCIENCES, 2007年, RADIOCARBON, 49 (2), 963 - 968, 英語

    研究論文(学術雑誌)

  • Radiocarbon marine reservoir ages in the northwestern Pacific off Hokkaido Island, Japan, during the last deglacial period

    Ken'ichi Ohkushi, Masao Uchida, Kaori Aoki, Minoru Yoneda, Ken Ikehara, Kayo Minoshima, Hodaka Kawahata, Ryuji Tada, Masafumi Murayama, Yasuyuki Shibata

    We measured radiocarbon ages of planktic foraminifera in 4 sediment cores from the northwestern Pacific region off northern Japan in order to estimate marine reservoir ages during the Bolling-Allerod period. The ages of deglacial tephra markers from 2 Japanese source volcanoes identified in these sediment cores had been previously estimated from C-14 ages of terrestrial charcoal and buried forests. By comparing the foraminiferal and tephra ages, we estimated the surface water reservoir age during the Bolling-Allerod period to be similar to 1000 yr or more in the region off northern Japan, The deglacial reservoir ages were more than 200 yr higher than the Holocene values of similar to 800 yr. The older deglacial ages may have been caused by active upwelling of deep water during the last deglaciation and the consequent mixing of "older" deep water with "younger" surface waters.

    UNIV ARIZONA DEPT GEOSCIENCES, 2007年, RADIOCARBON, 49 (2), 963 - 968, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Radiocarbon-based carbon source quantification of anomalous isotopic foraminifera in glacial sediments in the western North Pacific

    Masao Uchida, Kenichi Ohkushi, Katsunori Kimoto, Fumio Inagaki, Toyoho Ishimura, Urumu Tsunogai, Takumi TuZino, Yasuyuki Shibata

    2007年, Geochemistry, Geophysics, Geosystems(G-cubed), in press, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Mayumi Hoshiba, Naokazu Ahagon, Ken'ichi Ohkushi, Masao Uchida, Isao Motoyama, Akira Nishimura

    Oxygen and carbon isotopes of foraminifera were analyzed in core PC4, water depth 1366 m, off northern Japan, near the east side of the Tsugaru Strait (130 m depth) between the open northwestern Pacific Ocean and the Japan Sea. At present, the site is at the confluence of the Tsugaru Warm Current which flows eastwards out of the Sea of Japan through the Tsugaru Strait, the subarctic Oyashio Current and the subtropic Kuroshio Current. During the Last Glacial Maximum (LGM), the Oyashio Current penetrated further to the South and outflow from the Japan Sea was restricted by glacio-custatic sea level lowering. The isotopic values of the planktic foraminifer Neogloboquadrina pachyderma (sinistral) and the benthic foraminifer Uvigerina akitaensis reflect rapid millennial-scale paleoceanographic changes between 34 and 6 ka. Hydrographic changes during deglaciation were related to events at high northern latitudes, but Holocene hydrographic changes were dominated by local effects, such as the development of the outflow of the Tsugaru Warm Current. High values of planktic delta O-18 during the LGM reflect the southward advance of the Oyashio Current. These values decreased by 0.3%. from 19.4 to 18.9 ka, then increased by 0.5 parts per thousand at 18 ka, with highest values between 17.5 and 15 ka. The delta O-18 oscillations between 19.4 and 15 ka may reflect millennial-scale warm-cold oscillations during Heinrich event 1. Planktic microfossil data indicate that cold Oyashio waters flowed from the northwestern Pacific into the Japan Sea via the Tsugaru Strait between 17 and 16 ka, consistent with the occurrence of the highest planktic delta O-18 values in core PC4. Planktic delta O-18 values rapidly decreased by 0.9 parts per thousand at 15 ka, possibly reflecting the effects of both a rapid increase in fresh water flux and rising temperatures in the subarctic North Pacific. During the Younger Dryas, cold event planktic delta O-18 values increased by 0.5 parts per thousand, followed by a gradual decrease by 1 parts per thousand from the early to middle Holocene, reflecting a gradual increase in eastward outflow via the Tsugaru Strait with sea level rise. Both planktic and benthic foraminiferal delta C-13 values oscillated between 34 and 10 ka, at relatively large amplitudes (about 0.5 parts per thousand), then remained relatively stable during the last 10 kyr. Several negative planktic and benthic (similar to-0.7 parts per thousand) delta C-13 excursions were present in sediment dated between the precipitation of secondary carbonates during episodic methane release possibly associated with methane release from continental margin sediments. (c) 2006 Elsevier B.V All rights reserved.

    ELSEVIER SCIENCE BV, 2006年12月, MARINE MICROPALEONTOLOGY, 61 (4), 196 - 208, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ken Ikehara, Ken'ichi Ohkushi, Akihiko Shibahara, Mayumi Hoshiba

    The North Pacific Intermediate Water (NPIW), source water (Oyashio Intermediate Water; OYIW) of which originates east of the southern Kuril Islands, plays an important role in the carbon cycle of the Pacific Ocean. The spatio-temporal changes of NPIW, however, have yet to be clarified. Because of OYIW flowing in the Oyashio region, from east of the southern Kuril Islands through south of Hokkaido to east of Honshu, it is important to understand past bottom water changes at intermediate depths of this region for study of the past NPIW. Two sediment cores, GH02-1030 and MD01-2409, were collected from south of eastern and central Hokkaido. Lithology and physical properties of the cores recorded well the surface and bottom water conditions. Higher diatom productivity in the surface waters led to diatomaceous sediments with higher water contents and lower grain densities during the last deglaciation and late Holocene. These lithological changes occurred not only at the two studied cores but also at several other sites along the western margin of the NW Pacific. Benthic foraminiferal assemblages and occurrence of parallel lamination indicated such a dysoxic bottom water condition during the last deglaciation. Absence of lamination in the late Holocene horizon suggested a somewhat higher dissolved oxygen concentration in bottom water than that during the last deglaciation. On the basis of benthic foraminifer assemblages corresponding to strengthening of intermediate water circulation inferred from coarsening of sediment grain size and decreasing of sedimentation rate indicating stronger winnowing effects, it appears that the bottom water oxygen level increased during the Younger Dryas cold period. (C) 2006 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2006年08月, GLOBAL AND PLANETARY CHANGE, 53 (1-2), 78 - 91, 英語

    研究論文(学術雑誌)

  • Kuroyanagi Azumi, Kawahata Hodaka, Narita Hisashi, Ohkushi Ken'ichi, Aramaki Takafumi

    2006年08月, GLOBAL AND PLANETARY CHANGE, 53 (1-2), 92 - 107

    [査読有り]

