On the mechanism of the long-term trend of the oceanic CO2 in the equatorial Pacific Ocean

• Project/Area Number: 22310017
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Japan, Meteorological Research Institute
• Principal Investigator: ISHII Masao 気象庁気象研究所, 気象庁気象研究所, 室長 (70354553)
• Co-Investigator(Kenkyū-buntansha): SASANO Daisuke 気象研究所, 地球化学研究部, 地球化学研究部 (10462524) ; KOSUGI Naohiro 気象研究所, 地球化学研究部, 研究官 (20553168) ; SUZUKI Toru (財)日本水路協会海洋情報研究センター, 研究開発部, 部長 (10360736)
• Co-Investigator(Renkei-kenkyūsha): MIDORIKAWA Takashi 気象研究所, 地球化学研究部, 地球化学研究部 (10414517)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000); Fiscal Year 2012: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2011: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000); Fiscal Year 2010: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
• Keywords: 化学海洋 / 海洋酸性化 / 太平洋 / 熱帯 / 二酸化炭素 / 全炭酸濃度 / 全アルカリ度 / 国際研究者交流（アメリカ合衆国） / 国際情報交換（アメリカ合衆国、カナダ） / 海洋科学 / 環境変動 / 気候変動 / 地球化学 / 海洋物理・陸水学 / 太平洋赤道域 / 海洋物質循環

Research Abstract

While improving the methods for the measurement of ocean CO_2 system parameters, we made measurements of these parameters in the surface and in the interior of the equatorial Pacific. We also prepared the database “PACIFICA” for the ocean CO_2 system and biochemical parameters in the Pacific Ocean through the international cooperation under the North Pacific Marine Science Organization (PICES). Using the PACIFICA database, we have demonstrated that CO_2 content in seawater is increasing and ocean acidification is occurring significantly in the tropical zone of the Pacific Ocean due to anthropogenic CO_2 emissions. The transport of anthropogenic CO_2 from the subtropical zones in the North and South Pacific through the shallow meridional overturning circulation is considered to be a key process controlling the CO_2 increase and ocean acidification in the western Pacific tropical regions

Research Products

• [Journal Article] Recent deceleration of oceanic pCO_2 increase in the western North Pacific in winter (2012)
  • Author(s): Midorikawa, T., M. Ishii, N. Kosugi, D. Sasano 他5名
  • Journal Title: Geophys. Res. Lett Volume: 39
  • Peer Reviewed
• [Journal Article] Decrease of dissolved oxygen after the mid-1980s in the western North Pacific subtropical gyre along the 137°E repeat section (2012)
  • Author(s): Takatani, Y., D. Sasano, T. Nakano, T. Midorikawa, M. Ishii
  • Journal Title: Global Biogeochem. Cycles Volume: 26 Issue: 2
  • DOI: 10.1029/2011gb004227
  • Peer Reviewed
• [Journal Article] Ocean acidification off the south coast of Japan : A result from time series observation of CO2 parameters from 1994 to 2008 (2012)
  • Author(s): Ishii, M., Yoshikawa-inoue, H., et al.
