Yasunaka Sayaka

Profile Information

Affiliation: Professor, Graduate School of Science, Tohoku University
: (Concurrent)WPI-AIMEC (Unit Leader)
: Principal Researcher, WPI-AIMEC, Japan Agency for Marine-Earth Science and Technology

Degree: Doctor of Science(Tohoku University)

J-GLOBAL ID: 201501000545556290
researchmap Member ID: B000247615

Research Interests

Research Areas

Research History

Oct, 2024 - Present

Senior Researcher (Cross Appointment), JAMSTEC
Oct, 2021 - Present

Professor, Tohoku University
Oct, 2021 - Mar, 2024

Visiting Principal Researcher, JAMSTEC
Oct, 2020 - Sep, 2021

Researcher, JAMSTEC
Jan, 2020 - Sep, 2021

Associate Professor (Cross Appointment), Tohoku University
Apr, 2014 - Sep, 2020

Researcher, JAMSTEC
Jul, 2011 - Mar, 2014

Research Associate, NIES
Apr, 2009 - Jun, 2011

Research Fellow (PD), JSPS
Apr, 2007 - Mar, 2009

Research Fellow (RPD), JSPS
Apr, 2006 - Jul, 2006

Research Assistant, Tohoku University
Apr, 2005 - Mar, 2006

Research Fellow (PD), JSPS
Apr, 2003 - Mar, 2005

Research Fellow (DC2), JSPS

Education

Apr, 2001 - Mar, 2005

Tohoku University
Apr, 1999 - Mar, 2001

Tohoku University
Apr, 1995 - Mar, 1999

Faculty of Science, Tohoku University

Committee Memberships

Dec, 2024 - Present

Director, Japan Society of Ocean Policy
Apr, 2024 - Present

Representative, JpGU
Apr, 2023 - Present

Officer/Director, Oceanographic Society of Japan
Jan, 2023 - Present

Pacific Regional Panel, Member, CLIVAR
Jun, 2022 - Present

Science Advisory Committee for earth observation, Member, JAXA
Apr, 2022 - Present

Member, Japanese National Commission for UNESCO
Apr, 2021 - Present

Atmospheric and Hydrospheric Sciences, Board Member, JpGU
Apr, 2021 - Present

Member, CLIVAR-Japan Committee
Oct, 2019 - Present

Steering Committee, JCAR
Apr, 2019 - Present

Council Member, Oceanographic Society of Japan
Apr, 2018 - Present

Member, SOLAS-Japan Committee
Apr, 2023 - May, 2025

Selection committee member of the Environmental Science Prize, Oceanographic Society of Japan
Apr, 2021 - Mar, 2025

PR comittee member, Japan Society of Ocean Policy
Apr, 2021 - Mar, 2022

Advisor for gender equality, JSPS
Apr, 2017 - Mar, 2021

Officer, Oceanographic Society of Japan
Jun, 2018 - Mar, 2020

Member, IOCCP Review Panel

Awards

2023

Environmental Science Prize, Oceanographic Society of Japan

Sayaka Yasunaka
2020

Hidaka Outstanding-Publication Award, Oceanographic Society of Japan

Sayaka Yasunaka
2003

Kuroda Chika Prize, Aoba Promotion

Sayaka Yasunaka

Papers

Arctic marine environments regulated by ocean transport and air‒sea‒land interaction: Findings from the ArCS II Ocean Research Program

Eiji Watanabe, Hiromichi Ueno, Tsubasa Kodaira, Akihiko Murata, Shigeto Nishino, Takahito Ikenoue, Masanobu Yamamoto, Daiki Nomura, Hiroto Abe, Yusuke Kawaguchi …

Polar Science, 101205-101205, Apr, 2025
Spatiotemporal variation of high-temperature events and its relation to coral bleaching in the Ryukyu Islands, Japan

Sayaka Yasunaka, Haruko Kurihara, Takeshi Doi

Progress in Earth and Planetary Science, 12(1), Jan 21, 2025
Quantitative Assessment of Factors Contributing to Variations in Sea Surface pCO₂ in the Pacific Sector of the Arctic Ocean

Manami Tozawa, Daiki Nomura, Mirai Matsuura, Mariko Hatta, Amane Fujiwara, Sayaka Yasunaka, Akihiko Murata

Journal of Geophysical Research: Oceans, 129(6), Jun 6, 2024
An Assessment of CO₂ Uptake in the Arctic Ocean From 1985 to 2018

