Seki Osamu

セキオサム | Seki Osamu

Affiliation and department：
Job title： Associate Professor
Homepage URL (1)： http://kaken.nii.ac.jp/d/r/30374648.ja.html

Research field (4)： Biogeoscience , Environmental dynamics , Solid earth science , Space and planetary science

Research keywords (22)：大気エアロゾル , セルロース , 同位体測定 , 環境動態解析 , 環境変動 , 完新世 , エアロゾル , 吸湿特性 , 水圏化学 , 太平洋 , 有機物トレーサー , 鮮新世温暖期 , 降水 , 泥炭 , 化学組成 , データ・モデル統合 , 酸素同位体 , 東・南アジア , 大気圏 , 気候変動 , 海洋ゲートウェイ , 雲凝結核

Research theme for competitive and other funds (22)：

2024 - 2029 Understanding Large-Scale Retreat Mechanisms of the Antarctic Ice Sheet through Seamless Sea-Land Geological Drilling
2024 - 2029 グローバル南極学:大変化する氷床と地球環境の連鎖をつなぐ
2024 - 2029 過去の温暖期における南極氷床・海洋実像の解明
2020 - 2025 +5°Cまで温暖化が進行する過程における南極氷床融解のふるまいと特性の解明
2021 - 2024 完新世における東南極トッテン氷河の融解と暖水塊流入の影響評価

2021 - 2024 Variation of plant production in the lake during the historical period to estimate the human impact in the lake environment

2019 - 2024 Reconstruction of atmospheric carbon dioxide concentration during the last 6 million years and the study of the interaction between atmospheric carbon dioxide and climate

2019 - 2024 東南極沿岸での海域-陸域シームレス掘削による最終間氷期以降の氷床変動史の復元

2018 - 2023 Construction of world’s most reliable deposited-aerosol database on the Anthropocene (from 1850 to 2020)

2017 - 2022 Paleoclimate dynamics of the Southern Ocean

2017 - 2021 Glacial-deglacial changes in the North Pacific Intermediate Water

2017 - 2021 Mechanism of significant Antarctic ice sheet collapse events during the Last Interglacial

2017 - 2020 Impact of deglacial melt of the Cordillera Ice Sheet on the Gulf of Alaska coastal environment: geochemical and molecular biological analyses of marine sediments

2016 - 2019 Pacific meridional overturning circulation since the last glaciation

2014 - 2019 Evaluation of anthropogenic air temperature change by using past aerosols in a Greenlandic ice core.

2015 - 2018 Borneo peat coring; reconstruction of tropical atmospheric convection activity during the llast 4000 years

2014 - 2017 Development of synthetic approach to reconstruct the past interaction between landuse change and river discharge or marine ecosystem

2014 - 2017 Mechanism of the late Miocene global cooling driven by decline of CO2

2012 - 2017 Composition, origin, transformation and hygroscopic properties of organic aerosols in East Asia and the North Pacific

2013 - 2015 Paleoclimate reconstruction by oxygen isotope analysis of sedimentary cellulose

2012 - 2015 Paleoceanography in the North Pacific during Pliocene warm period

2007 - 2010 Chemical compositions, spatial distributions and hygroscopic properties of organic aerosols from East and South Asia

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Papers (79)：

KHALED S. Sinoussy, Hiroshi Naraoka, Osamu Seki, MAHMOUD A. Hassaan, Yusuke Okazaki. Hydrological and vegetation changes in North Africa over the past 23 000 years: a comparative study of watershed areas of the Nile River using remote sensing and compound-specific δ²H and δ¹³C from the Eastern Mediterranean Sea. Journal of Quaternary Science. 2024. 39. 7. 1064-1077
Mutsumi Iizuka, Takuya Itaki, Osamu Seki, Ryosuke Makabe, Motoha Ojima, Shigeru Aoki. Radiolarian assemblages related to the ocean-ice interaction around the East Antarctic coast. Journal of Micropalaeontology. 2024. 43. 1. 37-53
Mutsumi Iizuka, Osamu Seki, David J. Wilson, Yusuke Suganuma, Keiji Horikawa, Tina van de Flierdt, Minoru Ikehara, Takuya Itaki, Tomohisa Irino, Masanobu Yamamoto, et al. Multiple episodes of ice loss from the Wilkes Subglacial Basin during the Last Interglacial. Nature Communications. 2023. 14. 1
Erica Marumo, Miki U. Ueda, Osamu Seki, Kentaro Takagi, Kobayashi Makoto. Influence of Earlier Snowmelt on the Seedling Growth of Six Subboreal Tree Species in the Spring. Forests. 2023. 14. 3. 600-600
Michael E. Weber, Ian Bailey, Sidney R. Hemming, Yasmina M. Martos, Brendan T. Reilly, Thomas A. Ronge, Stefanie Brachfeld, Trevor Williams, Maureen Raymo, Simon T. Belt, et al. Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years. Nature Communications. 2022. 13. 1

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MISC (58)：

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Lectures and oral presentations (17)：

網走湖堆積物中有機物分析による過去300年間の環境変化
(日本地球化学会年会講演要旨集 2014)
カリフォルニア沖における融氷期のメタン放出イベント
(日本地球化学会年会講演要旨集 2014)
アイスコア解析から明らかになった十年規模の気候変動に対する炭素質エアロゾルのインパクト
(日本地球化学会年会講演要旨集 2014)
古気候・古環境分野からの提案
(日本地球化学会年会講演要旨集 2014)
ベーリング海低塩分水の北極海への流入による鮮新世の寒冷化
(日本地球化学会年会講演要旨集 2014)

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Professional career (1)：

博士(地球環境科学) (北海道大学)

Work history (1)：

2012 - 2015 Hokkaido University Institute of Low Temperature Science

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