Studies on decadal variation of the anthropogenic CO2 in the ocean by means of observed and simulated radiocarbon.

• Project/Area Number: 21310018
• 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 Agency for Marine-Earth Science and Technology
• Principal Investigator: KUMAMOTO Yuichiro 独立行政法人海洋研究開発機構, 地球環境変動領域, 技術研究副主幹 (70359157)
• Co-Investigator(Kenkyū-buntansha): MURATA Akihiko 独立行政法人海洋研究開発機構, 地球環境変動領域, チームリーダー (60359156) ; ISHIDA Akio 富士常葉大学, 社会環境学部, 教授 (60359148) ; AITA Maki 独立行政法人海洋研究開発機構, 地球環境変動領域, 技術研究副主任 (90463091) ; NAKAYAMA Noriko 東京大学, 大気海洋研究所・海洋化学部門・海洋無機化学分野, 助教 (60431772)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000); Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2010: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000); Fiscal Year 2009: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
• Keywords: 人為起源二酸化炭素 / 海洋炭素循環 / 炭素14 / 化学トレーサ / 気候変動 / 海洋科学 / 地球化学 / 地球温暖化

Research Abstract

We compared the observational and model simulation results of the bomb-produced radiocarbon and anthropogenic carbon in the ocean. The model simulation results agree well with the observational ones qualitatively. However the ocean model overestimates or underestimates the bomb radiocarbon in some regions. This implies that the CO2 gas exchange at sea surface and thermocline circulation in the ocean model could be improved.

