Masahito Shigemitsu

Profile Information

Affiliation: Japan Agency for Marine-Earth Science and Technology

J-GLOBAL ID: 201801016768232107
researchmap Member ID: B000343567

海洋の生物地球化学的なダイナミクスを調べています。

Research Interests

Ocean biogeochemical dynamics

Research Areas

Natural sciences / Space and planetary science / Ocean biogeochemical dynamics

Research History

Apr, 2020 - Present

Researcher, Physical and Chemical Oceanography Research Group, Japan Agency For Marine-Earth Science and Technology
Apr, 2015 - Mar, 2020

Japan Agency for Marine-Earth Science and Technology
Apr, 2008 - Mar, 2015

博士研究員, 地球圏科学部門気候力学分野, 北海道大学地球環境科学研究員
Mar, 2011 - Feb, 2012

客員研究員, 環境物理学部, スイス連邦工科大学
Apr, 2007 - Jul, 2007

Hokkaido Tokai University
Apr, 2005 - Mar, 2007

21世紀COEプログラムリサーチアシスタント, 北海道大学地球環境科学研究院
Apr, 2002 - Mar, 2005

Nippon Koei

Education

Apr, 2005 - Mar, 2008

Graduate School of Environmental Science, Hokkaido University
Apr, 2000 - Mar, 2002

Hokkaido University
Apr, 1995 - Mar, 2000

School of Fisheries Sciences, Hokkaido University

Committee Memberships

Feb, 2024 - Present

Global Ship-based Hydrographic Investigation Program, Executive group

Papers

Controlling factors of latitudinal distribution of dissolved organic matter in the upper layers of the Indian Ocean

Masahito Shigemitsu, K. Sasaoka, M. Wakita, T. Yokokawa, T. Hashioka, K. Arulananthan, A. Murata

Progress in Earth and Planetary Science, Apr, 2024 Peer-reviewedLead authorCorresponding author
A nitrogen isoscape of phytoplankton in the western North Pacific created with a marine nitrogen isotope model

C. Yoshikawa, M. Shigemitsu, A. Yamamoto, A. Oka, N. Ohkouchi

Frontiers in Marine Science, 11, Jan, 2024 Peer-reviewed
Editorial: Constraining uncertainties in hindcasts and future projections of marine deoxygenation

Shigemitsu M, Duteil O, Ito T, Tjiputra J, Eddebbar Y

Frontiers in Marine Science, 10:1355015, Dec, 2023 Peer-reviewedLead authorCorresponding author
Sedimentary supply of humic-like fluorescent dissolved organic matter and its implication for chemoautotrophic microbial activity in the Izu-Ogasawara Trench

Masahito Shigemitsu, Taichi Yokokawa, Hiroshi Uchida, Shinsuke Kawagucci, Akihiko Murata

Scientific Reports, 11 19006, Sep, 2021 Peer-reviewedLead authorCorresponding author
Determining the distribution of fluorescent organic matter in the Indian Ocean using in situ fluorometry

Shigemitsu, M, H. Uchida, T. Yokokawa, K. Arulananthan, A. Murata

Frontiers in Microbiology, Dec, 2020 Peer-reviewedLead authorCorresponding author
Visualizing the Interconnections Among Climate Risks

Yokohata, T., Tanaka, K., Nishina, K., Takahashi, K., Emori, S., Kiguchi, M., Iseri, Y., Honda, Y., Okada, M., Masaki, Y. …

Earth's Future, 7 85-100, 2019 Peer-reviewed
Biological data assimilation for parameter estimation of a phytoplankton functional type model for the western North Pacific

Hoshiba, Y, T. Hirata, M. Shigemitsu, H. Nakano, T. Hashioka, Y. Masuda, Y. Yamanaka

Ocean Sci., 14(3) 371-386, 2018 Peer-reviewed
Ocean Deoxygenation : Effect of Global Warming on the Loss of Dissolved Oxygen from the Ocean and Uncertainty of the Future Projection

182(182) 123-149, 2017 Lead author
One possible uncertainty in CMIP5 projections of low-oxygen water volume in the Eastern Tropical Pacific

Shigemitsu, M., Yamamoto, A., Oka, A., Yamanaka, Y.