  • 西太平洋におけるIMAGESコアを用いた高時間解像度の環境復元 浮遊性有孔虫群集と表層水塊の関係に基づく過去2万7千年間の下北沖の古環境変動復元

    黒柳あずみ, 川幡穂高, 大串健一

    2006年03月28日, 化石, (79), 33 - 42, 日本語

  • Kuroyanagi A, Kawahata H, Ohkushi K

    Planktonic foraminiferal assemblage provides the information about water mass properties. We investigate the fossil foraminiferal fauna using factor analysis to reconstruct the changes in water masses and the outflow/inflow timing of the Oyashio and Tsugaru currents across the Tsugaru Strait off Shimokita (41°33.9′N, 141°52.1′E) in the northwestern North Pacific over the last 26,900 years. In the study area, the Oyashio Current affected both surface and subsurface (below the pycnocline) waters during 26.9-15.7 thousand calendar years before present (cal. kyr BP). Vertical mixing and subsurface warming resulted from the flow of the Oyashio Current into the Japan Sea around 15.7-10.6 cal. kyr BP. The Tsugaru Current started to enter into the Pacific about 11.2-10.6 cal. kyr BP and formed two water masses condition of the surface layer under the influence of the Tsugaru and the subsurface layers of the Oyashio Current during 10.6-9.0 cal. kyr BP. The increasing of inflow of the Tsushima/Tsugaru Current enforced surface layer warming and the stratification of water column. Finally, the subsurface layer started to warm at 6.2 cal. kyr BP. The timings of outflow/inflow of the Oyashio and Tsugaru currents in this study are compatible with the results at the Japan Sea sites.

    2006年03月01日, Fossils, (79), 33 - 42

    [査読有り]

  • M Uchida, Y Shibata, K Ohkushi, M Yoneda, K Kawamura, M Morita

    Recent observations show that establishment of molecular-level radiocarbon stratigraphy is increasingly critical for paleoceanographic studies, especially to enable comparable discussion about past ocean and climate changes inferred from multiple proxy records based on lipid biomarkers and calcareous foraminiferal microfossils. So far, although we have interesting evidence that there are temporal and spatial age offsets between the algal "alkenone" biomarker used for SST (sea surface temperature) estimates and planktonic foraminifera in regions with high sedimentation rates, less is known about such age offsets in the settings of lower sedimentation. In this study, to investigate the potential of biomarkers as an alternative dating proxy to foraminifera in a low sedimentation rate setting, we measured radiocarbon ages of 17 different lipid biomarkers [fatty acids (FAs), n-alkanes, and alkenones], bulk total organic matter (TOC), and foraminifera from two sections (12-15 cm, and 21-24 cm, depth) of a surface sediment core in the Northwest Pacific. The sedimentation rate, estimated from the TOC, ranged from 10.5 cm/kyr in the core top to 0.9 cm/kyr in the lower part of the core. The ages of the FAs detected at 12-15 cm depth ranged from 530 yr BP (C-18) to 3250 yr BP (C-28). The C-14 analysis of the FAs could be divided into two groups: FAs (C-16, C-18) derived from marine organisms and those (C-24, C-26, C-28) derived from terrestrial higher plants. The high molecular weight (HMW) FAs' ages were older [2550 yr BP (C-24) to 3250 yr BP (C-28)] than those of the low molecular weight (LMW) FAs [530 yr BP (C-18) to 1820 yr BP (CIA. At 21-24 cm depth, the alkenone ages were 7100-7300 yr younger than those of the planktonic foraminifera. In this horizon, the alkenone C-14 age (7500 yr BP) and the alkenone-estimated SST (15.3 degrees C) suggest that these alkenones were produced in this region during the Holocene. The alkenone C-14 age was also in good agreement with those of the LMW FAs (C-14, iC(15), aiC(15), C-16, and C-18:1) derived from marine plankton and bacteria. Similarly, the TOC age was 5700 yr younger than that of the planktonic foraminifera. These age differences are large compared with those estimated for the horizon at 12-15 cm depth, which was characterized by a relatively higher sedimentation rate. These trends between ages of alkenones, TOC, and planktonic foraminifera are not comparable to the results from sites with high sedimentation rates, such as the Benguella upwelling system [Mollenhauer, G., Eglinton, T.I., Ohkouchi, N., Schneider, R.R., Muller, P.J., Grootes, P.M., et al., 2003. Asynchronous alkenone and foraminifera records from the Benguela upwelling system. Geochim. Cosmochim. Acta 67, 2157-2171] or the Bermuda Rise drift deposit [Ohkouchi, N., Eglinton, T.I., Keigwin, L.D., Hayes, J.M., 2002. Spatial temporal offsets between proxy records in a sediment drift. Science 289, 1224-1227], which are significantly different sedimentary settings from our site. The radiocarbon results from these high sedimentation rate regions suggest that the alkenones are several thousand years older than the coexisting planktonic foraminifera. On the other hand, the age offsets between alkenones and planktonic foraminifera at our site are larger than those from the other sites, and the alketiones are younger than the plank-tonic foraminifera. (c) 2005 Elsevier BV. All rights reserved.

    ELSEVIER SCIENCE BV, 2005年05月, CHEMICAL GEOLOGY, 218 (1-2), 73 - 89, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ken'Ichi Ohkushi, Naokazu Ahagon, Masao Uchida, Yasuyuki Shibata

    We evaluated the influence of methane release from methane hydrate reservoirs in the northwestern Pacific continental margin on stable isotope values. We analyzed stable isotopes of foraminifera from a piston core collected at 1066-m water depth off eastern Hokkaido, northern Japan. Carbon isotope signals indicated that planktonic and benthic foraminifera in several glacial sediment layers in the core were highly depleted in 13C both the planktonic and benthic foraminiferal δ13C values ranged from about-10% to-2%o. Most foraminiferal tests in these horizons were brown as a result of postdepositional alteration. Foraminiferal oxygen isotopes fluctuated abnormally in the glacial sediment layers, showing small (about 0.5%) positive shifts relative to normal glacial values. We attributed the positive shifts to authigenic carbonate formation in the foraminiferal tests. The authigenic carbonates have formed when rising methane, from methane hydrate in the sediment, became oxidized as it came in contact with dissolved sulfate near the seafloor. Episodic methane-release events may be associated with great plate-boundary earthquakes with epicenters near the coring site. Copyright 2005 by the American Geophysical Union.