Sayaka Yasunaka, Manfredi Manizza, Jens Terhaar, Are Olsen, Ryohei Yamaguchi, Peter Landschützer, Eiji Watanabe, Dustin Carroll, Hanani Adiwira, Jens Daniel Müller …

Global Biogeochemical Cycles, 37(11), Nov 10, 2023 Peer-reviewed
Magnitude, Trends, and Variability of the Global Ocean Carbon Sink From 1985 to 2018

Tim DeVries, Kana Yamamoto, Rik Wanninkhof, Nicolas Gruber, Judith Hauck, Jens Daniel Müller, Laurent Bopp, Dustin Carroll, Brendan Carter, Thi‐Tuyet‐Trang Chau …

Global Biogeochemical Cycles, 37(10), Oct 17, 2023 Peer-reviewed
Anomalous Nutricline Drives Marked Biogeochemical Contrasts During the Kuroshio Large Meander

Hakase Hayashida, Andrew E. Kiss, Toru Miyama, Yasumasa Miyazawa, Sayaka Yasunaka

Journal of Geophysical Research: Oceans, 128(7), Jul 11, 2023 Peer-reviewed
Simulated decadal variations of surface and subsurface phytoplankton in the upstream Kuroshio Extension region

Tomoki Tozuka, Yoshikazu Sasai, Sayaka Yasunaka, Hideharu Sasaki, Masami Nonaka

PROGRESS IN EARTH AND PLANETARY SCIENCE, 9(1), Dec, 2022 Peer-reviewed
Early Wintertime CO ₂ Uptake in the Western Arctic Ocean

A. Murata, J. Inoue, S. Nishino, S. Yasunaka

Journal of Geophysical Research: Oceans, 127(8), Aug, 2022 Peer-reviewed
Overview: Recent advances in the understanding of the northern Eurasian environments and of the urban air quality in China – a Pan-Eurasian Experiment (PEEX) programme perspective

Lappalainen, H. K, Petäjä, T, Vihma, T, Räisänen, J, Baklanov, A, Chalov, S, Esau, I, Ezhova, E, Leppäranta, M, Pozdnyakov, D …

Atmos. Chem. Phys., 22 4413-4469, 2022 Peer-reviewed
Global distribution and variability of subsurface chlorophyll &lt;i&gt;a&lt;/i&gt; concentrations

Sayaka Yasunaka, Tsuneo Ono, Kosei Sasaoka, Kanako Sato

Ocean Science, 18(1) 255-268, 2022 Peer-reviewed
Decadal vision in oceanography 2021: Polar oceans

Michiyo Yamamoto-Kawai, Takeshi Tamura, Eiji Watanabe, Jun Nishioka, Daiki Nomura, Ryusuke Makabe, Kohei Mizobata, Yasunaka Sayaka

Oceanography in Japan, 30(5) 159-178, Nov, 2021 Peer-reviewed
Decadal vision in oceanography 2021: Tropical oceans

Doi Takeshi, Yasunaka Sayaka, Takahashi Kazutaka, Watanabe Michio, Tozuka Tomoki, Haruko Kurihara and

Oceanography in Japan, 30(5) 105-129, Nov, 2021 Peer-reviewed
Nutrient and dissolved inorganic carbon variability in the North Pacific

Sayaka Yasunaka, Humio Mitsudera, Frank Whitney, Shin-ichiro Nakaoka

JOURNAL OF OCEANOGRAPHY, 77(1) 3-16, 2020 Peer-reviewed
Addressing Arctic challenges requires a synoptic ocean survey

Øyvind Paasche, Are Olsen, Marius Årthun, Leif G. Anderson, Sten-Åke Wängberg, Carin J. Ashjian, Jacqueline M. Grebmeier, Takashi Kikuchi, Shigeto Nishino, Sayaka Yasunaka, Sung-Ho Kang, Kyoung-Ho Cho, Kumiko Azetsu-Scott, William J. Williams, Eddy Carmack, Sinhué Torres-Valdés, Toby Tyrrell, Karen Edelvang, Jianfeng He, and Heidi Marie Kassens

EOS, 100, 2019 Peer-reviewed
Spatio-temporal variability of surface water pCO2 and nutrients in the tropical Pacific from 1981 to 2015

Yasunaka, S., S. Kouketsu, P.G. Strutton, A.J. Sutton, A. Murata, S. Nakaoka, Y. Nojiri

Deep Sea Res. Part II, 167-170 104680, 2019 Peer-reviewed
Deployment of drifting buoys with pCO 2 sensors in the Pacific Ocean