Research Products

• [Journal Article] Temporal and spatial variations in bomb-produced radiocarbon along BEAGLE2003 lines. revisits of WHP P06, A10, and I03/I04 in the Southern Hemisphere (2011)
  • Author(s): Kumamoto, Yuichiro, Akihiko Murata, Shuichi Watanabe, Masao Fukasawa
  • Journal Title: Prog. Oceanogr. Volume: 89 Pages: 49-60
  • URL: http://www.sciencedirect.com/science/article/pii/S007966111000159X.
  • Peer Reviewed
• [Journal Article] Decadal increases in anthropogenic CO2 along 20oS in the South Indian Ocean (2010)
  • Author(s): Murata Akihiko, Yuichiro. Kumamoto, Ken' ichi Sasaki, Shuichi Watanabe and Masao Fukasawa
  • Journal Title: J. Geophys. Res Volume: 115 Issue: C12
  • DOI: 10.1029/2010jc006250
  • Peer Reviewed
• [Journal Article] Decadal increases in anthropogenic CO_2 along 20°S in the South Indian Ocean (2010)
  • Author(s): Akihiko Murata
  • Journal Title: Journal of Geophysical Research Volume: 115
  • Peer Reviewed
• [Journal Article] Temporal and spatial variations in bomb-produced radiocarbon along BEAGLE2003 lines ; revisits of WHP P06, A10, and I03/I04 in the Southern Hemisphere (2010)
  • Author(s): Yuichiro Kumamoto
  • Journal Title: Progress in Oceanography (印刷中)
  • Peer Reviewed
• [Journal Article] Decadal increases of anthropogenic CO2 along 149°E in the western North Pacific. (2009)
  • Author(s): Murata, Akihiko, Yuichiro Kumamoto, Ken' ichi Sasaki, Shuichi Watanabe and Masao Fukasawa
  • Journal Title: J. Geophys. Res Volume: 114
  • Peer Reviewed
• [Presentation] 温室効果気体の循環と気候応答、生態系への影響の解明 (2012)
  • Author(s): 村田昌彦
  • Organizer: 2012年度日本海洋学会春季大会
  • Place of Presentation: 筑波大学、つくば市
  • Year and Date: 2012-03-30
• [Presentation] 温室効果気体の循環と気候応答、生態系への影響の解明 (2012)
  • Author(s): 村田昌彦, 他
  • Organizer: 2012年度日本海洋学会春季大会
  • Place of Presentation: つくば大学、つくば市
  • Year and Date: 2012-03-30
• [Presentation] Interannual variability of anthropogenic and natural air-sea CO2 fluxes in the Pacific Ocean (2012)
  • Author(s): Akio Ishida
  • Organizer: Ocean Sciences Meeting 2012
  • Place of Presentation: Salt Palace Convention Center, Salt Lake City
  • Year and Date: 2012-02-20
• [Presentation] Interannual variability of anthropogenic and natural air-sea CO2 fluxes in the Pacific Ocean (2012)
  • Author(s): Akio Ishida, et al
  • Organizer: Ocean Sciences Meeting 2012
  • Place of Presentation: Salt Palace Convent Center, Salt Lake Conty
  • Year and Date: 2012-02-20
• [Presentation] 1990年代から2000年代かけての太平洋における核実験起源炭素14の変動 (2011)
  • Author(s): 熊本雄一郎
  • Organizer: 2011年度日本海洋学会秋季大会
  • Place of Presentation: 九州大学、春日市
  • Year and Date: 2011-09-28
• [Presentation] 海水中溶存窒素安定同位体比を用いたアラビア海酸素極小層における脱窒素量の見積もり (2011)
  • Author(s): 中山典子
  • Organizer: 2011年度日本海洋学会秋季大会
  • Place of Presentation: 九州大学、春日市
  • Year and Date: 2011-09-28
• [Presentation] アラビア海における溶存酸素の酸素安定同位体比δ18Oからみた生物および物理過程 (2011)
  • Author(s): 中山典子
  • Organizer: 2011年度日本地球化学会
  • Place of Presentation: 北海道大学、札幌市
  • Year and Date: 2011-09-14
• [Presentation] Decadal changes in the bomb-produced radiocarbon in the Pacifie Ocean from the 1990s to 2000s (2011)
  • Author(s): Yuichiro Kumamoto, et al
  • Organizer: ICNC11-FSKD11
  • Place of Presentation: Galaxy Hotel, Shanghai
  • Year and Date: 2011-07-28
• [Presentation] Decadal changes in the bomb-produced radiocarbon in the Pacific Ocean from the 1990s to 2000s (2011)
  • Author(s): Yuichiro Kumamoto
  • Organizer: ICNC11-FSKD11
  • Place of Presentation: Galaxy Hotel, Shanghai
  • Year and Date: 2011-06-28
• [Presentation] Development of non-toxic reference material for oceanic inorganic carbonate system parameters (2011)
  • Author(s): Akihiko Murata
  • Organizer: ICAS2011
  • Place of Presentation: Kyoto International Conference Center, Kyoto
  • Year and Date: 2011-05-22
• [Presentation] 北太平洋における溶存無機炭素中の核実験起源炭素14-2005/2007年の観測結果から (2011)
  • Author(s): 熊本雄一郎
  • Organizer: 第13回AMSシンポジウム
  • Place of Presentation: 山形市、ホテルキャッスル
  • Year and Date: 2011-01-28
• [Presentation] A comparison of dissolved oxygen concentration inintermediate layer between the western and eastern subarctic gyres of the North Pacific from 1985 to 2007 (2010)
  • Author(s): Yuichiro Kumamoto
  • Organizer: 2010 PICES Annual Meeting
  • Place of Presentation: the Oregon Convention Center, Portland
  • Year and Date: 2010-10-28
• [Presentation] A comparison of dissolved oxygen concentration in intermediate layer between the western and eastern subarctic gyres of the North Pacific from 1985 to 2007 (2010)
  • Author(s): Yuichiro Kumamoto
  • Organizer: 2010 PICES Annual Meeting
  • Place of Presentation: the Oregon Convention Center, Portland, USA.
  • Year and Date: 2010-10-28
• [Presentation] 南半球亜熱帯における核実験起源炭素14とセシウム137の分布 (2009)
  • Author(s): 熊本雄一郎
  • Organizer: 2009年度日本地球化学会年会
  • Place of Presentation: 広島大学、東広島市
  • Year and Date: 2009-09-15
• [Presentation] 南半球亜熱帯における核実験起源炭素14とセシウム137の分布 (2009)
  • Author(s): 熊本雄一郎
  • Organizer: 2009年度日本地球化学会年会
  • Place of Presentation: 広島大学(東広島市)
  • Year and Date: 2009-09-15
• [Presentation] Decadal increases of anthropogenic CO2 along 20S in the South India (2009)
  • Author(s): Akihiko Murata
  • Organizer: 8th International Carbon Dioxide Conference
  • Place of Presentation: the Friedrich Schiller University, Jena
  • Year and Date: 2009-09-13
• [Presentation] Decadal increases of anthropogenic CO_2 along 20S in the South India (2009)
  • Author(s): Akihiko Murata
  • Organizer: 8th International Carbon Dioxide Conference
  • Place of Presentation: the Friedrich-Schiller-University(Jena)
  • Year and Date: 2009-09-13