    2005年04月, Geochemistry, Geophysics, Geosystems, 6 (4), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Masao Uchida, Yasuyuki Shibata, Ken'Ichi Ohkushi, Naokazu Ahagon, Mayumi Hoshiba

    According to recent observations of anomalous bottom-simulating reflections (BSR), the northwest Pacific marginal sediments around Japan main islands bear large abundances of methane hydrate [Satoh, 2002]. During the Last Glacial, direct and indirect evidence accumulated from geochemical data suggests that methane episodically released from hydrate trapped in the seafloor sediments [Dickens et al., 1995 Hinrichs et al., 2003 Kennett et al., 2000]. Here we show that marginal sediments from the western North Pacific contain a hopanoid 17α(H), 21β(H)-hop-22(29)-ene (diploptene) derived from the activity of methanotrophic bacteria in water column and/or surface sediment during a warming period (Interstadial 3) in the Last Glacial. The carbon isotopic compositions of diploptene range between-41.0% and-27.9% (relative to PDB). In the horizon indicative of a contribution of methanotrophic bacteria, foraminiferal isotope signals were also found with highly depleted 13C compositions of planktonic foraminifera (∼-1.9%, PDB) and benthic foraminifera (∼-0.8%, PDB), suggesting indirect records of enhanced incorporation of 13C-depleted CO2 formed by methanotrophic process that use 12C-enriched methane as their main source of carbon. From combined isotopic data of molecular (diploptene) and foraminifera, the most prominent signal of methane release was detected in the sediments deposited around 25.4 cal. kyr BP (∼100 year time span), corresponding to the Interstadial 3. This is the first evidence of methane hydrate instability in the open western North Pacific during the Last Glacial. Considering the glacial-interglacial hydrographic conditions in this region, the instability of methane hydrate may be modulated by intermediate water warming and/or the lowering of sea level. Our results suggest that the western North Pacific marginal regions may be a profound effect on rapid global warming climate changes during the Last Glacial. Copyright 2004 by the American Geophysical Union.

    2004年08月, Geochemistry, Geophysics, Geosystems, 5 (8), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ken'ichi Ohkushi, Masao Uchida, Naokazu Ahagon, Toshiaki Mishima, Toshiya Kanematsu

    14C ages of benthic foraminifera and planktonic foraminifera in sediment core PC4 (41°07.10′N, 142°24.17 ′E) collected from the northwestern Pacific were measured by accelerator mass spectrometry. The purpose of this study was to investigate the changes in intermediate water ventilation in the northwestern Pacific during the last glacial period. We used age differences between benthic foraminifera and planktonic foraminifera from the same sediment horizons to estimate the ventilation time of intermediate water. Planktonic 14C ages show that the core recorded paleoenvironmental changes during the last 35 kyr. Glacial benthic-planktonic age differences were smaller in the early deglacial period (15000-17000 calyrBP) than in the period (19000-30000 calyrBP) before and during the last glacial maximum. The results at intermediate depths are consistent with those from a Pacific deep-water site. © 2004 Elsevier B.V. All rights reserved.

    2004年08月, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 223-224, 460 - 465, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Naokazu Ahagon, Ken'ichi Ohkushi, Masao Uchida, Toshiaki Mishima

    Sediment cores (MR01-K03 PC4/PC5, 1366 m water depth) collected from off northern Japan were studied using coexisting planktonic and benthic foraminiferal radiocarbon measurements to reconstruct the history of mid-depth circulation in the northwest Pacific. Reconstructed ventilation ages indicate that, consistent with data from a previous radiocarbon study at a shallower site, there was significant variation in mid-depth circulation during the last deglaciation, especially in the Bøolling-Allerøod (13-15 ka) and Younger Dryas (11.5-13 ka) intervals. Our record indicates that the ventilation changes in the North Pacific were antiphase to those of the North Atlantic, suggesting that atmospheric moisture transport associated with the Asian Monsoon might have played a great role in millennium-scale ventilation changes in the North Pacific during the last deglaciation. Copyright 2003 by the American Geophysical Union.

    American Geophysical Union, 2003年11月01日, Geophysical Research Letters, 30 (21), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ken'ichi Ohkushi, Atsushi Suzuki, Hodaka Kawahata, Lallan P. Gupta

    Oxygen and carbon isotope values of single benthic foraminiferal tests in a core from the Shatsky Rise, NW Pacific Ocean, show greater intra-horizon variance during the Holocene than during the Last Glacial Maximum (LGM). This greater variance is caused by the introduction of glacial specimens some 20 cm upward from their original deposition layer due to bioturbation. In contrast, foraminiferal populations belonging to glacial layers do not include Holocene specimens. The difference in direction of bioturbation greatly modifies climate information in horizons formed during and after deglacial events. After omitting glacial specimens from Holocene sediments, the glacial-interglacial difference in δ18O suggests that Pacific deep-water temperature changed by 2.4-3.8°C at the most. The δ13C values suggest that nutrient concentration was higher during the LGM than the Holocene. The glacial deep North Pacific Ocean apparently was influenced by cold deep waters of southern origin. © 2003 Elsevier Science B.V. All rights reserved.

    Elsevier B.V., 2003年, Marine Micropaleontology, 48 (3-4), 281 - 290, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Compound-specific radiocarbon ages of fatty acids in marine sediments from the western North Pacific

    Uchida M, Shibata Y, Kawamura K, Kumamoto Y, Yoneda M, Ohkushi K, Harada N, Hirota M, Mukai H, Tanaka A, Kusakabe M, Morita M

    2001年, Radiocarbon, 43 (2B), 949 - 956

    [査読有り]

  • Hodaka Kawahata, Ken-Ichi Ohkushi, Yasufusa Hatakeyama

    Middle latitudes of the northern and southern hemispheres of the western Pacific are the sensitive areas for the climatic change. We reconstruct the variation in primary productivity to evaluate the shift of the transition zone between the central water mass and cold water in the both hemispheres. In cores S2612 and LH3166, which are located around boreal and austral 35 degree, the mean C(Organic)/N atomic ratios are 7.8 and 7.2, respectively. Therefore it is suggested that organic matter is mainly of marine origin (excluding the middle Stage 6 to Stage 7 with the high C(Organic)/N atomic ratios in core LH3166). Primary productivities estimated from these cores in the middle latitudes of the western Pacific during the late Pleistocene demonstrate similar profiles. Maxima are observed at late Stage 2, late Stage 4 (middle Stage 4 for L3187) and late Stage 6 while minimum values were observed at Stage 5. Mass accumulation rates of organic carbon and biogenic opal also show similar profiles in these cores. These results and paleontological evidence show that the transition zone between Subtropical and subarctic waters almost synchronously migrated along the latitudinal transection during the last 150 kyr.