Akihiko Murata, Yoshiyuki Nakano, Shuhei Masuda, Sayaka Yasunaka, Kousei Sasaoka, Masahide Wakita

2018 OCEANS - MTS/IEEE Kobe Techno-Oceans, OCEANS - Kobe 2018, Dec 4, 2018
Arctic Ocean CO2 uptake: An improved multiyear estimate of the air-sea CO2 flux incorporating chlorophyll a concentrations

Sayaka Yasunaka, Eko Siswanto, Are Olsen, Mario Hoppema, Eiji Watanabe, Agneta Fransson, Melissa Chierici, Akihiko Murata, Siv K. Lauvset, Rik Wanninkhof …

Biogeosciences, 15(6) 1643-1661, Mar 22, 2018 Peer-reviewed
Basin-scale distribution of NH4 + and NO2 − in the Pacific Ocean

Sayaka Yasunaka, Yukihiro Nojiri, Taketo Hashioka, Chisato Yoshikawa, Taketoshi Kodama, Shin-ichiro Nakaoka, Sanae Chiba, Fuminori Hashihama, Masahide Wakita, Ken Furuya …

Journal of Oceanography, 74(1) 1-11, Feb 1, 2018 Peer-reviewed
Biological organic carbon export estimated from the annual carbon budget observed in the surface waters of the western subarctic and subtropical North Pacific Ocean from 2004 to 2013

Masahide Wakita, Makio C. Honda, Kazuhiko Matsumoto, Tetsuichi Fujiki, Hajime Kawakami, Sayaka Yasunaka, Yoshikazu Sasai, Chiho Sukigara, Mario Uchimiya, Minoru Kitamura …

JOURNAL OF OCEANOGRAPHY, 72(5) 665-685, Oct, 2016 Peer-reviewed
Mapping of the air-sea CO2 flux in the Arctic Ocean and its adjacent seas: Basin-wide distribution and seasonal to interannual variability

Sayaka Yasunaka, Akihiko Murata, Eiji Watanabe, Melissa Chierici, Agneta Fransson, Steven van Heuven, Mario Hoppema, Masao Ishii, Truls Johannessen, Naohiro Kosugi …

POLAR SCIENCE, 10(3) 323-334, Sep, 2016 Peer-reviewed

Books and Other Publications

レジームシフト－気候変動と生物資源管理－

川崎健, 花輪公雄, 谷口旭, 二平章 (Role: Contributor, 第2章過去100年間の全球海面水温場に出現したレジームシフト)

成美堂出版, 2007 (ISBN: 9784425531011)

Presentations

Subsurface chlorophyll-a in the tropical Pacific

Sayaka Yasunaka

El Niño-Southern Oscillation: Past, Present, and Future, Mar 14, 2025
CO2 uptake in the Arctic Ocean

Sayaka Yasunaka

SAS webinar, Nov 18, 2024 Invited
Pathways to an integrated understanding of the marine environment and marine ecosystems in Asia-Pacific Region

Sayaka Yasunaka, Hanani Adiwira, Jamie Kass, Toshio Suga

ICTCRED2024, Sep 24, 2024
CO2 uptake in the Arctic Ocean

Sayaka Yasunaka

May 30, 2024 Invited
Marine Environment Integrative Analysis −from coast to world ocean, from seasonal to 10,000 year scale−

Sayaka Yasunaka

JpGU2024, May 27, 2024 Invited
琉球列島周辺海域における高水温イベントとサンゴ白化

安中さやか, 栗原晴子, 土井威志

JpGU2024, May 26, 2024
海洋表層生物地球化学パラメータの広域分布と季節経年変動

安中さやか

大槌シンポジウム, Aug 23, 2023 Invited
データの蓄積が明らかにする海洋環境変化

安中さやか

BBNJ協定の下での海洋遺伝資源のアクセスと利益配分, Jul 29, 2023 Invited
An assessment of CO2 uptake in the Arctic Ocean from 1985 to 2018

Yasunaka, S, Manizza, M, Terhaar, J, Olsen, A, Yamaguchi, R, Landschutzer, P, Watanabe, E, Carroll, D, Adiwara, H, Muller, J. D, Hauck, J

JpGU2023, May 24, 2023
An assessment of CO2 uptake in the Arctic Ocean from 1985 to 2018

Yasunaka, S, Manizza, M, Terhaar, J, Olsen, A, Yamaguchi, R, Landschutzer, P, Watanabe, E, Carroll, D, Adiwara, H, Muller, J. D, Hauck, J.