Global Biogeochemical Cycles, 31(5), 2017 Peer-reviewedLead authorCorresponding author
Potential use of the N-2/Ar ratio as a constraint on the oceanic fixed nitrogen loss

M. Shigemitsu, N. Gruber, A. Oka, Y. Yamanaka

GLOBAL BIOGEOCHEMICAL CYCLES, 30(4) 576-594, Apr, 2016 Peer-reviewedLead authorCorresponding author
海洋生態系モデル（Marine Ecosystem Model:MEM）の概要

重光雅仁, 山中康裕

月刊海洋, 548 281-290, 2016 Lead author
Global deep ocean oxygenation by enhanced ventilation in the Southern Ocean under long-term global warming

Yamamoto, A., Abe-Ouchi, A., Shigemitsu, M., Oka, A., Takahashi, K., Ohgaito, R., Yamanaka, Y.

Global Biogeochemical Cycles, 29(10) 1801-1815, 2015 Peer-reviewed
Application of chemical tracers to an estimate of benthic denitrification in the Okhotsk Sea

Masanori Ito, Yutaka W. Watanabe, Masahito Shigemitsu, Shinichi S. Tanaka, Jun Nishioka

JOURNAL OF OCEANOGRAPHY, 70(5) 415-424, Oct, 2014 Peer-reviewed
Decadal shift of biogenic sinking particle flux in the western North Pacific subpolar region

Yutaka W. Watanabe, Masahito Shigemitsu, Takashi Ujiie, Hideki Minami

GEOPHYSICAL RESEARCH LETTERS, 41(2) 513-518, Jan, 2014 Peer-reviewed
Spatial variability in iron nutritional status of large diatoms in the Sea of Okhotsk with special reference to the Amur River discharge

K. Suzuki, A. Hattori-Saito, Y. Sekiguchi, J. Nishioka, M. Shigemitsu, T. Isada, H. Liu, R. M. L. McKay

BIOGEOSCIENCES, 11(9) 2503-2517, 2014 Peer-reviewed
Significant decadal shift of oceanic phytoplankton in the high-latitudinal North Pacific

Watanabe, Y.W, M. Shigemitsu, T. Ujiie, H. Minami

Geophysical Research Letters, 41 513-518, 2014 Peer-reviewed
Fe/Al ratios of suspended particulate matter from intermediate water in the Okhotsk Sea: Implications for long-distance lateral transport of particulate Fe

Masahito Shigemitsu, J. Nishioka, Y. W. Watanabe, Y. Yamanaka, T. Nakatsuka, Y. N. Volkov

MARINE CHEMISTRY, 157 41-48, Dec, 2013 Peer-reviewedLead authorCorresponding author
The acceleration of oceanic denitrification during deglacial warming

Eric D. Galbraith, Markus Kienast, Ana Luiza Albuquerque, Mark A. Altabet, Fabian Batista, Daniele Bianchi, Stephen E. Calvert, Sergio Contreras, Xavier Crosta, Ricardo De Pol-Holz …

NATURE GEOSCIENCE, 6(7) 579-584, Jul, 2013 Peer-reviewed
A comparison between phytoplankton community structures derived from a global 3D ecosystem model and satellite observation

Takafumi Hirata, Stephane Saux-Picart, Taketo Hashioka, Maki Aita-Noguchi, Hiroshi Sumata, Masahito Shigemitsu, J. Icarus Allen, Yasuhiro Yamanaka

Journal of Marine Systems, 109-110 129-137, Jan, 2013 Peer-reviewed
A review of nitrogen isotopic alteration in marine sediments

Rebecca S. Robinson, Markus Kienast, Ana Luiza Albuquerque, Mark Altabet, Sergio Contreras, Ricardo De Pol Holz, Nathalie Dubois, Roger Francois, Eric Galbraith, Ting-Chang Hsu …

PALEOCEANOGRAPHY, 27, Oct, 2012 Peer-reviewed

Misc.

インド洋表層に存在する溶存有機物の制御要因

重光雅仁, 笹岡晃征, 脇田昌英, 横川太一, 橋岡豪人, 村田昌彦

日本海洋学会大会講演要旨集(Web), 2022, 2022
General features of sediment cores collected in the Okhotsk Sea and the adjacent area during the MR00-K03 cruise.