    1999年12月, Journal of Oceanography, 55 (6), 747 - 761, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ken'Ichi Ohkushi, Ellen Thomas, Hodaka Kawahata

    Benthic foraminifera in a gravity core from Shatsky Rise (northwestern Pacific, water depth 2612 m) show large fluctuations in accumulation rate, species composition and diversity over the last 298 kyr. The most important fluctuations (explaining more than 90% of the faunal variance) result from variations in relative abundance of the three most abundant species: Epistominella exigua, Alabaminella weddellensis and Uvigerina peregrina. High accumulation rates of U. peregrina, a species linked to high, continuous productivity, occurred with a 100 kyr periodicity at the end of glacial stages, and correspond to high mass accumulation rates of organic carbon. Peak accumulation rates of E. exigua occurred during glacial stage 4 and the middle part of glacial stages 8 and 6, whereas A. weddellensis was dominant in the early part of stages 8 and 6, and the late part of stage 3. A high abundance of these species probably indicates lower overall productivity than a high abundance of U. peregrina, and their relative and absolute abundances may be linked not simply to the amount of organic matter delivered to the sea floor, but to the intermittent delivery of fresh, easily degraded organic matter. The overall species diversity is negatively correlated to the relative abundance of E. exigua, but not to that of A. weddellensis, implying that these species have different environmental preferences, although both have been linked to periodic phytodetritus deposition in the present oceans.

    1999年01月, Marine Micropaleontology, 38 (2), 119 - 147, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ken'ichi Ohkushi, Takuya Itaki, Naoki Nemoto

    The modern North Pacific is the terminus for deep-water circulation. While no deep-water mass is formed today, the region is the source of North Pacific Intermediate Water (300-800 m) formed primarily in the Sea of Okhotsk. However, the source and strength of intermediate-water in the glacial North Pacific was likely different from the present intermediate-water. Here we present microfossil evidence of Late Quaternary ventilation changes associated with changes in intermediate-water. Intermediate-water ventilation decreased drastically at the glacial termination when it switched to the modern circulation system. The ventilation change appears to have been widespread and synchronous in the North Pacific. Glacial microfossil assemblages indicate that there was relatively strong ventilation of intermediate-water, which seems to have been cold and well-oxygenated as if produced by brine rejection during the formation of sea ice. On the basis of the glacial distribution of microfossils in the North Pacific, we suggest that intermediate-water was derived from the Bering Sea during the glacials, rather than the Sea of Okhotsk. © 2003 Elsevier Science Ltd. All rights reserved.

    2003年06月, Quaternary Science Reviews, 22 (14), 1477 - 1484

    研究論文(学術雑誌)

  • 大串 健一

    The Sedimentological Society of Japan, 2001年, 堆積学研究, 53 (53), 163 - 166

  • 大串 健一, 鈴木 淳, 川幡 穂高, Gupta Lallan P.

    日本地質学会, 2000年, 日本地質学会学術大会講演要旨, 2000, 221 - 221, 日本語

  • 宮崎平野における喜界アカホヤテフラ降下前後の環境変化ーMIKコアの解析結果に基づいてー

    桒畑光博, 杉山真二, 中西利典, 足立達朗, 田尻義了, 下山正一, 山口龍彦, 大串健一, 七山 太

    2021年05月, 号外地球, (70), 89 - 99

    論文集(書籍)内論文

MISC

  • いろいろな元素からみえる千種川水系の姿

    藤吉 麗, 陀安 一郎, 藪崎 志穂, 原口 岳, 由水 千景, 大串健一, 古川文美子, 伊藤真之, 山本雄大, 横山 正

    2019年03月, 共生のひろば 14号, (4), 115, 日本語

    会議報告等

  • 芝原暁彦「様々な化石の特徴、発掘方法、新しい調べ方がわかる 化石観察入門」成文堂新光社

    大串 健一

    2014年11月, 地学教育, 67 (3), 124, 日本語

    書評論文,書評,文献紹介等

  • 有孔虫から海洋環境の変遷をさぐる

    根本 直樹, 大河原 にい菜, 大串 健一

    2008年, 地学団体研究会, 地球科学, 62巻 6号,(409頁~414頁), 日本語

    [査読有り]

    記事・総説・解説・論説等(学術雑誌)

  • High-resolution paleo-environmental changes in the Northwestern Pacific during the late Quaternary

    Y Ishizaki, H Kawahata, K Ohkushi

    PERGAMON-ELSEVIER SCIENCE LTD, 2003年09月, GEOCHIMICA ET COSMOCHIMICA ACTA, 67 (18), A175 - A175, 英語

    研究発表ペーパー・要旨(国際会議)

  • O-96 浮遊性有孔虫群集に基づく北西部北太平洋の古環境復元

    黒柳 あずみ, 川幡 穂高, 大串 健一, 成田 尚史, 南 秀樹, 干場 真弓

    一般社団法人 日本地質学会, 2003年, 日本地質学会学術大会講演要旨, 2003 (0), 日本語

  • 大串 健一, 根本 直樹, 村山 雅史, 中村 俊夫, 塚脇 真二

    2本の海底コア中の底生有孔虫群集に基づいて,過去約2万年間の親潮域における海洋環境を推定した.襟裳岬沖のST-5コア(水深2,098m)および釧路沖のST-21コア(水深1,083m)の底生有孔虫群集は,いずれも最終氷期から完新世への過渡期に著しい変化を示す.ST-5コアの最終氷期の群集が,現在の黒潮-親潮混合水域における水深2,000m付近のそれと類似することから,襟裳岬沖の深層水は最終氷期から現在まで変化しなかったと考えられる.しかし,完新世には海洋表層の生物生産が高くなったため,海底で有孔虫殻の選択的溶解が起こり,完新世の群集組成は大きく変化したと判断される.一方,ST-21コアの最終氷期の群集で<i>Epistominella pacifica</i>が優勢であることから,釧路沖の水深1,000m付近では北方起源の中層水の影響が最終氷期に強かったと示唆される.しかし,完新世前期には現在に近い低酸素で栄養塩に富んだ親潮中層水が成立し,中期に溶存酸素量は一時的に上昇するものの,後期になると再び低酸素で栄養塩に富んだ中層環境が存在したと推定される.