EGU2023, Apr 24, 2023
北極海CO2吸収

安中さやか

低温研共同利用研究集会, Feb 27, 2023
データの蓄積が明らかにする海洋環境変化

安中さやか

国連海洋科学の10年シンポジウム, Feb 21, 2023
熱帯域における生物地球化学パラメータの分布変動

安中さやか

日本海洋学会 2022年度秋季大会, Sep 7, 2022
Data accumulation reveals changes in the ocean environment

Sayaka Yasunaka

Ocean Decade Laboratories | A Productive Ocean, Jun 1, 2022
クロロフィルa亜表層極大の広域分布と BGC Argoによる今後の研究展開

安中さやか

JpGU2022, May 24, 2022 Invited

Research Projects

海洋積算高水温の発生維持機構とその予測可能性

科学研究費助成事業基盤研究(C), 基盤研究(C), 日本学術振興会, Apr, 2023 - Mar, 2027

安中さやか
逆推定法を利用した太平洋大規模循環・変動と沿岸水の関わりの解明

Grant-in-Aid for Transformative Research Areas (A), Jun, 2022 - Mar, 2027
海洋課題北極海環境動態の解明と汎用データセットの構築

ArCS II: Arctic Challenge for Sustainability II, Ministry of Education, Culture, Sports, Science and Technology, Apr, 2022 - Mar, 2025

Watanabe Eiji, Ueno Hiromichi, Itoh Motoyo, Kimura Satoshi, Zhang Yuanxin, Yasunaka Sayaka, Hatta Mariko, Nakajima Ryota, Ikenoue Takahito, Murata Akihiko, Shigemitsu Masahito, Noguchi Maki, Nishino Shigeto, Onodera Jonaotaro, Fujiwara Amane, Sugie Koji, Kimoto Katsunori, Kitamura Minoru, Abe Hiroto, Matsuno Kohei, Kasai Akihide, Kawakami Tatsuya, Nomura Daiki, Hirata Takafumi, García Molinos Jorge、Alabia Dolorfino Irene, Ohshima Keiichiro, Nishioka Jun, Kameyama Sohiko, Yamamoto Masanobu, Hirawake Toru, Ito Masato, Harada Naomi, Shiozaki Takuhei, Kawaguchi Yusuke, Kodaira, Tsubasa、Mizobata Kohei, Kawai Michiyo
北極海におけるCO2吸収量の長期変化傾向

科学研究費補助金（基盤C）, Apr, 2020 - Mar, 2023

安中さやか
気候変動が引き起こす海洋溶存酸素変化：データ解析と数値計算による総合研究

科学研究費補助金（基盤A）, Apr, 2018 - Mar, 2023

見延庄士郎
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‐

地球環境保全試験研究費, 環境省, 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

学際連携研究, 東京大学, Apr, 2016 - Mar, 2017

橋岡豪人
生元素循環および生態系の長期変動解明

科学研究費補助金（新学術）, Apr, 2014 - Mar, 2016

千葉早苗
大気海洋結合大循環モデルで再現された十年規模変動とその予測可能性

科学研究費補助金（特別研究員奨励費）, 特別研究員奨励費, 日本学術振興会, Apr, 2009 - Mar, 2012

安中さやか
全球大気海洋系における卓越変動の季節発展と海洋亜表層の役割

科学研究費補助金（特別研究員奨励費）, 特別研究員奨励費, 日本学術振興会, Apr, 2007 - Mar, 2009

安中さやか
全球海面水温場に出現するレジームシフトとその季節依存性

科学研究費補助金（特別研究員奨励費）, 特別研究員奨励費, 日本学術振興会, Apr, 2003 - Mar, 2006

安中さやか

Misc.

海洋表層生物地球化学パラメータの広域分布と季節経年変動

安中さやか

月刊海洋, 640 275-280, Apr, 2024
気候-生態系の構造転換: レジームシフト

安中さやか

岩波科学, 93(12) 1030-1032, Dec, 2023
混合層の炭素収支から見積もられた西部北太平洋亜寒帯域・亜熱帯域における有機炭素の輸送フラックス

脇田昌英, 本多牧生, 松本和彦, 藤木徹一, 川上創, 安中さやか, 笹井義一, 鋤柄千穂, 内宮万里央, 喜多村稔 …

日本海洋学会大会講演要旨集, 2016, 2016
A164 海洋表層CO_2観測と広域分布推定研究の動向(温室効果気体研究の観測・測定技術の進展による新たな展開,スペシャル・セッション)

