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Evaluation of nutrient impact from river to coastal biogeochemical systems as an aspect from material transport processes

Research Project

Project/Area Number 16201001
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionHokkaido University

Principal Investigator

MINAGAWA Masao  Hokkaido University, 大学院・地球環境科学研究院, Professor (10250507)

Co-Investigator(Kenkyū-buntansha) NAGAO Seiya  Hokkaido University, Faculty.Env.Earth Sci., Associate Professor (20343014)
IRINO Tomohisa  Hokkaido University, Faculty.Env.earth Sci., Assist.Prof. (70332476)
KATO Yoshisa  Tokai University, Dept.Oceanography, Professor (00152752)
NARITA Hisashi  Tokai University, Dept.Oceanography, Associate Professor (50250501)
MURAYAMA Masafumi  Kochi University (50261350)
Project Period (FY) 2004 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥50,180,000 (Direct Cost: ¥38,600,000、Indirect Cost: ¥11,580,000)
Fiscal Year 2007: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2006: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Fiscal Year 2005: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2004: ¥21,580,000 (Direct Cost: ¥16,600,000、Indirect Cost: ¥4,980,000)
KeywordsTokachi river / Abe river / Shimanto river / Niyodo river / nitrate / phosphate / silicate / coastal biological production / 河川水 / 窒素過剰 / 窒素同位体 / 四国沿岸 / 同位体分析 / 酸素同位体 / 水素同位体 / 黒潮 / 15N / 陸上植物 / 輸送 / 栄養塩比 / 駿河湾 / 遠州灘 / 窒素負荷 / イベント / 基礎生産 / 栄養塩 / 沿岸海洋 / 沈降粒子 / 海洋生物 / 海底堆積物 / 炭素循環
Research Abstract

We have investigated biogeochemical role of river runoff at several locations in Hokkaido, Central Honshu and Shikoku districts and have evaluated the contribution of these river water for the coastal biological production that is dealing with the marine carbon cycling. Based on geochemical observations including nutrient and isotopic analyses at Tokachi river, Abe river, Niyodo river, and Shimanto river, we found following results. (1) Nutrient loadings from Tokachi river were estimated as 1.3 and 0.009 mol/m^2/yr for DIN, and DIP, respectively. (2) These nutrient discharge can have dealings with 8.4 molC/m^2/yr as photosynthesis and may benefit for diatom production by their N/P and Si/N ratios. (3) Sporadic events with heavy precipitation can supply large effect mainly for nitrogen which provides potentially corresponding to 8% DIN supply of mean annual transport flux. (4) River discharge in the snow melting season would supply 30 to 40% of nutrient needed for coastal biological production, on the other hand particulate organic carbon make for less than one tenth of carbon fixation and less than a half of PON nitrogen. (5) The first class rivers in Shizuoka prefecture tend to have relatively lower nitrogen content ranging from 27 to 98 μM, but those in the second class rivers showed higher concentrations ranging from 82 to 504 mM and even wide variations. The phosphate and silicate concentrations are ranging from 0.21 to 9.2 μM and from 109 to 413 μM, respectively, reflecting difference of local environmental conditions such as water shed area, land utilization pattern and degree of civilizations.

Report

(5 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (112 results)

All 2008 2007 2006 2005 2004 Other

All Journal Article (48 results) (of which Peer Reviewed: 15 results) Presentation (58 results) Book (5 results) Remarks (1 results)

  • [Journal Article] 窒素同位体比を用いた古海洋解析2007

    • Author(s)
      堀川恵司、重光雅仁、南川雅男
    • Journal Title

      海の研究 16

      Pages: 375-399

    • NAID

      110006381910

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Manganese, cerium and iron in the Sulu, Celebes and Philippine seas2007

    • Author(s)
      Obata, H. , et. al.,
    • Journal Title

      Deep Sea Research Part II 54

      Pages: 38-49

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] The accumulation rate and benthic fluxes for selenium in the marginal seas2007

    • Author(s)
      Nakaguchi, Y. , et. al.
    • Journal Title

      Science and Technology 19

      Pages: 23-29

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Paleoceanography based on nitrogen isotope ratio in sediments.2007

    • Author(s)
      Horikawa K., et al.
    • Journal Title

      Umi no Kenkyu , marine 16 (Reviewed) (in Japanese)

      Pages: 375-399

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Manganese cerium and iron in the Sulu, Celebes and Philippine seas.2007

    • Author(s)
      Obata H., et al.
    • Journal Title

      Deep Sea Research Part II 54 (Reviewed)