  • Journal Title: Journal of Geophysical Research Volume: 116 Issue: C6
  • DOI: 10.1029/2010jc006831
  • Peer Reviewed
• [Journal Article] Recent deceleration of oceanic pCO2 increase in the western North Pacific in winter. (2012)
  • Author(s): Midorikawa, T., M. Ishii, N. Kosugi, D. Sasano, T. Nakano, S. Saito, N. Sakamoto, H. Nakano, H. Y. Inoue
  • Journal Title: Geophyical Research Letters Volume: 39 Issue: 12
  • DOI: 10.1029/2012gl051665
  • NAID: 120005039169
  • Peer Reviewed
• [Journal Article] Testing a new quick response oxygen sensor, "RINKO" (2011)
  • Author(s): Sasano, D., M. Ishii, T. 他3名
  • Journal Title: Papers in Meteorology and Geophysics Volume: 62 Pages: 63-73
  • DOI: 10.2467/mripapers.62.63
  • NAID: 130004718858
  • ISSN: 0031-126X, 1880-6643
  • Peer Reviewed
• [Journal Article] C. L. Sabine, Expanding carbon data collection from the ocean's interior (2011)
  • Author(s): Tanhua, T., R. M. Key, M. Hoppema, A. Olsen, M. Ishii
  • Journal Title: Eos Volume: 91(48) Issue: 48 Pages: 457-458
  • DOI: 10.1029/2010eo480002
• [Journal Article] Ocean acidification in the subtropical North Pacific estimated from accumulated carbonate data (2011)
  • Author(s): Midorikawa, T., M.Ishii, D.Sasano, N.Kosugi, H.Sugimoto, N.Hiraishi, S.Masuda, T.Suzuki, T.R.Takamura, H.Y.Inoue
  • Journal Title: Papers in Meteorology and Geophysics Volume: 62 Pages: 47-56
  • DOI: 10.2467/mripapers.62.47
  • NAID: 130004484929
  • ISSN: 0031-126X, 1880-6643
  • Peer Reviewed
• [Journal Article] Uptake mechanism of anthropogenic CO2 in the Kuroshio Extension region in an ocean general circulation model (2011)
  • Author(s): Nakano, H.
  • Journal Title: Journal of Oceanography Volume: 67 Issue: 6 Pages: 765-783
  • DOI: 10.1007/s10872-011-0075-7
  • URL: http://link.springer.com/article/10.1007%2Fs10872-011-0075-7 http://link.springer.com/article/10.1007/s00382-012-1641-4#
  • Peer Reviewed
• [Journal Article] Mode waters : uptake windows of atmospheric CO_2 into the ocean interior (2011)
  • Author(s): Ishii, M.
  • Journal Title: SOLAS Newsletter Volume: 12 Pages: 14-15
• [Journal Article] Expanding carbon data collection from the Ocean's Interior (2011)
  • Author(s): Tanhua, T., R.M.Key, M.Hoppema, A.Olsen, M.Ishii, C.L.Sabine
  • Journal Title: EOS Volume: 91,48 Pages: 457-458
• [Journal Article] Pacific Ocean Interior Carbon Data Synthesis, PACIFICA, in progress (2011)
  • Author(s): Ishii, M., T.Suzuki, R.M.Key
  • Journal Title: PICES Press Volume: 19 Pages: 20-23
• [Journal Article] Ocean acidification in the subtropical North Pacific estimated from accumulated carbonate data. (2011)
  • Author(s): Midorikawa, T., M.Ishii, D.Sasano, N.Kosugi, H.Sugimoto, et al.
  • Journal Title: Papers in Meteorology and Geophysics Volume: (in press)
  • NAID: 130004484929
  • Peer Reviewed
• [Journal Article] Expanding Carbon Data Collection From the Ocean's Interior (2011)
  • Author(s): T.Tanhua, R.M.Key, M.Hoppema, A.Olson, M.Ishii, C.L.Sabine
  • Journal Title: EOS Volume: 91(48) Pages: 457-458
• [Journal Article] Mode waters : uptake windows of atmospheric CO_2 into the ocean interior (2011)
  • Author(s): Masao Ishii
  • Journal Title: SOLAS News 12 Volume: 12 Pages: 14-15
• [Journal Article] Pacific Ocean Interior Carbon Data Synthesis, PACIFICA, in progress (2011)
  • Author(s): Masao Ishii, T.Suzuki, R.M.Key
  • Journal Title: PICKS Press Volume: 19 Pages: 20-23
• [Journal Article] Assessing the internal consistency of the CARINA data base in the Pacific (2010)
  • Author(s): Sabine, C.L., M.Hoppema, R.M.Key, B.Tilbrook, S.van Heuven, C.Lo Monaco, N.Metzl, M.Ishii, A.Murata, S.Musielewicz
  • Journal Title: Earth System Science Data Volume: 2 Pages: 195-204
  • Peer Reviewed
• [Journal Article] Seasonal and inter-annual variations in pCO_2sea and air-sea CO_2 fluxes in mid-latitudes of the western and eastern North Pacific during 1999-2006 : recent results utilizing voluntary observation ships (2010)
  • Author(s): Takamura, T.R., H.Y.Inoue, T.Midorikawa, M.Ishii, Y.Nojiri
  • Journal Title: Journal of Meteorological Society of Japan Volume: 88 Pages: 883-898
  • Peer Reviewed
• [Journal Article] Decreasing pH trend estimated from 25-yr time series of carbonate parameters in the western North Pacific (2010)
  • Author(s): Midorikawa, T., M.Ishii, S.Saito, D.Sasano, N.Kosugi, et al.