HARADA N, T. KANAMATSU, K. KIMOTO, H. NARITA, T. SUGAWARA, H. MURAKI, A. KATO, K. MATSUO, Y. MATSUURA, S. KOYAMA …

JAMSTEC REPORT, 43 45-54, 2001

Books and Other Publications

Relating phytoplankton physiology to North Pacific Biogeochemistry, Western Pacific Air-Sea Interaction Study

Smith S. L, M. N. Aita, M. Shigemitsu, Y. Yamanaka (Role: Joint author, Western Pacific Air-Sea Interaction Study)

TERRAPUB, 2014

Presentations

Dissolved organic carbon (DOC) in the Indian Ocean

Masahito Shigemitsu, Chisato Yoshikawa, Masahide Wakita, Akihiko Murata

Sep 26, 2019
Revisiting the stoichiometry of marine organic matter decomposition

Shigemitsu, M, M. Aoyama, T. Doi, T. Yokokawa, A. Murata

2018 Ocean Science Meeting, 2018
Possible uncertainty in CMIP5 projections of low-oxygen water volume in the Eastern Tropical Pacific

Shigemitsu, M, A. Yamamoto, A. Oka, Y. Yamanaka

JpGU-AGU Joint Meeting 2017, 2017
Climate-driven variability and anthropogenic trend of oceanic suboxia

Shigemitsu, M, A. Yamamoto, A. Oka, Y. Yamanaka

IMBER Open Science Conference, 2014
Oxygen trends in the Atlantic over the 20th and 21st centuries projected by a 3D ocean biogeochemical model

Shigemitsu, M, A. Yamamoto, Y. Yamanaka

Instability in the Earth System, 2013
The role of suspended matters on Fe horizontal transport from continental shelf to the ocean interior

higemitsu, M, J. Nishioka, Y. W. Watanabe, Y. Yamanaka, T. Nakatsuka

The 3rd Geotraces data/model synergy workshop, 2011
Development of a one-dimensional ecosystem model including iron cycle

Shigemitsu, M, T. Okunishi, J. Nishioka, H. Sumata, T. Hashioka, N. M. Aita, S. L. Smith, N. Yoshie, Y. Yamanaka

The 43rd international Liege colloquium, 2011
Interpretation of seasonal variations of the δ15N of settling particulate nitrogen in the western subarctic Pacific

Shigemitsu, M, Y. Yamanaka, Y. W. Watanabe, N. Maeda, S. Noriki

PAGES-IMAGES NICOPP workshop, 2010
Seasonal characteristics of the carbon isotope biogeochemistry of settling particles in the western subarctic Pacific: a model study

Shigemitsu, M, Y. Yamanaka, Y. W. Watanabe, N. Okada, I. Kriest, A. Oschlies, N. Maeda, S. Noriki

2nd Geotraces data/model synergy workshop, 2009
Interpretation of the carbon isotopic signal variations of settling particles in the western subarctic Pacific using a one-dimensional ecosystem model including carbon isotopes

Shigemitsu, M, Y. Yamanaka, Y. W. Watanabe, N. Maeda, S. Noriki

ASLO Aquatic Science Meeting, 2008
Response of δ15N of settling particles to ocean stratification in the western subarctic North Pacific

Shigemitsu, M, Y. W. Watanabe, N. Maeda, S. Noriki

9th Hokkaido University – Seoul National University Joint Symposium, 2007

Research Projects

地球温暖化に伴う「海洋酸性化・貧酸素化」の将来予測に溶存有機物は考慮すべきか？

日本学術振興会科学研究費助成事業基盤研究(B), Apr, 2024 - Mar, 2027

重光雅仁、横川太一、山田洋輔
The role of the biological pump in regulating the ocean carbon cycle

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2022 - Mar, 2025
Acceleration of ocean acidification due to shutdown of winter CO2 efflux in the subarctic western North Pacific Ocean

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2020 - Mar, 2025
Impacts of Climate Variability and Change on Ocean Oxygen

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2023
窒素同位体モデルを用いた新たな古海洋窒素サイクル解析手法の確立

科学研究費助成事業挑戦的研究(萌芽), 挑戦的研究(萌芽), 日本学術振興会, Jun, 2019 - Mar, 2022

吉川知里, 重光雅仁
Clarification of effect of dark dissolved inorganic carbon (DIC) fixation on oceanic carbon cycle

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2019 - Mar, 2022
漂流ブイによる海洋表層CO2分圧の中長期モニタリング観測‐データ空白域の解消を目指して‐

環境省地球環境保全試験研究費, Apr, 2016 - Mar, 2021

村田昌彦
太平洋の広域観測データに基づく新たな窒素固定モデルの開発

東京大学学際連携研究, Apr, 2016 - Mar, 2017

橋岡豪人
Transport process of suspended matter from the Sea of Okhotsk to the western subarctic Pacific

Apr, 2008 - Mar, 2009

Masahito Shigemitsu

Social Activities

海のデッドゾーンー貧酸素水塊（温暖化の影響と予測の不確実性）

Official expert

公益財団法人日立財団, Jan 27, 2016

Profile Information

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Research History

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Papers

Misc.

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