    日本第四紀学会, 2000年10月01日, 第四紀研究, 39 (5), 427 - 438, 日本語

  • 兵庫県千種川流域における硝酸イオンおよび硫酸イオンの季節的動態の比較

    藤吉麗, 陀安一郎, 藪崎志穂, 原口岳, 由水千景, 大串健一, 古川文美子, 伊藤真之, 山本雄大, 横山正, 三橋弘宗

    2020年, 日本生態学会大会講演要旨(Web), 67th

  • 安定同位体比を用いた兵庫県千種川流域における硫酸,硝酸イオンの起源と動態研究

    藤吉麗, 陀安一郎, 薮崎志穂, 原口岳, 由水千景, 大串健一, 古川文美子, 伊藤真之, 山本雄大, 横山正, 三橋弘宗

    2019年, 日本生態学会大会講演要旨(Web), 66th

  • 安定同位体比を用いた兵庫県千種川流域における硫酸イオンおよび硝酸イオンの起源と動態の研究

    藤吉麗, 陀安一郎, 藪崎志穂, 原口岳, 由水千景, 大串健一, 古川文美子, 伊藤真之, 山本雄大, 横山正, 三橋弘宗

    2018年, 日本陸水学会大会講演要旨集, 83rd

  • 硫酸イオンの硫黄安定同位体比および硝酸イオンの窒素・酸素安定同位体比を用いた兵庫県千種川流域における溶存イオンの動態研究

    藤吉麗, 大串健一, 山本雄大, 陀安一郎, 横山正, 三橋弘宗, 古川文美子, 伊藤真之

    2018年, 日本地球惑星科学連合大会予稿集(Web), 2018

  • 千種川流域の環境教育に寄与する水環境マップ作成の試み

    大串健一, 伊藤真之, 山本雄大, 陀安一郎, 藪崎志穂, 藤吉麗, 横山正, 三橋弘宗

    2017年, 全国地学教育研究大会・日本地学教育学会全国大会講演予稿集, 2017-71st

  • 最終退氷期以降の北西太平洋における底生有孔虫のOMZ変動に対する生物応答

    酒井恵祐, 大串健一, 芝原暁彦

    2020年, 日本第四紀学会講演要旨集, 50 (CD-ROM)

  • 兵庫県千種川の水質に関する地球化学的研究

    山本雄大, 陀安一郎, 中野孝教, 角皆潤, 中川書子, 横山正, 三橋弘宗, SHIN Ki-Cheol, 藪崎志穂, 太田民久, 大串健一

    2017年, 日本地球惑星科学連合大会予稿集(Web), 2017

書籍等出版物

  • キーワード 人間と発達

    大串 健一

    共著, 大学教育出版, 2006年, 日本語

    学術書

講演・口頭発表等

  • 最終退氷期以降の北西太平洋における底生有孔虫のOMZ変動に対する生物応答

    酒井恵祐, 大串健一, 芝原暁彦

    日本第四紀学会2020年大会, 2020年12月

    ポスター発表

  • 苫小牧沖における最終退氷期以降の底生有孔虫群集と溶存酸素極小層(OMZ)の変動

    酒井恵祐, 大串健一, 芝原暁彦

    日本地球化学会第67回年会, 2020年11月

    ポスター発表

  • Analysis from Benthic foraminifera populations of expansion and intensify of the northwestern Pacific oxygen minimum zone during the last deglaciation

    Keisuke Sakai, Ken'ichi Ohkushi, Akihiko Shibahara

    JpGU - AGU Joint Meeting 2020, 2020年05月

    ポスター発表

  • 兵庫県千種川流域における硝酸イオンおよび硫酸イオンの季節的動態の比較

    藤吉 麗、陀安 一郎、藪崎 志穂、 原口 岳、由水 千景、大串 健一、古川 文美子、伊藤 真之、山本 雄大、横山 正、三橋 弘宗

    第67回日本生態学会大会, 2020年03月

    口頭発表(一般)

  • 有孔虫分析により明らかになった最終退氷期における北 西太平洋の溶存酸素極小層(OMZ)の拡大

    酒井恵祐・大串健一・芝原暁彦

    日本古生物学会 第169回例会, 2020年02月08日

    ポスター発表

  • クック諸島ラロトンガ島カレカレ湿原の 海成堆積物から得られた巻貝と有孔虫化石についての予察的研究

    酒井恵祐・大串健一・藤木利之・奥野充・ 森脇広・河合渓・中村俊夫

    国際火山噴火史情報研究集会 EHAI 2019-, 2020年01月25日

    口頭発表(一般)

  • 北海道苫小牧沖海底堆積物の底生有孔虫群集から明らかになった Bølling / Ållerød温暖期の急激な海底貧酸素化

    酒井恵祐・大串健一・芝原暁彦

    国際火山噴火史情報研究集会 EHAI 2019-2, 2020年01月25日

    口頭発表(一般)

  • 兵庫県千種川流域における 硝酸イオンおよび硫酸イオンの 季節的動態の比較

    藤吉 麗、陀安 一郎、藪崎 志穂、 原口 岳、由水 千景、大串 健一、古川 文美子、伊藤 真之、山本 雄大、横山 正、三橋 弘宗

    第10回同位体環境学シンポジウム, 2019年12月20日

    ポスター発表

  • 兵庫県千種川河川水および流域の降水の酸素・水素安定同位体比の特徴

    八杉和輝, 陀安一郎,藪崎志穂,大串健一,横山正,三橋弘宗,藤吉麗,古川文美子,伊藤真之

    第9回 同位体環境学シンポジウム, 2019年12月20日

    ポスター発表

  • Dynamics of sulfate and nitrate inferred from stable isotope techniquesin Chikusa river watershed, Hyogo Prefecture

    Lei Fujiyoshi, Ichiro Tayasu, Shiho Yabusaki, Takashi F. Haraguchi, Chikage Yoshimizu ,Kenichi Ohkushi, Fumiko Furukawa, Masayuki Itoh, Yudai Yamamoto, Tadashi Yokoyama, Hiromune Mitsuhashi

    日本地球惑星科学連合2019年大会, 2019年05月

    口頭発表(一般)

  • The hydrogen and oxygen isotopic compositions of water in the Chikusa River

    Ken'ichi Ohkushi, Shiho Yabusaki, Ichiro Tayasu, Lei Fujiyoshi, Takanori Nakano, Ki-Cheol Shin, Tadashi Yokoyama, Hiromune Mitsuhashi, Masayuki Itoh, Kazuki Yasugi

    JpGU Meeting 2019, 2019年05月

    口頭発表(一般)

