DMS flux in the North Pacific subpolar region

2008 Fiscal Year Final Research Report

• Project/Area Number: 18310001
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Hokkaido University
• Principal Investigator: WATANABE Yutaka Hokkaido University, 大学院・地球環境科学研究院, 准教授 (90333640)
• Co-Investigator(Kenkyū-buntansha): ONO Tsuneo 水産総合研究センター, 北海道区水産研究所, 室長 (40371786) ; NIKI Takushi 立正大学, 地球環境科学部, 助教 (00339607) ; NORIKI Shinichiro 北海道大学, 大学院・地球環境科学研究院, 教授 (80109511)
• Project Period (FY): 2006 – 2008
• Keywords: DMS / 北太平洋 / 温室効果気体

Research Abstract

北太平洋高度海域の沿岸・外洋において、地球温暖化抑制物質であるDMS(ジメチルサルファイド)濃度について、植物プランクトン・クロロフィル・色素データと炭酸物質等とともに、世界で初めての周年規模の時系列観測を試みた。その結果、DMSの北太平洋における月別の詳細な空間分布を描き出すことに成功し、さらに、北太平洋全体でその表層濃度ならびに大気への逃散速度がここ30年で増加して傾向にあることを明らかとした。

Research Products

• [Journal Article] Indentifying crucial issues in climate science : drastic change in the Earth system during global warming. (2009)
  • Author(s): Ikeda, M., Greve, R., Hara, T., Watanabe, Y.W., Ohmura, A., Kawamiya, M.
  • Journal Title: EOS Transactions 90(2) Pages: 15
  • Peer Reviewed
• [Journal Article] Time series of carbonate system variables off Otaru coast in Hokkaido, Japan (2008)
  • Author(s): Sakamoto, A., Watanabe, Y. W., Osawa, M., Kido, K., Noriki, S.
  • Journal Title: Estuarine, Coastal and Shelf Science 79 Pages: 377-386
  • Peer Reviewed
• [Journal Article] Reconstruction of sea surface dimethylsulfide in the North Pacific during 1970s to 2000s (2007)
  • Author(s): Watanabe, Y. W., Yoshinari, H., Sakamoto, A., Nakano, Y., Kasamatsu, N., Midorikawa,T., Ono, T.
  • Journal Title: Marine Chemistry 103 Pages: 347-358
  • Peer Reviewed
• [Journal Article] Effects of salinity downshock on dimethylsulfide production (2007)
  • Author(s): Niki, T., Shimizu, M., Fujishiro, A., Kinoshita, J.
  • Journal Title: Journal of Oceanography 63 Pages: 873-877
  • Peer Reviewed
• [Journal Article] Establishment of long-term preservation for demethylsulfide by the solid-phase micro extraction method (2006)
  • Author(s): Sakamoto, A., Niki, T., Watanabe, Y. W.
  • Journal Title: Analytical Chemistry 78 Pages: 4593-4597
  • Peer Reviewed
• [Presentation] 北西部北太平洋における海水中のジメチルサルファイドの鉛直分布の解明に関する研究 (2008)
  • Author(s): 本間則仁, 渡辺豊, 坂本愛
  • Organizer: 2008年度日本地球化学会年会
  • Place of Presentation: 東京(東京大学)
  • Year and Date: 2008-09-18
• [Presentation] Decadal change in N/P/Si ratio over the North Pacific subpolar region (2007)
  • Author(s): Watanabe, Y. W. (2007)
  • Organizer: North Pacific Marine Science Organization 16 Annual Meeting
  • Place of Presentation: Victoria, Canada
  • Year and Date: 2007-11-04
• [Presentation] 北太平洋亜寒帯域における海洋化学成分の長期変動の東西比較 (2007)
  • Author(s): 渡辺豊, 田所和明
  • Organizer: 日本海洋学会2007春季大会
  • Place of Presentation: 東京(東京海洋大学)
  • Year and Date: 2007-03-28
• [Presentation] The Change of dimethylsulfide (DMS) in the western North Pacific by using solid-phase micro extraction method (2006)
  • Author(s): Sakamoto, A., Niki, T., Watanabe, Y. W.
  • Organizer: Western Pacific Geophysical Meeting
  • Place of Presentation: Beijing, China
  • Year and Date: 2006-07-15