  • Journal Title: Tellus B Volume: 62 Pages: 649-659
  • Peer Reviewed
• [Presentation] Ocean acidification in the tropical Pacific from below (2013)
  • Author(s): Ishii, M. et al.
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京(中国)
  • Year and Date: 2013-06-06
• [Presentation] Oxygen Decrease with Bidecadal Oscillations in the Northwestern Pacific (2013)
  • Author(s): D. Sasano, Y. Takatani, N. Kosugi, Y. Takatani, N. Kosugi, T. Nakano, T. Midorikawa, M. Ishii
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京（中国）
• [Presentation] Long-term variability of sea-air CO2 flux distribution over the global ocean analyzed by JMA (2013)
  • Author(s): Iida, Y., A. Kojima, K. Enyo, Y.Takatani, T. Nakano, N. Kosugi, D. Sasano, M. Ishii, T. Midorikawa
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京（中国）
• [Presentation] PACIFICA: Pacific Ocean interior carbon data synthesis (2012)
  • Author(s): Suzuki, T.et al.
  • Organizer: PICES 2012 Annual Meeting
  • Place of Presentation: 広島
  • Year and Date: 2012-10-16
• [Presentation] Re-emergence of anthropogenic carbon and Pacific warm pool acidification (2012)
  • Author(s): Rodgers, K., M. Ishii, et al.
  • Organizer: PICES 2012 Annual Meeting
  • Place of Presentation: 広島
  • Year and Date: 2012-10-16
• [Presentation] Decadal change in the rate of ocean acidification in the western Pacific equatorial zone (2012)
  • Author(s): Ishii, M. et al.
  • Organizer: Third symposium in the ocean in a high-CO_2 world
  • Place of Presentation: モントレー(アメリカ)
  • Year and Date: 2012-09-25
• [Presentation] Decadal trend of acidification in the North Pacific subtropical mode water and its connection with climate variability (2012)
  • Author(s): Kosugi, N. et al.
  • Organizer: Third symposium in the ocean in a high-CO_2 world
  • Place of Presentation: モントレー(アメリカ)
  • Year and Date: 2012-09-25
• [Presentation] pH直接測定の時系列データが捉えた東経137度線における海洋酸性化 (2012)
  • Author(s): 小杉如央, 笹野大輔, 石井雅男, 延与和敬, 増田信次, 緑川貴
  • Organizer: 2011年度日本海洋学会秋季大会
  • Place of Presentation: 九州大学筑紫キャンパス(福岡県)
  • Year and Date: 2012-09-24
• [Presentation] An overview of the ocean CO_2 increase in the western North Pacific subtropical and tropical zones (2012)
  • Author(s): Ishii, M. et al.
  • Organizer: 2nd International Symposium Effects of Climate Change on the World's Oceans
  • Place of Presentation: 麗水(韓国)
  • Year and Date: 2012-05-19
• [Presentation] Oxygen decrease in the western Pacific along 165oE (2012)
  • Author(s): Sasano, D. et al.
  • Organizer: International Symposium Effects of Climate Change on the World's Oceans
  • Place of Presentation: 麗水(韓国)
  • Year and Date: 2012-05-19
• [Presentation] Mode waters: the uptake window of natural and anthropogenic CO_2 into the ocean interior (2012)
  • Author(s): Ishii, M. et al.