      Pages: 28-49

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] The accumulation rate and benthic fluxes for selenium in the marginal seas.2007

    • Author(s)
      Nakaguchi, Y., et al.
    • Journal Title

      Science and Technology 19 (Reviewed)

      Pages: 23-39

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Environmental Geochemistry2007

    • Author(s)
      Minagawa, M.
    • Journal Title

      Geochemical textbook (Baifu-kan) vol.7 (Reviewed)

      Pages: 70-84

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Selenium speciation in pore water in marginal sea sediments2007

    • Author(s)
      Nakaguchi, Y. et al.
    • Journal Title

      Bulletin of the society of sea water science, Japan 61

      Pages: 123-131

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Manganese, cerium and iron in the Sulu, Celebes and Phillippine seas2007

    • Author(s)
      Obata, H. et al.
    • Journal Title

      Deep Sea Research Part II 54

      Pages: 38-49

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Scavenging of 230Th in the Sulu Sea2007

    • Author(s)
      Okubo, A. et al.
    • Journal Title

      Deep Sea Research Part II 54

      Pages: 50-59

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The accumulation rate and benthic fluxes for selenium in the marginal seas2007

    • Author(s)
      Nakaguchi, Y. et al.
    • Journal Title

      Science and Technology 19

      Pages: 23-29

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Precipitation of authigenic uranium in suboxic continental margin sediments from the Okinawa Trough.2006

    • Author(s)
      Yamada, M. , et. al.
    • Journal Title

      Estuarine, Coastal and Shelf Science 66

      Pages: 570-579

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Distribution and sources of organic matter in surficial sediments on the shelf and slope off Tokachi, western North Pacific, inferred from C and N Stable isotopes and C/N ratios,2006

    • Author(s)
      Usui, T., et. al.
    • Journal Title

      Marine Chemistry 98

      Pages: 241-259

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] N2 fixation variability in the oligotrophic Sulu Sea, western equatorial Pacific region over the past 83 kyr2006

    • Author(s)
      Horikawa, K., et. al.
    • Journal Title

      Journal of Oceanography 62

      Pages: 427-439

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr2006

    • Author(s)
      Horikawa, K., et. al.
    • Journal Title

      Geophysical Research Letter 33

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Biogeochemistry, in Geochemical lesson series2006

    • Author(s)
      Minagawa, M.
    • Journal Title

      Geochemical textbook (Baifu-kan) Vol.5 (Reviewed)

      Pages: 216-216

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Precipitation of authigenic uranium in suboxic continental margin sediments from the Okinawa Trough.2006

    • Author(s)
      Yamada, M., et al.
    • Journal Title

      Estuarine, Coastal and Shelf Science 66 (Reviewed)

      Pages: 570-579

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Distribution and sources of organic matter in surficial sediments on the shelf and slope off Tokachi, western North Pacific, inferred from C and N Stable isotopes and C/N ratios2006

    • Author(s)
      Usui, T., et al.
    • Journal Title

      Marine Chemistry 98 (Reviewed)

      Pages: 241-259

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] N2 fixation variability in the oligotrophic Sulu Sea, western equatorial Pacific region over the past 83 kyr2006

    • Author(s)
      Horikawa K., et al.
    • Journal Title

      Journal of Oceanography 62 (Reviewed)

      Pages: 427-439

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr.2006

    • Author(s)
      Horikawa K., et al.
    • Journal Title

      Geophysical Research Letter 33 (Reviewed)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Spatial and temporal sea-surface temperatures in the eastern equatorial Pacific over the past 150 kyr2006

    • Author(s)
      Horikawa K., Minagawa M., Murayama M., Kato Y., Asahi H.
    • Journal Title

      Geophysical Research Letter 33

    • NAID

      120000958607

    • Related Report
      2006 Annual Research Report
  • [Journal Article] N2 fixation variability in the oligotrophic Sulu Sea, western equatorial Pacific region over the past 83 kyr2006

    • Author(s)
      Horikawa K., Minagawa M, Kato Y., Murayama M., Nagao S.
    • Journal Title

      Jour. Oceanography 62

      Pages: 427-439

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Variation in stable isotope ratios of carbon and nitrogen in Hokkaido sika deer Cervus nippon, 1990-2000 : possible dietary causes and implications for management2006

    • Author(s)
      Halley D., Kaji, K., Minagawa M.
    • Journal Title

      Wildlife Biology 12

      Pages: 211-217

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Distribution and sources of organic matter in surficial sediments on the shelf and slope off Tokachi, western North Pacific, inferred from C and N Stable isotopes and C/N ratios2006

