Dynamics of marine humic-like substances and their roles in marine carbon cycle

• Project/Area Number: 19310003
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: University of Tsukuba
• Principal Investigator: HAMA Takeo University of Tsukuba, 大学院・生命環境科学研究科, 教授 (30156385)
• Co-Investigator(Kenkyū-buntansha): ISHII Masao 気象庁気象研究所, 地球化学研究部, 主任研究員 (70354553)
• Research Collaborator: SHIMOTORI Kouichi 筑波大学, 大学院・生命環境科学研究科, 博士課程 ; OMORI Yuko 筑波大学, 大学院・生命環境科学研究科, 博士課程
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥20,410,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥4,710,000); Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2008: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2007: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
• Keywords: 溶存態有機物 / 腐植物質 / 海洋炭素循環 / 西部北太平洋 / バクテリア生成物 / 固相抽出

Research Abstract

The fluorescent intensity of marine humic-like substances was higher in mid-deep layer than surface layer, indicating that photo-bleaching is important factor controlling the vertical profile. Photo-bleaching also likely controls the molecular weight composition of humic-like substances. Microbial culture experiments revealed that humic-like substances were produced by bacterial metabolic processes.

Research Products

• [Journal Article] Relationship between the seasonal change in fluorescent dissolved organic matter and mixed layer depth in subtropical western North Pacific (2010)
  • Author(s): Y. Omori, T. Hama, M. Ishii, S. Saito
  • Journal Title: Journal of Geophysical Research-Ocean (in press)
  • Peer Reviewed
• [Journal Article] Relationship between the seasonal change in fluorescent dissolved organic matter and mixed layer depth in the subtropical western North Pacific. (2010)
  • Author(s): Omori, Yuko
  • Journal Title: Journal of Geophysical Research-Ocean (印刷中)
  • Peer Reviewed
• [Journal Article] Bacterial production of marine humic-like fluorescent dissolved organic matter and its biogeochemical importance (2009)
  • Author(s): Shimotori, K., Y. Omori, T. Hama
  • Journal Title: Aquatic Microbial Ecology 58 Pages: 55-66
  • Peer Reviewed
• [Journal Article] Degradation and dissolution properties of photosynthetically-produced phytoplankton lipid materials in early diagenesis (2009)
  • Author(s): K. Yoshimura, T. Ogawa, T. Hama
  • Journal Title: Marine Chemistry 114 Pages: 11-18
  • Peer Reviewed
• [Journal Article] Spatial variability and decadal trend of the oceanic CO_2 in the western equatorial Pacific wam/fresh water (2009)
  • Author(s): M. Ishii, H. Y. Inoue, T. Midorikawa, S. Saito, T. Tokieda, D. Sasano, A. Nakadate, K. Nemoto, N, Metzl, C. S. Wong, R. A. Feely
  • Journal Title: Deep-Sea Resarch II 56 Pages: 591-606
  • Peer Reviewed
• [Journal Article] Seasonal and interannual variability of oceanic carbon cycling in the Western and Central Tropical-Subtropical Pacific : A Physical-Biogeochemical Modeling Study (2009)
  • Author(s): M. Fujii, F. Chai, L. Shi, HY. Inoue, M. Ishii
  • Journal Title: Journal of Oceanography 65 Pages: 689-701
  • NAID: 10029031614
  • Peer Reviewed
• [Journal Article] 亜熱帯モード水による大気から海洋へのCO_2吸収 (2009)
  • Author(s): 石井雅男
  • Journal Title: 月刊海洋 425 Pages: 725-730
• [Journal Article] Bacterial production of marine humic-like fluorescent dissolved organic matter and its biogeochemical importance. (2009)
  • Author(s): Shimotori, Kouichi
  • Journal Title: Aquatic Microbial Ecology 58 Pages: 55-66
  • Peer Reviewed
• [Journal Article] Climatological mean and decadal change in surface ocean pCO_2, and net sea-air CO_2 flux over the global oceans (2009)
  • Author(s): Takahashi, Taro
  • Journal Title: Deep-Sea Research II 56 Pages: 554-577
  • Peer Reviewed
• [Journal Article] Spatial variability and decadal trend of the oceanic CO_2 in the western equatorial Pacific warm/fresh water (2009)
  • Author(s): 石井雅男
  • Journal Title: Deep-Sea Research II 56 Pages: 591-606
  • Peer Reviewed
• [Journal Article] Seasonal and Interannual Variability of Oceanic Carbon Cycling in the Western and Central Tropical-Subtropical Pacific : A Physical-Biogeochemical Modeling Study (2009)