  • Organizer: Ocean Sciences Meeting 2012
  • Place of Presentation: ソルトレイクシティー(アメリカ)
  • Year and Date: 2012-02-24
• [Presentation] Mode waters : the uptake window of natural and anthropogenic CO_2 into the ocean interior (2012)
  • Author(s): Ishii, M., D.Sasano, N.Kosugi, T.Midorikawa, K.B.Rodgers
  • Organizer: Ocean Sciences Meeting 2012
  • Place of Presentation: ソルトレイクコンベンションセンクー(米国ユタ州・ソルトレイクシティー)
  • Year and Date: 2012-02-24
• [Presentation] PACIFICA : Pacific Ocean Interior Carbon Data Synthesis (2012)
  • Author(s): Suzuki, T., M.Ishii, T.Ono, T.Kawano, M.Wakita, L.A.Miller, A.Murata, K.Sasaki, J.R.Christian, R.M.Key
  • Organizer: Ocean Sciences Meeting 2012
  • Place of Presentation: ソルトレイクコンベンションセンター(米国ユタ州・ソルトレイクシティー)
  • Year and Date: 2012-02-24
• [Presentation] Oxygen decrease in the western Pacific along 165°E. (2012)
  • Author(s): Sasano, D., M. Ishii, T. Midorikawa, Y. Takatani, T. Nakano, T. Tokieda, H. Kamiya
  • Organizer: 2nd International Symposium Effects of Climate Change on the World’s Oceans
  • Place of Presentation: 麗水(韓国）
• [Presentation] Slowdown of ocean acidification in the subtropical western North Pacific due to ocean circulation change. (2012)
  • Author(s): Enyo, K., T. Nakano, Y. Takatani, Y. Iida, A. Kojima, N. Kosugi, D. Sasano, M. Ishii, T. Midorikawa
  • Organizer: Third Symposium the Ocean in a Hgh-CO2 World
  • Place of Presentation: モントレー（アメリカ）
• [Presentation] Decadal trend of acidification in the North Pacific subtropical mode water and its connection with climate variability. (2012)
  • Author(s): Kosugi, N., D. Sasano, M. Ishii, K. Enyo, T. Nakano, T. Midorikawa
  • Organizer: Third Symposium the Ocean in a Hgh-CO2 World
  • Place of Presentation: モントレー（アメリカ）
• [Presentation] Comparison with carbon data syntheses in the Pacific Ocean. (2012)
  • Author(s): Suzuki, T., M. Ishii, T. Ono, T. Kawano, M. Wakita, L. Miller, A. Murata, K. Sasaki, J. Christian, R. M. Key
  • Organizer: Third Symposium the Ocean in a Hgh-CO2 World
  • Place of Presentation: モントレー（アメリカ）
• [Presentation] Decadal ocean acidification detected in western North Pacific (2011)
  • Author(s): Kosugi, N., D.Sasano, M.Ishii, S.Saito, S.Masuda, K.Enyo, T.Midorikawa
  • Organizer: Joint SOLAS/IMBER/IOCCP Carbon Synthesis Meeting, The Ocean Carbon Cycle at a time of change : Synthesis and vulnerabilities
  • Place of Presentation: ユネスコ本部(フランス・パリ)(招待講演)
  • Year and Date: 2011-09-15
• [Presentation] Significant decrease of dissolved oxygen in the western Pacific along 165°E (2011)
  • Author(s): Sasano, D., M.Ishii, N.Kosugi, T.Midorikawa, Y.Takatani, T.Nakano, T.Tokieda, H.Kamiya
  • Organizer: Joint SOLAS/IMBER/IOCCP Carbon Synthesis Meeting, The Ocean Carbon Cycle at a time of change : Synthesis and vulnerabilities
  • Place of Presentation: ユネスコ本部(フランス・パリ)
  • Year and Date: 2011-09-15
• [Presentation] Interior carbon changes in the Pacific Pacific. Joint SOLAS/IMBER/IOCCP Carbon Interior carbon changes in the Pacific. Joint SOLAS/IMBER/IOCCP Carbon synthesis meeting (2011)
  • Author(s): Ishii, M
  • Organizer: Joint SOLAS/IMBER/IOCCP Carbon synthesis meeting, The ocean carbon cycle at a time of change: synthesis and vulnerabilities
  • Place of Presentation: ハ?リ(フランス)
  • Year and Date: 2011-09-14
• [Presentation] Interior carbon changes in the Pacific (2011)
  • Author(s): Ishii, M.