    • Author(s)
      Usui T., et al.
    • Journal Title

      Marine Chemistry 98

      Pages: 241-259

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 日本人はいつから海洋資源を利用していたか2006

    • Author(s)
      南川雅男
    • Journal Title

      海洋化学研究 19

      Pages: 94-100

    • Related Report
      2006 Annual Research Report
  • [Journal Article] N2 fixation variability in the oligotrophic Sulu Sea, western equatorial Pacific region over the past 83 kyr2006

    • Author(s)
      Horikawa K., Minagawa M., Kato Y., Murayama M., Miura Y., Nagao S.
    • Journal Title

      Journal of Oceanography (In press)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Long term Aleutian Low dynamics and obliquity-controlled oceanic primary production in the mid-latitude western North Pacific (Core MD01-2421) during the last 145,000 years2006

    • Author(s)
      Ueshima, T., Yamamoto, M., Irino, T., Oba, T., Minagawa, M., Narita, H., Murayama, M.
    • Journal Title

      Global Planetary Change (In press)

    • NAID

      120000960122

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Distribution and sources of organic matter in surficial sediments on the shelf and slope off Tokachi, western North Pacific, inferred from C and N Stable isotopes and C/N ratios,2006

    • Author(s)
      Usui T., Nagao S., Yamamoto M., Suzuki K., Kubo I., Montani S., Noda A., Minagawa M.
    • Journal Title

      Marine Chemistry 98

      Pages: 241-259

    • NAID

      120000955221

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Long term Aleutian Low dynamics and obliquity-controlled oceanic primary production in the mid-latitude western North Pacific (Core MD01-2421) during the last 145,000 years2005

    • Author(s)
      Ueshima, T., et. al.
    • Journal Title

      Global Planetary Change 53

      Pages: 21-28

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Combined use of δ^<14>C and δ^<13>C values as a tracer of transportation and deposition processes of particulate organic matter with terrestrial origin in coastal marine environment2005

    • Author(s)
      Nagao, S. , et. al.
    • Journal Title

      Chemical Geology 218

      Pages: 63-72

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] A 100,000 years climate history of the Eastern Arabian Sea: Monsoon precipitation and productivity trends2005

    • Author(s)
      Banakar, V. K., et. al.
    • Journal Title

      Marine Geology 219

      Pages: 99-108

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Os isotopic record of Japan Sea sediments: Impact of glacial interglacial climate change on weathering fluxes2005

    • Author(s)
      Dalai, T. , et. al.
    • Journal Title

      Chemical Geology 220

      Pages: 303-314

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] 東部太平洋堆積物中の微量元素の存在状態と酸化還元環境との関係2005

    • Author(s)
      北畑謙一, ら
    • Journal Title

      月刊海洋 号外 No.39

      Pages: 96-103

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] 海洋における懸濁粒子の化学組成と間隙水を経由する物質の拡散フラックス2005

    • Author(s)
      南 秀樹, ら
    • Journal Title

      月刊海洋 号外 No.39

      Pages: 104-113

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] 海洋におけるBa-si/Nダイヤグラムの開発2005

    • Author(s)
      加藤義久, ら
    • Journal Title

      月刊海洋 号外 No.39

      Pages: 126-136

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Long term Aleutian Low dynamics and obliquity-controlled oceanic primary production in the mid-latitude western North Pacific (Core MD01-2421) during the last 145,000 years.2005

    • Author(s)
      Ueshima, T., et al.
    • Journal Title

      Global Planetary Change 53 (Reviewed)

      Pages: 21-28

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Geochemistry of marine sediment2005

    • Author(s)
      Kato, Y.
    • Journal Title

      Geochemical textbook (Baifu-kan) vol.6 (Reviewed)

      Pages: 288-311

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Combined use of δ^<14>C and δ^<13>C values as a tracer of transportation and deposition processes of particulate organic matter with terrestrial origin in coastal marine environment2005

    • Author(s)
      Nagao, S., et al.
    • Journal Title

      Chemical Geology 218 (Reviewed)

      Pages: 63-72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] A 100,000 years climate history of the Eastern Arabian Sea: Monsoon precipitation and productivity trends2005

    • Author(s)
      Banakar, V. K., et al.
    • Journal Title

      Marine Geology 219 (Reviewed) (in Japanese)

      Pages: 99-108

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Os isotopic record of Japan Sea sediments: Impact of glacial interglacial climate change on weathering fluxes2005