  • Author(s): Fujii, Masahiko
  • Journal Title: Journal of Oceanography 65 Pages: 689-701
  • Peer Reviewed
• [Journal Article] Using altimetry to help explain patchy changes in hydrographic carbon measurements (2009)
  • Author(s): Rodgers, Keith
  • Journal Title: Journal of Geophysical Research 114
  • Peer Reviewed
• [Journal Article] 二酸化炭素を吸収する海、その酸性化について (2009)
  • Author(s): 石井雅男
  • Journal Title: 船と海洋気象 52 Pages: 12-13
• [Journal Article] Degradation and dissolution poperties of photosynthetically produced phytoplankton lipid materials in early diagenesis (2009)
  • Author(s): Yoshimura, K., Ogawa, N. and Hama,
  • Journal Title: Marine Chemistry (印刷中)
  • Peer Reviewed
• [Journal Article] Spatial and temporal changes in the concentration of various phosphorus pools and their possible biogeochemical roles in the oligotrophic subtropical western North Pacific (2008)
  • Author(s): S. Lee, M. Ishii, S. Saito, K. Yanagi, T. Hama
  • Journal Title: Journal of Geophysical Research-Ocean 113
  • Peer Reviewed
• [Journal Article] Testing an ocean carbon model with observed sea surface pCO_2 and dissolved inorganic carbon in the tropical Pacific Ocean (2008)
  • Author(s): J. R., Christian, A. Feely, M. Ishii, R. Murtugudde, X. Wong
  • Journal Title: Journal of Geophysical Research 113
  • Peer Reviewed
• [Journal Article] Testing an ocean carbon model with observed sea surface pCO2 and dissolved inorganic carbon in the tropical Pacific Ocean (2008)
  • Author(s): Christian, J. R., R. A. Feely, M. Ishii, R. Murtugudde, and X. Wang
  • Journal Title: Jounal of Gephysical Research 113
  • Peer Reviewed
• [Journal Article] Bioreactivity of peptidoglycan in seawater (2007)
  • Author(s): K. Kitayama, T. Hama, K. Yanagi
  • Journal Title: Aquatic Microbial Ecology 46 Pages: 85-93
  • Peer Reviewed
• [Presentation] 西部北太平洋における海洋酸性化 (2010)
  • Author(s): 石井雅男
  • Organizer: 2010 日本海洋学会春季大会
  • Place of Presentation: 東京
  • Year and Date: 2010-03-26
• [Presentation] Effect of photoirradiation on chemical characteristics of marine humic substances-like fluorescent dissolved organic matter (2010)
  • Author(s): Y. Omori, T. Hama, M. Ishii, S. Saito
  • Organizer: 2010 Ocean Sciences Meeting
  • Place of Presentation: ポートランド (アメリカ)
  • Year and Date: 2010-02-23
• [Presentation] Effect of photoirradiation on chemical characteristics of marine humic substances-like fluorescent dissolved organic matter (2010)
  • Author(s): 大森裕子
  • Organizer: 2010 Ocean Sciences Meeting
  • Place of Presentation: ポートランド(アメリカ)
  • Year and Date: 2010-02-23
• [Presentation] Trend of DIC increase and acidification in the interior of the western North Pacific subtropical gyre (2010)
  • Author(s): 石井雅男
  • Organizer: Ocean Sciences Meeting 2010
  • Place of Presentation: ポートランド(アメリカ)
  • Year and Date: 2010-02-23
• [Presentation] Bacterial production of humic-like fluorescent dissolved organic matter and variation of fluorescent properties among bacterial groups (2010)
  • Author(s): K. Shimotori, T. Hama, K. Watanabe
  • Organizer: 2010 Ocean Sciences Meeting
  • Place of Presentation: ポートランド (アメリカ)
  • Year and Date: 2010-02-22
• [Presentation] Bacterial production of humic-like fluorescent dissolved organic matter and variation of fluorescent properties among bacterial groups (2010)
  • Author(s): 霜鳥孝一
  • Organizer: 2010 Ocean Sciences Meeting
  • Place of Presentation: ポートランド(アメリカ)
  • Year and Date: 2010-02-22
• [Presentation] 親潮・黒潮における溶存酸素の長期トレンド (2009)
  • Author(s): 笹野大輔
  • Organizer: 2009 日本海洋学会秋季大会
  • Place of Presentation: 京都
  • Year and Date: 2009-09-27
• [Presentation] 東経137度線亜熱帯域での低酸素化とその要因 (2009)
  • Author(s): 高谷祐介
  • Organizer: 2009 日本海洋学会秋季大会
  • Place of Presentation: 京都
  • Year and Date: 2009-09-27
• [Presentation] 東経137度の海洋表層・中層における全炭酸増加と酸性化 (2009)
  • Author(s): 石井雅男
  • Organizer: 2009年度日本海洋学会秋季大会
  • Place of Presentation: 京都大学
  • Year and Date: 2009-09-26
• [Presentation] バクテリアによる蛍光性溶存態有物の生産 (2009)
  • Author(s): 霜鳥孝一, 濱健夫, 渡邊圭司