  • Organizer: Joint SOLAS/IMBER/IOCCP Carbon Synthesis Meeting, The Ocean Carbon Cycle at a time of change : Synthesis and vulnerabilities
  • Place of Presentation: ユネスコ本部(フランス・パリ)(招待講演)
  • Year and Date: 2011-09-14
• [Presentation] RECCAP regional synthesis for Pacific Ocean (2011)
  • Author(s): Ishii, M., R.A.Feely
  • Organizer: Regional Carbon Cycle and Processes Final Workshop
  • Place of Presentation: アメリカ国立保護トレーニングセンター(シェファーズタウン,ウェストバージニア)(招待講演)
  • Year and Date: 2011-05-23
• [Presentation] 海洋炭素循環研究におけるArgoの活用可能性について (2010)
  • Author(s): 石井雅男
  • Organizer: 第2回アルゴ将来構想検討会
  • Place of Presentation: 東京大学大気海洋研究所(柏市)
  • Year and Date: 2010-11-19
• [Presentation] Air-Sea CO_2 flux and CO_2 storage in the equatorial and North Pacific Ocean. Workshop (2010)
  • Author(s): Ishii, M
  • Organizer: Regional Carbon Cycle Assessment on Land and Oceans
  • Place of Presentation: ヒ?テルホ?(イタリア)
  • Year and Date: 2010-10-07
• [Presentation] Air-Sea CO_2 flux and CO_2 storage in the equatorial and North Pacific Ocean (2010)
  • Author(s): Ishii, M.
  • Organizer: Workshop "Regional Carbon Cycle Assessment on Land and Oceans"
  • Place of Presentation: ビテルボ(イタリア)
  • Year and Date: 2010-10-07
• [Presentation] 東経165度線における溶存酸素の長期トレンド (2010)
  • Author(s): 笹野大輔, 石井雅男, 緑川貴, 高谷祐介, 時枝隆之, 中野俊也
  • Organizer: 2010年度日本海洋学会秋季大会
  • Place of Presentation: 東京農業大学(網走市)
  • Year and Date: 2010-09-08
• [Presentation] An overview of the ocean CO2 increase in the western North Pacific subtropical and tropical zones.
  • Author(s): Ishii, M., T. Midorikawa, D. Sasano, N. Kosugi, T. Nakano, H. Y. Inoue
  • Organizer: 2nd International Symposium Effects of Climate Change on the World’s Oceans
  • Place of Presentation: 麗水（韓国）
  • Invited
• [Presentation] Decadal change in the rate of ocean acidification in the western Pacific equatorial zone.
  • Author(s): Ishii, M., N. Kosugi, D. Sasano, K. Enyo, S. Saito, T. Nakano, T. Midorikawa, H. Y. Inoue
  • Organizer: Third Symposium the Ocean in a Hgh-CO2 World
  • Place of Presentation: モントレー（アメリカ）
• [Presentation] An acidification in the North Pacific subtropical mode water and its relation with climate variability.
  • Author(s): Kosugi, N., D. Sasano, M. Ishii, K. Enyo, T. Nakano, T. Midoriakwa
  • Organizer: PICES 2012 Annual Meeting
  • Place of Presentation: 広島市
• [Presentation] 北太平洋西部亜熱帯域・熱帯域における海洋酸性化動向について
  • Author(s): 石井雅男, 笹野大輔, 小杉如央, 延与和敬, 中野俊也, 緑川貴, 吉川久幸
  • Organizer: 東京大学大気海洋研究所共同利用シンポジウム「ﾊﾞｲｵﾐﾈﾗﾘｾﾞｰｼｮﾝと石灰化－遺伝子から地球環境まで―」
  • Place of Presentation: 柏市
  • Invited
• [Presentation] 白鳳丸KH11-10航海で観測された南半球亜熱帯域における海水中pCO2/pO2の日周変動について
  • Author(s): 小杉如央, 笹野大輔, 石井雅男, 吉川久幸
  • Organizer: 第18回大気化学討論会
  • Place of Presentation: 朝倉市
• [Presentation] Hydrographic and hydrochemical time-series observations along 137°E and 165°E sections by the Japan Meteorological Agency (JMA).
