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2016 Fiscal Year Research-status Report

水同位体比データ同化システムを用いた大気・陸面水循環過程の詳細解明(国際共同研究強化)

Research Project

Project/Area Number 15KK0199
Research InstitutionThe University of Tokyo

Principal Investigator

芳村 圭  東京大学, 生産技術研究所, 准教授 (50376638)

Project Period (FY) 2016 – 2018
Keywords水安定同位体 / 蒸発散 / 植物活動 / 水蒸気同位体比 / 成分分離 / 地球水循環
Outline of Annual Research Achievements

平成28年度には、8月中にサンディエゴ州立大を訪れ、Lai教授との共同研究を進めるとともに、次年度に行う長期滞在の準備を行った。その上で、日本にて水蒸気同位体比を用いた蒸発・蒸散分離に関する研究を進めた。具体的には、自らが水田で行った観測データに加えて、これまで行われてきた66の論文から得られた情報を元に、6つの植生タイプごとに葉面積指数と蒸散寄与率との関係性を求め、その関係式を全球に適用した。その結果、20%から90%近くまでと、近年の研究で非常にばらつきがある全球蒸散寄与率(全球陸域からもたらされる蒸発散量のうちの植物活動に由来する蒸散量割合)の推定値について、57%(±7%)という新たな値を提示した。この研究結果は、Geophysical Research Letters誌にて発表した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

計画通り共同研究先の研究機関を訪れ、来年度に行う長期滞在の準備ができたため。

Strategy for Future Research Activity

2017年8月ごろに渡米し、半年程度の滞在を計画している。これまで通りの共同研究の進め方で、水同位体情報を用いたデータ同化研究を進める。研究を遂行する上での課題は、今の所特にない。

  • Research Products

    (14 results)

All 2017 2016

All Journal Article (10 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 10 results,  Open Access: 3 results) Presentation (4 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Journal Article] Revisiting the contribution of transpiration to global terrestrial evapotranspiration2017

    • Author(s)
      Wei, Z., K. Yoshimura, L. Wang, D. Miralles, S. Jasechko, X. Lee
    • Journal Title

      Geophys. Res. Let.

      Volume: 44 Pages: 2792-2801

    • DOI

      10.1002/2016GL072235

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An estimation of water origins in the vicinity of a tropical cyclone's center and associated dynamic processes2017

    • Author(s)
      Takakura, T., R. Kawamura, T. Kawano, K. Ichiyanagi, M. Tanoue, K. Yoshimura
    • Journal Title

      Clim. Dyn.

      Volume: - Pages: -

    • DOI

      10.1007/s00382-017-3626-9

    • Peer Reviewed / Open Access
  • [Journal Article] Sensitivity evaluation of spectral nudging schemes in historical dynamical downscaling for South Asia2017

    • Author(s)
      Ramzan, M., S. Ham, M. Amjad, E.-C. Chang and K. Yoshimura
    • Journal Title

      Advances in Meteorology

      Volume: - Pages: -

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluating the skills of isotope-enabled general circulation models against in situ atmospheric water vapor isotope observations2017

    • Author(s)
      Steen-Larsen, H.C., C. Risi, M. Werner, K. Yoshimura, V. Masson-Delmotte
    • Journal Title

      J. Geophys. Res. Atmos.

      Volume: 122 Pages: -

    • DOI

      10.1002/2016JD025443

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] El Nino Southern Oscillation Signature in Atmospheric Water Isotopes over Maritime Continent during Wet Season2017

    • Author(s)
      Suwarman, R., K. Ichiyanagi, M. Tanoue, K. Yoshimura, S. Mori, M. Yamanaka, F. Syamsudin
    • Journal Title

      J. Meteor. Soc. Japan

      Volume: - Pages: -

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Controlling factors of rainwater and water vapor isotopes at Bangalore, India: Constraints from observations in 2013 Indian monsoon2016

    • Author(s)
      Rahul P., P. Ghosha, S.K. Bhattacharya and K. Yoshimura
    • Journal Title

      J. Geophys. Res. Atmos.

      Volume: 121 Pages: -

    • DOI

      10.1002/2016JD025352

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Long-distance transport of radioactive plume by nocturnal local winds2016

    • Author(s)
      Yoshikane, T., K. Yoshimura, E.-C. Chang, A. Saya, and T. Oki
    • Journal Title

      Scientific Reports

      Volume: 6 Pages: -

    • DOI

      10.1038/srep36584

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Intraseasonal Variability of δ18O of Precipitation over the Indonesian Maritime Continent Related to the Madden-Julian Oscillation2016

    • Author(s)
      Belgaman, H. A., K. Ichiyanagi, M. Tanoue, R. Suwarman, K. Yoshimura, S. Mori, N. Kurita, M. D. Yamanaka, F. Syamsudin
    • Journal Title

      SOLA

      Volume: 12 Pages: 192-197

    • DOI

      10.2151/sola.2016-039

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The response of winter Pacific North American pattern to the largest volcanic eruptions2016

    • Author(s)
      Liu, Z., K. Yoshimura, N. Buenning, Z. Jian
    • Journal Title

      Clim. Dyn.

      Volume: - Pages: -

    • DOI

      10.1007/s00382-016-3287-0

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Interannual controls on oxygen isotope variability in Asian Monsoon precipitation and implications for paleoclimate reconstructions2016

    • Author(s)
      Yang, H., K.R. Johnson, M.L. Griffiths, K. Yoshimura 121, 8410-8428, doi:, 2016.
    • Journal Title

      J. Geophys. Res. Atmos.

      Volume: 121 Pages: 8410-8428

    • DOI

      10.1002/2015JD024683

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Transpiration accounts for two thirds of global terrestrial evaporation2016

    • Author(s)
      Zhongwang Wei, Kei Yoshimura, Xuhui Lee, Lixin Wang, Diego G. Miralles, Scott Jasechko
    • Organizer
      AGU Fall Meeting 2016
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2016-12-12 – 2016-12-16
    • Int'l Joint Research
  • [Presentation] Future stable water isotope projection with an isotope-AGCM driven by CMIP5 SSTs2016

    • Author(s)
      Kei Yoshimura
    • Organizer
      AGU Fall Meeting 2016
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2016-12-12 – 2016-12-16
    • Int'l Joint Research
  • [Presentation] Data assimilation with stable water isotope information2016

    • Author(s)
      Kei Yoshimura
    • Organizer
      EGU Leonardo conference 2016
    • Place of Presentation
      Ourense, Spain
    • Year and Date
      2016-10-25 – 2016-10-27
    • Int'l Joint Research / Invited
  • [Presentation] Isotope data assimilation: Applications for modern hydrology and paleoclimatology2016

    • Author(s)
      Kei Yoshimura
    • Organizer
      Technical Meeting on "Reappraising the Use of Data on Isotopes in Precipitation
    • Place of Presentation
      Vienna, Austria
    • Year and Date
      2016-09-14 – 2016-09-17
    • Int'l Joint Research / Invited

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Published: 2018-01-16  

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