  • Organizer: 2009年度日本海洋学会秋季大会
  • Place of Presentation: 京都大学
  • Year and Date: 2009-09-26
• [Presentation] 防灘における腐植物質の分布と分子量組成 (2009)
  • Author(s): 大森裕子, 濱健夫, 石井雅男, 斉藤秀周
  • Organizer: 2009年度日本海洋学会秋季大会
  • Place of Presentation: 京都大学
  • Year and Date: 2009-09-26
• [Presentation] バクテリアによる蛍光性溶存態有物の生産 (2009)
  • Author(s): 霜鳥孝一
  • Organizer: 2009年度日本海洋学会秋季大会
  • Place of Presentation: 京都
  • Year and Date: 2009-09-26
• [Presentation] 周防灘における腐植物質の分布と分子量組成 (2009)
  • Author(s): 大森裕子
  • Organizer: 2009年度日本海洋学会秋季大会
  • Place of Presentation: 京都
  • Year and Date: 2009-09-26
• [Presentation] 東経137度の海洋表層・中層における全炭酸増加と酸性化 (2009)
  • Author(s): 石井雅男
  • Organizer: 2009 日本海洋学会秋季大会
  • Place of Presentation: 京都
  • Year and Date: 2009-09-26
• [Presentation] Trend of carbon increase and oxygen decrease in the interior of the western North Pacific subtropical gyre (2009)
  • Author(s): M. Ishii
  • Organizer: 8^<th> International Carbon Dioxide Conference
  • Place of Presentation: イエナ (ドイツ)
  • Year and Date: 2009-09-13
• [Presentation] Oxygen decrease in the western Pacific along 165°E (2009)
  • Author(s): 笹野大輔
  • Organizer: 8^<th> International Carbon Dioxide Conference
  • Place of Presentation: イエナ(ドイツ)
  • Year and Date: 2009-09-13
• [Presentation] Trend of carbon increase and oxygen decrease in the interior of the western North Pacific subtropical gyre (2009)
  • Author(s): 石井雅男
  • Organizer: 8^<th> International Carbon Dioxide Conference
  • Place of Presentation: イエナ(ドイツ)
  • Year and Date: 2009-09-13
• [Presentation] Temporal variation of ^<13>C/^<12>C and concentration of DIC in the western North Pacific Subtropical Gyre (2009)
  • Author(s): Takamura, Tomomi
  • Organizer: 8^<th> International Carbon Dioxide Conference
  • Place of Presentation: イエナ(ドイツ)
  • Year and Date: 2009-09-13
• [Presentation] Trend of DIC increase in the western North Pacific subtropical gyre during 1994-2008 Decadal Variations of the Ocean's (2009)
  • Author(s): M. Ishii
  • Organizer: Interior CarbonCycle : Synthesis and Vulnerabilities
  • Place of Presentation: アスコナ (スイス)
  • Year and Date: 2009-07-13
• [Presentation] Trend of DIC increase in the western North Pacific subtropical gyre during 1994-2008 (2009)
  • Author(s): 石井雅男
  • Organizer: Decadal Variations of the Ocean's Interior Carbon Cycle : Synthesis and Vulnerabilities
  • Place of Presentation: アスコナ(スイス)
  • Year and Date: 2009-07-13
• [Presentation] 亜熱帯モード水におけるCO_2の増加傾向 (2009)
  • Author(s): 石井雅男
  • Organizer: 東京大学海洋研究所共同利用研究集会
  • Place of Presentation: 東京
  • Year and Date: 2009-06-05
• [Presentation] 東経137度における表面全炭酸濃度の増加と酸性化 (2009)
  • Author(s): 石井雅男
  • Organizer: 2009年度日本海洋学会春季大会
  • Place of Presentation: 東京大学
  • Year and Date: 2009-04-06
• [Presentation] 東経137度における表面全炭酸濃度の増加と酸性化 (2009)
  • Author(s): 石井雅男
  • Organizer: 2009 日本海洋学会春季大会
  • Place of Presentation: 東京
  • Year and Date: 2009-04-06
• [Presentation] Trend of oceanic CO_2 increase in the Pacific shallow meridional overturning circulation domain being investigated by high-frequency observations (2009)
  • Author(s): M. Ishii
  • Organizer: International Workshop on the North Pacific Ocean Observation Strategy for Carbon Cycle and Climate Chang
  • Place of Presentation: 気象庁
  • Year and Date: 2009-03-02
• [Presentation] Trend of DIC increase and acidification in the interior of the western North Pacific subtropical gyre (2009)
  • Author(s): M. Ishii
  • Organizer: Ocean Sciences Meeting 2010
  • Place of Presentation: ポートランド (アメリカ)
  • Year and Date: 2009-02-23
• [Presentation] 西部北太平洋亜熱帯域表層における海洋炭酸系の季節変動・年々変動・長期変動 (2008)
  • Author(s): 石井雅男
  • Organizer: 東京大学海洋研究所 共同利用シンポジウム「亜熱帯海洋学の最前線」
  • Place of Presentation: 東京大学
  • Year and Date: 2008-12-11
• [Presentation] Decadal and longer-term changes of the CO_2 in the ocean (2008)
  • Author(s): M. Ishii
  • Organizer: The second GEOSS Asia-Pacific symposium
  • Place of Presentation: 日本科学未来館
  • Year and Date: 2008-04-15
• [Presentation] Decadal and longer-term changes of the CO2 in the ocean (2008)
  • Author(s): Ishii. M.