中岡慎一郎, 野尻幸宏, 安中さやか, 小埜恒夫, 向井人史

大会講演予講集, 108 114-114, 2015
北極海CO2フラックスの分布推定とその時空間変動特性

安中さやか, 村田昌彦, 内田裕, 渡邉英嗣, 西野茂人, 小杉如央, 笹野大輔, 石井雅男

日本海洋学会大会講演要旨集, 2014, 2014
北極海CO2フラックスの分布推定とその時空間変動特性

安中さやか, 村田昌彦, 渡邉英嗣, 小杉如央, 笹野大輔, 石井雅男, 西野茂人, 内田裕

極域科学シンポジウム講演予稿集(CD-ROM), 5th, 2014
気候・海洋の長期変動と近年の動向 : 気候レジームシフトの生起条件

安中さやか, 花輪公雄

水産海洋研究, 76(4) 212-213, Nov 1, 2012
B102 大気海洋結合モデルMIROCに見られるPDO : 中緯度固有モード(気候システムI,一般口頭発表)

森正人, 木本昌秀, 渡部雅浩, 安中さやか, 今田由紀子, 建部洋晶, 石井正好

大会講演予講集, 97 77-77, 2010
C157 アンサンブルデータ同化手法を用いた近未来気候変動予測実験(様々な時間スケールでのデータ同化とアンサンブル予測,専門分科会)

望月崇, 石井正好, 木本昌秀, 近本喜光, 渡部雅浩, 野沢徹, 坂本天, 塩竈秀夫, 淡路敏之, 杉浦望実 …

大会講演予講集, 97 136-136, 2010
P126 歴史的海面水温データセットの相互比較(ポスターセッション)

安中さやか, 花輪公雄

大会講演予講集, 97 243-243, 2010
Regime shifts in global SSTs during the last centenary

Kaiyo monthly, 40(8) 439-447, Oct, 2008
A357 大気海洋結合モデルを用いた1997/98年El Ninoイベントの予測(予測可能性,スペシャル・セッション「データ同化と予測可能性」II)

近本喜光, 木本昌秀, 渡部雅浩, 建部洋晶, 安中さやか, 森正人, 今田由紀子, 石井正好

大会講演予講集, 94 101-101, 2008
A356 近未来地球温暖化予測実験 : 十年スケール自然変動の精度よい予測を目指して(予測可能性,スペシャル・セッション「データ同化と予測可能性」II)

望月崇, 石井正好, 木本昌秀, 近本喜光, 渡部雅浩, 安中さやか, 坂本天, 塩竈秀夫

大会講演予講集, 94 100-100, 2008
P320 日本の冬季気温の経年変動とその大規模大気循環場との関係

安中さやか, 花輪公雄

大会講演予講集, 93 431-431, 2008
P438 日本の夏季気温場の経年変動と大気循環場

安中さやか, 花輪公雄

大会講演予講集, 89 464-464, 2006
P161 日本の冬季・夏季気温場の卓越モードと大気大循環場および海面水温場との関係

八木晃司, 安中さやか, 木津昭一, 花輪公雄

大会講演予講集, 87 315-315, 2005
レジームシフトの季節発展 (神戸コレクション--デジタル化と研究の展望)

安中さやか, 花輪公雄

海洋, 35(11) 798-803, Nov, 2003
D159 レジームシフトの季節発展(歴史的海上気象観測データ(神戸コレクション)のデジタル化と研究の展望)

安中さやか, 花輪公雄

大会講演予講集, 83 197-197, 2003
北半球海面水温場に見出されたレジームシフト : 熱帯太平洋との関係

安中さやか, 花輪公雄

大会講演予講集, 82 51-51, Oct 9, 2002
北半球海面水温場の長期変動特性--北極振動との関連 (総特集大規模大気海洋相互作用--数十年スケール変動の実態と機構) -- (3章北極海セクターにおける長期変動)

安中さやか, 花輪公雄

号外海洋, (24) 149-156, 2001

Social Activities

CO2 and nutrient variability in surface ocean; Physical oceanography/climate processes; Global distribution of subsurface CHL maximum

Lecturer

CLIVAR-FIO, Summer School on Biogeochemical Processes in Earth System Models, Jul 15, 2024 - Jul 19, 2024
海洋CO2吸収と地球温暖化 -北極海も主要なCO2吸収域-

Lecturer

東北大理学部, 模擬授業, Jun 13, 2024
海洋CO2吸収と地球温暖化 -北極海も主要なCO2吸収域-

Lecturer

東北大理学部, ぶらりがく, Mar 31, 2023

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