  • 安定同位体比を用いた兵庫県千種川流域における 硫酸、硝酸イオンの起源と動態研究

    藤吉 麗, 陀安 一郎, 藪崎 志穂, 原口 岳, 由水 千景, 大串 健一, 古川 文美子, 伊藤 真之, 山本 雄大, 横山 正, 三橋 弘宗

    第66回日本生態学会大会, 2019年03月, 日本語, 神戸国際会議場, 国内会議

    ポスター発表

  • いろいろな元素からみえる千種川水系の姿

    藤吉 麗, 陀安 一郎, 藪崎 志穂, 原口 岳, 由水 千景, 大串健一, 古川文美子, 伊藤真之, 山本雄大, 横山 正

    第14回共生のひろば, 2019年02月, 日本語, 三田, 国内会議

    ポスター発表

  • 千種川の水素・酸素同位体比の特徴

    大串健一, 陀安一郎, 藪崎 志穂, 藤吉 麗, 申 基澈, 横山 正, 三橋弘宗, 八杉 和輝, 古川 文美子, 伊藤 真之

    第8回同位体環境学シンポジウム, 2018年12月, 日本語, 京都, 国内会議

    ポスター発表

  • 安定同位体比を用いた千種川流域における 硫酸イオンおよび硝酸イオンの起源と動態の研究

    藤吉 麗, 陀安 一郎, 藪崎 志穂, 原口 岳, 由水 千景, 大串 健一, 古川 文美子, 山本 雄大, 伊藤 真之, 横山 正, 三橋 弘宗

    同位体環境学シンポジウム, 2018年12月, 日本語, 総合地球環境学研究所(京都), 国内会議

    ポスター発表

  • 安定同位体比を用いた兵庫県千種川流域における硫酸イオンおよび 硝酸イオンの起源と動態の研究

    藤吉 麗, 陀安 一郎, 薮崎 志穂, 原口 岳, 由水 千景, 大串 健一, 古川 文美子, 伊藤 真之, 山本 雄大, 横山 正, 三橋 弘宗

    日本陸水学会第83回大会, 2018年10月, 日本語, 岡山大学, 国内会議

    ポスター発表

  • 硫酸イオンの硫黄安定同位体比および 硝酸イオンの窒素・酸素安定同位体比を用いた 兵庫県千種川流域における溶存イオンの動態研究

    藤吉 麗, 大串 健一, 山本 雄大, 陀安 一郎, 横山 正, 三橋 弘宗, 古川 文美子, 伊藤 真之

    日本地球惑星科学連合2018年大会, 2018年05月, 日本語, 幕張メッセ, 国内会議

    口頭発表(一般)

  • 兵庫県千種川における水安定同位体比の特徴

    大串健一, 陀安一郎, 藪崎 志穂, 藤吉 麗, 山本雄大, 中野 孝教, 申 基澈, 横山 正, 三橋弘宗, 伊藤真之

    日本地球惑星科学連合2018年大会, 2018年05月, 日本語, 幕張, 国内会議

    ポスター発表

  • 千種川流域における溶存イオンの起源と動態

    藤吉 麗, 大串健一, 山本雄大, 陀安一郎, 横山 正, 三橋弘宗, 古川文美子, 伊藤真之

    第13回共生のひろば, 2018年02月, 日本語, 三田, 国内会議

    ポスター発表

  • 兵庫県千種川における硫酸イオンの硫黄安定同位体比の空間分布

    藤吉 麗, 大串 健一, 山本雄大, 陀安一郎, 横山 正, 三橋 弘宗, 古川文美子, 伊藤真之

    同位体環境学シンポジウム, 2017年12月, 日本語, 総合地球環境学研究所(京都), 国内会議

    ポスター発表

  • 兵庫県千種川における硫酸イオンの硫黄安定同位体比の空間分布

    藤吉 麗, 大串健一, 陀安一郎, 横山 正, 三橋弘宗, 古川文美子, 伊藤真之

    第7回同位体環境学シンポジウム, 2017年12月, 日本語, 京都, 国内会議

    ポスター発表

  • 千種川の水素・酸素同位体比 ー2017年8月の結果

    大串健一, 陀安一郎, 藪崎志穂, 藤吉 麗, 申 基澈, 横山 正, 三橋弘宗, 古川文美子, 伊藤真之

    第7回同位体環境学シンポジウム, 2017年12月, 日本語, 京都, 国内会議

    ポスター発表

  • 兵庫県千種川流域の環境教育に寄与する水環境マップ作成の試み

    大串健一, 伊藤真之, 山本雄大, 陀安一郎, 藪崎志穂, 藤吉 麗, 横山 正, 三橋弘宗

    日本地学教育学会第71回全国大会, 2017年09月, 日本語, 神戸, 国内会議

    ポスター発表

  • 兵庫県千種川の水質に関する地球化学的研究

    山本雄大, 陀安一郎, 中野孝教, 角皆潤, 中川書子, 横山 正, 三橋弘宗, SHIN Ki-Cheol, 藪崎志穂, 太田民久, 大串健一

    JpGU-AGU Joint Meeting 2017, 2017年05月, 日本語, 幕張, 国内会議

    ポスター発表

  • 兵庫県千種川の水質に関する地球化学的研究

    山本雄大, 陀安一郎, 中野孝教, 横山 正, 申 基澈, 藪崎志穂, 太田民久, 三橋弘宗, 大串 健一, 藤澤未雪, 伊藤 真之, 蛯名 邦禎

    同位体環境学シンポジウム, 2016年12月, 日本語, 京都, 国内会議

    ポスター発表

  • 兵庫県千種川の水質と安定同位体の特徴

    大串健一, 中野孝教, 陀安一郎, 横山 正, 太田民久, 草野由貴子, 三橋弘宗, 伊藤真之, 蛯名邦禎

    日本地球惑星科学連合2016年大会, 2016年05月, 日本語, 千葉, 国内会議

    ポスター発表

  • 兵庫県千種川流域圏における水環境マップ作成(予報)

    大串 健一, 中野 孝教, 陀安 一郎, 横山 正, 三橋 弘宗, 草野 由貴子, 太田 民久, 野村 麻衣, 伊藤 真之, 蛯名 邦禎

    第5回 同位体環境学シンポジウム, 2015年12月, 日本語, 京都, 国内会議

    ポスター発表

  • 北海道苫小牧沖における過去16000 年間の古海洋環境変遷に関する研究

    原 尚樹, 瀬戸口貴志, 大串 健一, 池原 実, 阿波根直一

    2014年度古海洋シンポジウム, 2015年01月, 日本語, 国内会議

    ポスター発表

  • 北海道苫小牧沖で得られたコアの有孔虫酸素同位体比に基づく古海洋環境変遷

    原 尚樹, 瀬戸口貴志, 大串 健一, 池原 実, 阿波根直一

    日本古生物学会第 164 回例会, 2015年01月, 日本語, 愛知県, 国内会議

    口頭発表(一般)