  • Organizer: The second DEOSS Asia-Pacific symposium
  • Place of Presentation: 日本科学未来館
  • Year and Date: 2008-04-15
• [Presentation] 西部北太平洋域における海洋腐植物質の蛍光強度の時空間的変動 (2008)
  • Author(s): 大森裕子・濱健夫・石井雅男・斉藤秀
  • Organizer: 2008年度日本海洋学春季大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2008-03-29
• [Presentation] バクテリア由来腐植物質の光分解による分子量分布の変化 (2008)
  • Author(s): 霜鳥孝一・濱健夫
  • Organizer: 2008年度日本海洋学会春季大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2008-03-29
• [Presentation] 西部北太平洋域における海洋腐植物質の蛍光強度の時空間的変動 (2008)
  • Author(s): 大森裕子・濱健夫・石井雅男・斉藤秀
  • Organizer: 2008年度日本海洋学会春季大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2008-03-29
• [Presentation] Experimental studies on bacterial production of marine humic substances (2008)
  • Author(s): K. Shimotori, T. Hama
  • Organizer: Ocean Sciences Meeting
  • Place of Presentation: オーランド (アメリカ)
  • Year and Date: 2008-03-06
• [Presentation] Experimental studies on bacterial production of marine humic substances (2008)
  • Author(s): Shimotori, K., T, . Hama
  • Organizer: Ocean Sciences Meeting
  • Place of Presentation: 米国フロリダ州オーランド
  • Year and Date: 2008-03-06
• [Presentation] Molecular weight composition of marine humic substances in the subtropical Western North Pacific (2008)
  • Author(s): Y. Omori, T. Hama, M. Ishii, S. Saito
  • Organizer: Ocean Sciences Meeting
  • Place of Presentation: オーランド (アメリカ)
  • Year and Date: 2008-03-05
• [Presentation] Molecular weight composition of marine humic substances in the subtropical Western North Pacific (2008)
  • Author(s): Omori, Y. Hama, M. Ishii, S. Saito
  • Organizer: Ocean Sciences Meeting
  • Place of Presentation: 米国フロリダ州オーランド
  • Year and Date: 2008-03-05
• [Presentation] 西部北太平洋域における海洋腐植物質の分子量分布の鉛直プロファイル (2007)
  • Author(s): 大森裕子・濱健夫・石井雅男・斉藤秀
  • Organizer: 2007年度日本海洋学会秋季大会
  • Place of Presentation: 琉球大学
  • Year and Date: 2007-09-27
• [Presentation] バクテリアによる腐植物質の生産に関する実験的解析 (2007)
  • Author(s): 霜鳥孝一・濱健夫
  • Organizer: 2007年度日本海洋学会秋季大会
  • Place of Presentation: 琉球大学
  • Year and Date: 2007-09-27
• [Presentation] 西部北太平洋域における海洋腐植物質の分子量分布の鉛直プロファイル (2007)
  • Author(s): 大森裕子・濱健夫・石井雅男・斉藤秀
  • Organizer: 2007年度日本海洋秋季大会
  • Place of Presentation: 琉球大学
  • Year and Date: 2007-09-27
• [Presentation] バクテリアによる腐食物質の生産に関する実験的解析 (2007)
  • Author(s): 霜鳥孝一・濱健夫
  • Organizer: 2007年度日本海洋学会秋季大会
  • Place of Presentation: 琉球大学
  • Year and Date: 2007-09-27