  • Author(s): Takatani, Y., M. Ishii
  • Organizer: An international time-series methods workshop
  • Place of Presentation: ハミルトン（バミューダ）
  • Invited
• [Presentation] Re-emergence of anthropogenic carbon and pacific warm pool acidification.
  • Author(s): Rodgers, K. B., M. Ishii, D. Iudicone, O. Aumont, M. C. Long
  • Organizer: PICES 2012 Annual Meeting
  • Place of Presentation: 広島市
• [Presentation] Recent slowdown of wintertime oceanic pCO2 increase in the western North Pacific.
  • Author(s): Nakano, T., T. Midorikawa, T. Kitamura, Y.Takatani, K. Enyo, M. Ishii, H. Y. Inoue
  • Organizer: PICES 2012 Annual Meeting
  • Place of Presentation: 広島市
• [Presentation] Decrease of dissolved oxygen due to warming and other factors in the western North Pacific
  • Author(s): Takatani, Y., D. Sasano, T. Nakano, T. Midorikawa, M. Ishii
  • Organizer: PICES 2012 Annual Meeting
  • Place of Presentation: 広島市
• [Presentation] PACIFICA: Pacific Ocean Interior Carbon Data Synthesis.
  • Author(s): Suzuki, T., M. Ishii, T. Ono, T. Kawano, M. Wakita, L. A. Miller, A. Murata, K. Sasaki, J. Christian, R. M. Key
  • Organizer: PICES 2012 Annual Meeting
  • Place of Presentation: 広島市
• [Presentation] Ocean acidification in the tropical pacific from below
  • Author(s): M. Ishii, D. Sasano, N. Kosugi, H. Y. Inoue, K. B. Rodgers, D. Iudicone, H. Nakano, M. C. Long, J. Kleypas
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京（中国）
• [Presentation] Spatial and temporal variability of ocean acidification in the interior western North Pacific
  • Author(s): N. Kosugi, D. Sasano, M. Ishii, K. Enyo, Y. Iida
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京（中国）
• [Presentation] Large changes in seasonality of the surface ocean carbon cycle under anthropogenic climate change
  • Author(s): Rodgers, K., M. Ishii, T. Froelicher, D. Iudicone, Y. Plancherel, O. Aumont, L. Bopp, J. P. Dunne, T. Gorgues, A. Gnanadesikan, M. Kawamiya, H. Okajima, R. Wanninkhof
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京（中国）
• [Presentation] The oceanic accumulation of anthropogenic CO2 since the mid 1990s
  • Author(s): Gruber, N., D. Clement, T.Tanhua, M. Ishii, R. Key, K. Rodgers, R. A. Feely, R. Wanninkhof, C. Sabine, S. van Heuven, M. Hoppema, F. Perez, C. Le Monaco, S. Lauvset
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京（中国）
• [Presentation] GLODAPv2 – a global and quality controlled ocean biogeochemical data product
  • Author(s): Lauvset, S. K., R. Key, A. Olsen, T. Tanhua, M. Hoppema, S. Jutterstroum, R. Steinfeldt, E. Jeansson, A. Kozyr, B. Pfeil, T. Suzuki, M. Ishii
  • Organizer: 9th International Carbon Dioxide Conference
  • Place of Presentation: 北京（中国）
• [Book] 図説 地球環境 (2013)
  • Author(s): 石井雅男（分担執筆）
  • Publisher: 朝倉書店
• [Book] 図説地球環境
  • Author(s): 石井雅男(共同執筆)
  • Publisher: 朝倉書店 (出版確定)