  • 2011年東北地方太平洋沖地震による津波堆積物中の有孔 虫・粒度組成―久慈市、東松島市・石巻市の事例

    瀬尾菜々美, 大串 健一

    日本古生物学会例会, 2014年01月, 日本語, 兵庫県立人と自然の博物館, 国内会議

    ポスター発表

  • 有孔虫酸素同位体比に基づ く最終氷期以降の北海道沖の海洋環境変遷

    瀬戸口貴志, 大串 健一, 池原 実, 内田昌男, 阿波根直一

    日本古生物学会例会, 2014年01月, 日本語, 兵庫県立人と自然の博物館, 国内会議

    ポスター発表

  • 最終退氷期の北太平洋 における溶存酸素極小層の発達 -底生有孔虫群集の解析-

    大串 健一, 岩本綾音, 竜田泰行, 野村慎也, 阿波 根直一, 内田昌男, 本山 功

    日本古生物学会2013年年会, 2013年06月, 日本語, 熊本大学, 国内会議

    口頭発表(一般)

  • 有孔虫解析に基づくコスタリカ沖東太平洋の第四紀海洋環境変動

    大串 健一, 大音香織, 岩永朋子, 池原 実

    日本古生物学会, 2013年01月, 日本語, 横浜国立大学, 国内会議

    口頭発表(一般)

  • 北極海チュクチライズ海底堆積物コアの磁気層序

    登日 真里奈, 大串 健一, 杉崎 彩子, 兵頭 政幸

    地球電磁気・地球惑星圏学会第132回総会・講演会, 2012年10月, 日本語, 地球電磁気・地球惑星圏学会, 札幌コンベンションセンター, 国内会議

    ポスター発表

  • IODP-CRISPプロジェクトによりコスタリカ沖東太平洋から採取された掘削コアの古海洋学研究

    大串 健一, 大音香織, 岩永朋子, Vannucchi Paola, 氏家恒太郎, IODP Expeditio, Scientific Party

    日本地質学会, 2012年09月, 日本語, 大阪府立大学, 国内会議

    口頭発表(一般)

  • 北極海チュクチライズ海底堆積物コアの磁気層序に関する予察的研究

    登日 真里奈, 大串 健一, 杉崎 彩子, 兵頭 政幸

    日本地球惑星科学連合2012年大会, 2012年05月, 日本語, 日本地球惑星科学連合, 幕張メッセ, 国内会議

    ポスター発表

  • IODP Expedition 334 の古海洋学研究の予察的結果

    大串 健一, Paola Vannucchi, Kohtaro UJIIE, IODP Expeditio, Scientific Party

    日本地球惑星科学連合大会, 2012年05月, 日本語, 幕張メッセ, 国内会議

    ポスター発表

  • Changes in chemical compositions of sea-salt collected at Mt. Rokko

    Shohei Mukai, 大串 健一

    International symposium on aerosol studies explored by electron microscopy, 2012年02月, 英語, 気象研究所, 国際会議

    ポスター発表

  • 六甲山における海塩粒子における化学組成変化

    向井 将平, 大串 健一

    2011年度大気環境学会近畿支部研究発表会, 2012年01月, 日本語, 国内会議

    口頭発表(一般)

  • 夏季の六甲山におけるエアロゾルの個別粒子分析

    向井 将平, 大串 健一

    神戸大学若手フロンティア研究会, 2011年12月, 日本語, 神戸大学, 国内会議

    ポスター発表

  • 夏季と冬季に六甲山で採取したエアロゾルの個別粒子分析

    向井 将平, 大串 健一

    第28 回エアロゾル科学・技術研究討論会, 2011年08月, 日本語, 大阪府立大学, 国内会議

    ポスター発表

  • Spatial scaling of deglacial hypoxia in the Santa Barbara Basin: Using rank-abundance curves and kurtosis to understand paleoecological community stress

    Myhre, S, Hill, T M, 大串 健一, Kennett JP, Behl, R J

    AGU Fall Meteting, 2011年, 英語, San Francisco, 国際会議

    ポスター発表

  • Paleoceanographic changes in the subarctic Northwest Pacific during the last deglaciation

    Boo-Keun Khim, Ikehara, K, Sagawa, T, 大串 健一, Shibahara, A, Yamamoto, M

    Kochi International Symposium on Paleoceanography and Paleoenvironment in East Asia, 2011年, 英語, 高知大学, 国際会議

    ポスター発表

  • Accelerated subduction erosion opposite the Cocos Ridge: Implications for the initiation of ridge subduction

    Sak, P.B, Vannucchi, P, 大串 健一, Ujiie, K, IOD, Scientific Party

    AGU Fall Meeting, 2011年, 英語, San Francisco, 国際会議

    ポスター発表

  • Constraining the vertical movement of OMZ waters in Santa Barbara Basin for the past 15 ky

    Myhre, S, Hill, T. M, Kennett, J.P, Behl, R.J, 大串 健一

    AGU Fall Meeting 2010, 2010年12月, 英語, San Fransicso, 国際会議

    ポスター発表

  • 2009年北極海における海氷および生物地理学における植物プランクトン群集およびサイズ変化について

    今野 進, 大串 健一, 西野 茂人, Jordan R

    Blue Earth’10, 2010年03月, 日本語, 東京海洋大学, 国内会議

    ポスター発表

  • 最終氷期から完新世にかけての北海道南東沖の海洋環境変動

    大串 健一, 池原 実, 内田 昌男, 阿波根 直一, 木元 克典

    平成21年度高知大学海洋コア総合研究センター大学全国共同利用研究成果発表会, 2010年01月, 日本語, 東京大学, 国内会議

    口頭発表(一般)

  • , Investigating a transect of anoxic waters in the Santa Barbara Basin during the past 15 ka

    Myhre, S, Hill, T. M, Kennett, J.P, Behl, R.J, 大串 健一

    AGU Fall Meeting 2009, 2009年12月, 英語, San Francisco, 国際会議

    ポスター発表

  • 苫小牧沖海底コアの解析に基づく最終氷期以降の環境変動

    大串 健一, 池原 実, 内田 昌男, 阿波根 直一, 木元 克典

    平成20年度高知大学海洋コア総合研究センター全国共同利用研究成果発表会, 2009年01月, 日本語, 東京大学, 国内会議

    口頭発表(一般)

  • 有孔虫からみた大阪湾の環境変遷

    大串 健一

    六甲山・大阪湾周辺の地域環境を考える, 2008年03月, 日本語, 神戸大学, 神戸, 国内会議

    口頭発表(一般)