    • Author(s)
      Dalai, T., et al.
    • Journal Title

      Chemical Geology 220 (Reviewed)

      Pages: 303-314

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Relationship between existence states of trace elements and the oxidation-reduction environment in sediments from the east Pacific.2005

    • Author(s)
      Kitabatake, K.
    • Journal Title

      Monthly Ocean sup. 39 (non-reviewed) (in Japanese)

      Pages: 96-103

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Chemical composition of marine suspended matters and material diffusion fluxes through interstitial water.2005

    • Author(s)
      Minami, H., et al.
    • Journal Title

      Monthly Ocean sup. 39 (non-reviewed) (in Japanese)

      Pages: 104-113

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Development of Ba-Si/N diagram in the ocean2005

    • Author(s)
      Kato, Y., et al.
    • Journal Title

      Monthly Ocean sup. 39 (non-reviewed) (in Japanese)

      Pages: 126-136

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Os isotopic record of Japan Sea sediments : Impact of glacial climate change on weathering fluxes2005

    • Author(s)
      Dalai T.K., Suzuki K., Minagawa M., Nozaki Y.
    • Journal Title

      Chemical Geology 220

      Pages: 303-314

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Monsoon related changes in sea surface productivity and water column denitrification in the Eastern Arabian Sea during the last glacial cycle2005

    • Author(s)
      Bankar, V.K., Oba, T., Chodankar, A.R., Kuramoto, T., Yamamoto, M., Minagawa, M.
    • Journal Title

      Marine Geology 219

      Pages: 99-108

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Use of δ^<14>C and δ^<13>C values as a tracer of transportation and deposition processes of particulate organic matter with terrestrial origin in coastal marine environment2005

    • Author(s)
      Nagao S., Usui T., Yamamoto M., Minagawa M., Iwasaki T., Noda A.
    • Journal Title

      Chemical Geology 218

      Pages: 63-72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Use of Δ^<14>C and δ^<13>C values as a tracer of transportation and deposition processes of particulate organic matter with terrestrial origin in coastal marine environment

    • Author(s)
      Nagao S., Usui T., Yamamoto, M., Minagawa M, Iwasaki T., Noda A.
    • Journal Title

      Chemical Geology (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Long term Aleutian Low dynamics and obliquity-controlled oceanic primary production in the mid-latitude western North Pacific (Core MD01-2421) during the last 145,000 years

    • Author(s)
      Ueshima, T., Yamamoto, M., Irino, T., Oba, T., Minagawa, M., Narita, H., Murayama, M.
    • Journal Title

      Chemical Geology (印刷中)

    • NAID

      120000960122

    • Related Report
      2004 Annual Research Report
  • [Presentation] 南西太平洋ニュージーランド沖における過去34万年間の表層水塊変動2008

    • Author(s)
      佐川拓也, ら
    • Organizer
      2007年度古海洋シンポジウム
    • Place of Presentation
      東京都,東京大学海洋研究所
    • Year and Date
      2008-01-07
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Past 340 thousand years change of surface seawater off New Zealand, south western Pacific.2008

    • Author(s)
      Sagawa T., et al.
    • Organizer
      Annual meeting on paleoceanography 2007
    • Place of Presentation
      Ocean Res. Inst., Univ. Tokyo
    • Year and Date
      2008-01-07
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Riverine suspension transport during flooding event and its significance on marine sedimentation - Example from subarctic small rivers in Hokkaido2007

    • Author(s)
      Irino, T. , et. al.
    • Organizer
      International Symposium on Quaternary Environmental Changes and Humans in Asia and the Western Pacific
    • Place of Presentation
      つくば市,独立行政法人産業技術総合研究所
    • Year and Date
      2007-11-20
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Riverine suspension transport during flooding event and its significance on marine sedimentation - Example from subarctic small rivers in Hokkaido2007

    • Author(s)
      Irino, T., et al.
    • Organizer
      International Symposium on Quaternary Environmental Changes and Humans in Asia and the Western Pacific
    • Place of Presentation
      Nation. Inst. Adv. Indust. Sci. Tech., Tsukuba, Ibaragi
    • Year and Date
      2007-11-20
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Riverine suspension transport during flooding event and its significance on marine sedimentation-Example from subarctic small rivers in Hokkaido2007

    • Author(s)
      Irino, T., Tada, A., Kuwayama, Y., Usui, T., Nagao, S., Minagawa, M., and Ikehara, K.
    • Organizer
      International Symposium on Quaternary Environ mental Changes and Humans in Asia and the Western Pacific
    • Place of Presentation
      つくば市,独立行政法人産業技術総合研究所
    • Year and Date
      2007-11-20
    • Related Report
      2007 Annual Research Report
  • [Presentation] 西部南太平洋における海底堆積物中の微量元素の初期続成過程に関する研究2007

    • Author(s)
      竹中 健・中口 譲・佐久間裕一・南 秀樹・加藤義久
    • Organizer
      2007年度日本地球化学会年会
    • Place of Presentation
      岡山市,岡山大学津島キャンパス
    • Year and Date
      2007-09-19
    • Related Report
      2007 Annual Research Report
  • [Presentation] New multi-proxy records of TOC, Opal, CaCO3 and Uvigerina spp. δ^<13>C in the eastern equatrial Pacific over the past 750 kyr2007

    • Author(s)
      Murayama, M., et. al.
    • Organizer
      9th International Conference on Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-05
    • Related Report
      2007 Annual Research Report
  • [Presentation] The changes of calcite and opal in the sediment cores from the HNLC areas: Esstern equatorial Pacific, Antarctic ocean and southern Pacific subpolar front area2007

    • Author(s)
      Konishi, Y. , et. al.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Chronostratigraphy and paleoceanographic change of quaternary sediments from southwestern part of Pacific-Antarctic ridge, the Ross sea, Antarctica2007

    • Author(s)
      Murayama, M. , et. al.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] New multi-proxy records of TOC, opal, CaCO3 and Uvigerina spp., d13C in the eastern equatorial Pacific over the past 750 kyr2007

    • Author(s)
      Kato, Y. , et. al.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Paleo- temperature and salinity history over the last 340 kyr in mid-latitude (43S of the southwestern Pacific, eastern Chatham rise2007

    • Author(s)
      Sagawa, T. , et. al.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Water-column denitrification in the Bering Sea: sedimentary d^<15>N records in the Northwest Pacific2007

    • Author(s)
      Horikawa, K. , et. al.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] The changes of calcite and opal in the sediment cores from the HNLC areas: Eastern equatorial Pacific, Antarctic ocean and southern Pacific subpolar front area2007

    • Author(s)
      Konishi, Y., et al.
    • Organizer
      9^<th> International Conference of Paleoceanography
    • Place of Presentation
      Shanghai, China
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Chronostratigraphy and paleoceanographyc change of quaternary sediments from southwestern part of Pacific-Antarctic ridge, the Ross sea, Antarctica.2007

    • Author(s)
      Murayama, M., et al.
    • Organizer
      9^<th> International Conference of Paleoceanography
    • Place of Presentation
      Shanghai, China
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] New multi-proxy records of TOC, opal, CaCO3 and Uvigerina spp., d13C in the eastern equatorial Pacific over the past 750 kyr2007

    • Author(s)
      Kato, Y., et al.
    • Organizer
      9^<th> International Conference of Paleoceanography
    • Place of Presentation
      Shanghai, China
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Paleo-temperature and salinity history over the last 340 kyr in mid-latitude (43S of the southwestern Pacific, eastern Chatham rise2007

    • Author(s)
      Sagawa T., et al.
    • Organizer
      9^<th> International Conference of Paleoceanography
    • Place of Presentation
      Shanghai, China
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Water-column denitrification in the Bering Sea: sedimentary d^<15>N records in the Northwest Pacific2007

    • Author(s)
      Horikawa, K., et al.
    • Organizer
      9^<th> International Conference of Paleoceanography
    • Place of Presentation
      Shanghai, China
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Paleo-temperature and salinity histry over the last 340 Kyr in mid-latitude (43S of the southwetern Pacific, eastern Chatham2007

    • Author(s)
      Sagawa, T., Nuita, M., Horikawa, K., Murayama, M., Kato, Y., Minagawa, M.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] Water-column denitrification in the Bering Sea: sedimentary d^15N records in the Northwest Pacific2007

    • Author(s)
      Horikawa, K.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] Chronostratigraphy and paleoceanographic change of quaternary sediments form southwestern part of Pacific-antarctic ridge, the Ross sea, Antarctica2007

    • Author(s)
      Murayama, M., Yagi, Y., Moshima, T., Horikawa, K., Sagawa, T., Kodama, K., Kato, Y., Minagawa, M.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] The changes of calcite and opal in the sediment cores from the HNLC areas: Eastern equatorial Pacific, Anterctice ocean and southern Pacific subpolar front area2007