  • 後期更新世のベーリング海グリーンベルトにおける生物地球化学サイクル:

    板木 拓也, 内田 昌男, KHIM Boo-Keun, KIM Sunghan, Shin Hyeson, 香月 香太, 大串 健一, 多田 隆治

    Blue Earth '08, 2008年03月, 日本語, 海洋研究開発機構, 横浜, 国内会議

    口頭発表(一般)

  • ベーリング海大陸棚南部における完新世の海洋環境変動と大気循環との相互関係 -MR06-04 航海

    香月 興太, KHIM Boo-Keun, 板木 拓也, 原田 尚美, 大串 健一, 酒井 英夫, 池田 知将

    Blue Earth '08, 2008年03月, 日本語, 海洋研究開発機構, 横浜, 国内会議

    ポスター発表

  • Geochemical evidence for millenial-scale variation of intermediate water intensity in the Bering Sea during the last glacial-interglacial cycles-.

    Rella, S, Tada, R, Nagashima, K, Uchida, M, Itaki, T, 大串 健一, Harada, N

    第11回みらいシンポジウム, 2008年, 英語, 横浜, 国内会議

    ポスター発表

  • 最終退氷期の苫小牧沖における海洋変動― 有孔虫同位体比に基づく解析 ―

    大串 健一, 池原 実, 内田 昌男, 木元 克典, 芝原 暁彦, 本山 功

    海洋コア総合研究センター全国共同利用研究成果発表会, 2008年01月, 日本語, 海洋コア総合研究センター, 高知, 国内会議

    口頭発表(一般)

  • Millennial-Scale Variation of Intermediate Water Intensity in the Bering Sea During the Last Glacial-Interglacial Cycle

    RELLA StephanO, TADA RyujiO, UCHIDA MasaoO, NAGASHIMA KanaO, ITAKI TakuyaO, OOKUSHI Kenichi

    Fall Meeting, 2007年12月, 英語, American Geophysical Union, San Francisco, CA, USA, 国際会議

    口頭発表(一般)

  • Linkage between human activity and environments during the mid-Holocene Hypsithermal climatic interval - Changes in human activity at the Sannai-Maruyama ruins in Japan -

    KAWAHATA HodakaO, YAMAMOTO HisashiO, OOKUSHI Kenichi, YOKOYAMA YusukeO, KIMOTO KatsunoriO, YAMAOKA KyokoO

    2007 Fall Meeting, 2007年12月, 英語, American Geophysical Union, San Francisco, CA, USA, 国際会議

    ポスター発表

  • Anti-phase variability of North Pacific ventilation and Atlantic overturning circulation during the last deglaciation

    UCHIDA MasaoO, OOKUSHI Kenichi, KENNETT JamesO, EGLINTON TimO, KIMOTO KatsunoriO

    Fall Meeting, 2007年12月, 英語, American Geophysical Union, San Francisco, CA, USA, 国際会議

    口頭発表(一般)

  • High-resolution radiolarian analysis for

    ITAKI TakuyaO, KHIM Boo-KeunO, KIM SunghanO, UCHIDA MasaoO, KATSUKI KotaO, OOKUSHI Kenichi, NAGASHIMA KanaO, RELLA StephanO, TADA Ryuji O

    International Symposium on Quaternary Environmental, 2007年11月, 英語, 日本第四紀学会, Tsukuba, Japan, 国際会議

    口頭発表(一般)

  • Climate – ocean linkage of Holocene on the

    KATSUKI KotaO, KHIM Boo-KeunO, ITAKI TakuyaO, HARADA NaomiO, OOKUSHI Kenichi, SAKAI HideoO, IKEDA TomoyukiO

    International Symposium on Quaternary Environmental, 2007年11月, 英語, 日本第四紀学会, Tsukuba, Japan, 国際会議

    ポスター発表

  • Multi-centuries Scales Sea Surface Environmental Change

    KATSUKI KotaO, KHIM Boo-KeunO, ITAKI TakuyaO, HARADA NaomiO, OOKUSHI Kenichi, SAKAI HideoO, IKEDA TomoshiO

    9th International Conference on Paleoceanography, 2007年09月, 英語, Tongji University, Shanghai, China, 国際会議

    ポスター発表

  • サンタバーバラ海盆における過去3万年間の溶存酸素極小層の変遷ー底生有孔虫群集の解析ー

    大串 健一

    日本第四紀学会, 2007年08月, 日本語, 神戸, 国内会議

    ポスター発表

  • Mid to deep-depth ocean circulation in the western North Pacific during the last glacial maximum- deglacial transition period: evidence from foraminiferal radiocarbon age

    UCHIDA Masao, OOKUSHI Kenichi, KIMOTO Katsunori

    EGU General Assembly, 2007年04月, 英語, European Geosciences Union, Vienna, Austria, 国際会議

    ポスター発表

  • 最終氷期以降の北太平洋における溶存酸素極小層の変遷ー底生有孔虫群集の解析ー

    大串 健一, 芝原 暁彦, James P, Kennett, Tessa Hill, 池原 研

    日本地質学会, 2006年09月, 日本語, 高知, 国内会議

    口頭発表(一般)

  • Millennial-scale paleoceanographic changes off Shimokita Peninsula since the Last Glacial Maximum

    大串 健一, 内田 昌男, 芝原 暁彦, 干場 真弓, 池原 研, 米田 穣, 柴田 康行

    日本地球惑星科学連合大会, 2006年05月, 日本語, 幕張, 国内会議

    口頭発表(一般)

  • 放射性炭素年代測定に基づく深海堆積物の堆積年代−−堆積物粒子の攪拌の影響について−−

    大串 健一, 内田 昌男, 池原 研, 米田 穣, 柴田 康行

    日本堆積学会例会, 2006年03月, 日本語, 大阪, 国内会議

    口頭発表(一般)

  • 完新世の底生有孔虫群集による北西太平洋のOMZの変動記録および将来予測に向けた研究

    酒井恵祐, 大串健一, 芝原暁彦

    日本古生物学会2021年年会, 2021年07月

    ポスター発表

  • 太平洋の溶存酸素極小層の時空間変動モデル構築に向けた予察的研究

    酒井恵祐, 大串健一, 芝原暁彦

    国際火山噴火史情報研究集会, 2021年04月

所属学協会

  • 日本第四紀学会

  • American Geophysical Union

  • 日本堆積学会

  • 日本古生物学会

  • 日本地質学会

共同研究・競争的資金等の研究課題