    • Author(s)
      Konishi, Y., Kato, Y., Nakamura, T., Horikawa, K., Murayama, M., Minagawa, M.
    • Organizer
      9th International Conference of Paleoceanography
    • Place of Presentation
      上海市国際会議中心
    • Year and Date
      2007-09-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] 十勝川観測に基づく河川流出懸濁物の海洋への輸送量2007

    • Author(s)
      入野智久, ら
    • Organizer
      日本堆積学会2007年例会
    • Place of Presentation
      つくば市 つくばカピオ
    • Year and Date
      2007-03-29
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Transport flux of suspended matter from riverine discharge assessed from Tokachi river observation2007

    • Author(s)
      Irino, T.
    • Organizer
      Annual meeting on Japanese Society of Sedimentology
    • Place of Presentation
      Tsukuba Capio, Ibaragi
    • Year and Date
      2007-03-29
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 亜酸化的海底環境堆積物における主要化学元素の挙動と色相について2007

    • Author(s)
      南 秀樹, ら
    • Organizer
      第2回地球化学による海洋堆積学研究会「沿岸と外洋における物質循環とその変遷」
    • Place of Presentation
      札幌市 北海道大学
    • Year and Date
      2007-03-05
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Chemical behavior of major components and coloring of marine sediments from suboxic bottom layers.2007

    • Author(s)
      Minami, H.
    • Organizer
      2^<nd> Workshop on geochemical research for marine sediments: Coastal and pelagic material cycling
    • Place of Presentation
      Hokkaido Univ., Sapporo
    • Year and Date
      2007-03-05
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Productivity evolution forced by precessional cycles in the North Equatorial Countercurrent, eastern equatorial Pacific over the last 150kyr2006

    • Author(s)
      Horikawa, K. , et. al.
    • Organizer
      AGU Fall Meeting, San Francisco, 2006
    • Place of Presentation
      サンフランシスコ市モスコンコンベンションセンター
    • Year and Date
      2006-12-10
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Productivity evolution forced by precessional cycles in the North Equatorial Countercurrent, eastern equatorial Pacific over the last 150kyr2006

    • Author(s)
      Horikawa, K., et al.
    • Organizer
      AGU Fall Meeting
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2006-12-10
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Inorganic suspension load from the Tokachi River, Hokkaido, Japan2006

    • Author(s)
      Irino, T. , et. al.
    • Organizer
      17th International Sedimentological Congress
    • Place of Presentation
      福岡市 福岡国際会議場
    • Year and Date
      2006-08-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Inorganic suspension load from the Tokachi River, Hokkaido Japan2006

    • Author(s)
      Irino, T., et al.
    • Organizer
      17th International Sedimentological Congress
    • Place of Presentation
      Fukuoka
    • Year and Date
      2006-08-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 潮大蛇行に伴い形成された遠州灘沖冷水塊周辺のBaおよひRa同位体の分布2006

    • Author(s)
      副島 広道, ら
    • Organizer
      2006年度日本海洋学会春季大会シンポジウム
    • Place of Presentation
      横浜市 横浜市立大学
    • Year and Date
      2006-03-26
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 太平洋深海堆積物間隙水中のバリウムの分布2006

    • Author(s)
      中村 智己, ら
    • Organizer
      2006年度日本海洋学会春季大会シンポジウム
    • Place of Presentation
      横浜市 横浜市立大学
    • Year and Date
      2006-03-26
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 伊勢湾底泥A10コアにおける堆積速度について2006

    • Author(s)
      加藤義久, ら
    • Organizer
      2006年度日本海洋学会春季大会シンポジウム
    • Place of Presentation
      横浜市 横浜市立大学
    • Year and Date
      2006-03-26
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Ba and Ra isotope distributions in the cold water mass off Enshunada formed with tidal meandering.2006

    • Author(s)
      Soejima, H., et al.
    • Organizer
      Spring meeting of Oceanography Society of Japan
    • Place of Presentation
      Yokohama City Univ., Yokohama
    • Year and Date
      2006-03-26
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Ba distribution in interstitial water of deep sea sediment from Pacific ocean.2006

    • Author(s)
      Nakamura T., et al.
    • Organizer
      Spring meeting of Oceanography Society of Japan
    • Place of Presentation
      Yokohama City Univ., Yokohama
    • Year and Date
      2006-03-26
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Sedimentation rate of A-10 sediment core from Ise bay.2006

    • Author(s)
      Kato, Y., et al.
    • Organizer
      Spring meeting of Oceanography Society of Japan
    • Place of Presentation
      Yokohama City Univ., Yokohama
    • Year and Date
      2006-03-26
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 東部太平洋の古海洋変動記録と窒素循環システムの復元(KH03-1航海で採取された海底コア HY04,HY06,HY08の分析結果の予報)2006

    • Author(s)
      堀川恵司, ら
    • Organizer
      東京大学海洋研究所共同利用研究集会 太平洋および南極海の微量元素・同位体と生物地球化学サイクル(GEOTRACES計画)
    • Place of Presentation
      東京都 東京大学海洋研究所
    • Year and Date
      2006-01-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 南太平洋- 南極海縦断観測におけるBa-Si/Nダイヤグラム2006

    • Author(s)
      加藤義久, ら
    • Organizer
      東京大学海洋研究所共同利用研究集会 太平洋および南極海の微量元素・同位体と生物地球化学サイクル(GEOTRACES計画)
    • Place of Presentation
      東京都 東京大学海洋研究所
    • Year and Date
      2006-01-26
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Ba-Si/N diagram from longitudinal observation at the Southern ocean and Antarctic sea.2006

    • Author(s)
      Kato, Y., et al.
    • Organizer
      Research meeting on trace elements and its isotopes and biogeochemical cycling (GEOTRACES program)
    • Place of Presentation
      ORI, Univ. Tokyo, Tokyo
    • Year and Date
      2006-01-26
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Paleoceanographic change and reconstruction of nitrogen cycling systems: Preliminary report of sediment cores HY04, HY06 and HY08 obtained from KH03-1 cruise.2006

    • Author(s)
      Horikawa, K., et al.
    • Organizer
      Research meeting on trace elements and its isotopes and biogeochemical cycling (GEOTRACES program)
    • Place of Presentation
      ORI, Univ. Tokyo, Tokyo
    • Year and Date
      2006-01-26
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 東赤道太平洋の過去150kyrの水温変動とcold-tongue発達時期の推定2006

    • Author(s)
      堀川恵司, ら
    • Organizer
      2006年度古海洋学シンポジウム
    • Place of Presentation
      東京都 東京大学海洋研究所
    • Year and Date
      2006-01-12
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Estimation of paleo-temperature and cold water tongue for East tropical pacific ocean.2006

    • Author(s)
      Horikawa, K., et al.
    • Organizer
      Research meeting on paleoceanography
    • Place of Presentation
      ORI, Univ. Tokyo
    • Year and Date
      2006-01-12
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Alkenone- SST and Nitrogen Isotope Records in the Three Piston Cores in the Eastern Equatorial Pacific During the Past 150 ky2005

    • Author(s)
      Horikawa, K. , et. al.
    • Organizer
      AGU fall meeting, San Francisco 2005
    • Place of Presentation
      サンフランシスコ市モスコンコンベンションセンター
    • Year and Date
      2005-12-06
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Core correlations of three sites straddling the equator in the eastern Pacific2005

    • Author(s)
      Murayama, M. , et. al.
    • Organizer
      The 10th International Conference on Accelerator Mass Spectrometry
    • Place of Presentation
      カリフォルニア大学バークレー校
    • Year and Date
      2005-12-06
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Alkenone-SST and Nitrogen isotope records in the three piston cores in the Eastern Equatorial Pacific during the past 150 ky2005

    • Author(s)
      Horikawa, K., et al.
    • Organizer
      Annual Fall Meeting of American Geophysic Soc.
    • Place of Presentation
      San Francisco
    • Year and Date
      2005-12-06
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Core correlations of three sites straddling the equator in the eastern Pacific2005

    • Author(s)
      Murayama, M., et al.
    • Organizer
      The 10th International Conference on Accelerator Mass Spectrometry
    • Place of Presentation
      Univ. California, Barkley USA
    • Year and Date
      2005-12-06
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 古海洋学研究と微量元素・同位体2005

    • Author(s)
      加藤義久, ら
    • Organizer
      2005年度日本海洋学会秋季大会シンポジウム
    • Place of Presentation
      仙台市 戦災復興記念会館
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 北太平洋横断観測(WOCE-P02T)で見いだされたバリウムと珪素・窒素比の関係2005

    • Author(s)
      副島広道, ら
    • Organizer
      2005年度日本海洋学会秋季大会シンポジウム
    • Place of Presentation
      仙台市 戦災復興記念会館
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 南極海におけるバリウムの分布- 白鳳丸KH-04-5次航海における研究結果2005

    • Author(s)
      中村智己, ら
    • Organizer
      2005年度日本海洋学会秋季大会シンポジウム
    • Place of Presentation
      仙台市 戦災復興記念会館
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Trace element and isotopes for paleoceanography.2005

    • Author(s)
      Kato, Y., et al.
    • Organizer
      Fall meeting of Japan Soc. of Oceanography
    • Place of Presentation
      Memorial Hall of Recovering from War Damage, Sendai
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Relationship between Ba and silicate nitrogen rations observed in the WOCE-P02T cruise in North Pacific Ocean.2005

    • Author(s)
      Soejima, H., et al.
    • Organizer
      Fall meeting of Japan Soc. of Oceanography
    • Place of Presentation
      Memorial Hall of Recovering from War Damage, Sendai
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Distribution of Barium in the Antarctic sea: results from Hakuho-maru KH04-5 cruise.2005

    • Author(s)
      Nakamura T., et al.
    • Organizer
      Fall meeting of Japan Soc. of Oceanography
    • Place of Presentation
      Memorial Hall of Recovering from War Damage, Sendai
    • Year and Date
      2005-09-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 十勝川からの無機懸濁態粒子流出量2005

    • Author(s)
      入野智久, ら
    • Organizer
      地球惑星科学関連学会2005年合同大会
    • Place of Presentation
      千葉市 幕張メッセ国際会議場
    • Year and Date
      2005-05-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] A rule of N_2 fixation region for ocean nitrogen cycle in the past 120kyr2005

    • Author(s)
      Horikawa, K. , et. al.
    • Organizer
      地球惑星科学関連学会2005年合同大会
    • Place of Presentation
      千葉市 幕張メッセ国際会議場
    • Year and Date
      2005-05-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Discharge of suspended inorganic particles from River Tokachi2005

    • Author(s)
      Irino, T., et al.
    • Organizer
      Annual meeting of Japan Geoscience Union
    • Place of Presentation
      Makuhari Messe, Chiba
    • Year and Date
      2005-05-22
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] A rule of N_2 fixation region for ocean nitrogen cycle in the past 120kyr2005

    • Author(s)
      Horikawa, K., et al.
    • Organizer
      Annual meeting of Japan Geoscience Union
    • Place of Presentation
      Makuhari Messe, Chiba
    • Year and Date
      2005-05-22
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Glacial-interglacial change in paleoproductivity associated with N_2 fixation in the Sulu Sea, western equatorial Pacific2004

    • Author(s)
      Horikawa, K. , et. al.
    • Organizer
      8th International Conference on Paleoceanography
    • Place of Presentation
      the conference center of the local landmark Casino, Biarritz, France
    • Year and Date
      2004-09-05
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 太平洋赤道湧昇域から採取したピストンコアについて(KH-03-1)2004

    • Author(s)
      加藤義久, ら
    • Organizer
      東京大学海洋研究所シンポジウム, 海洋の微量元素・同位体研究の最新動向と将来展望
    • Place of Presentation
      東京都 東京大学海洋研究所
    • Year and Date
      2004-09-03
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] A piston core from upwelling region in the Equatorial Pacific (KH 03-1)2004

    • Author(s)
      Kato, Y.
    • Organizer
      Research meeting on trace elements and its isotopes, recent trend and future perspective
    • Place of Presentation
      ORI, Univ. Tokyo
    • Year and Date
      2004-09-03
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 地球化学講座第7巻「環境の地球化学」2007

    • Author(s)
      南川雅男 (分担)
    • Publisher
      培風館
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 環境の地球化学2007

    • Author(s)
      南川雅男 (分担)
    • Publisher
      培風館
    • Related Report
      2007 Annual Research Report
  • [Book] 地球化学講座第5巻「生物地球化学」2006

    • Author(s)
      南川雅男、吉岡崇仁
    • Total Pages
      216
    • Publisher
      培風館
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 生物地球化学2006

    • Author(s)
      南川正男, 吉岡崇仁他
    • Total Pages
      216
    • Publisher
      培風館
    • Related Report
      2005 Annual Research Report
  • [Book] 地球化学講座第6巻「大気と水圏の地球化学」2005

    • Author(s)
      加藤義久
    • Total Pages
      318
    • Publisher
      培風館
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Remarks] 「研究成果報告書概要(和文)」より

    • URL

      http://geos.ees.hokudai.ac.jp/minagawa/

    • Related Report
      2007 Final Research Report Summary

URL: 

Published: 2004-04-01   Modified: 2016-04-21  

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