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2016 Fiscal Year Annual Research Report

Development of Data Assimilation System of Old Weather Data

Research Project

Project/Area Number 15K13566
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) 2015-04-01 – 2017-03-31
Keywords古天気 / データ同化 / 大気再解析 / 古気候 / 社会変動
Outline of Annual Research Achievements

芳村・取出(2015)で示された、日記から得られる天気情報と強く相関する雲量を限られた地点でデータ同化すると、データ同化しないケースと比べて真値に近づいていること、および古天気情報を与えることで過去の日々スケールの短周期変動が拘束できるということについて、英文での論文にまとめ、"Feasibility Study of the Reconstruction of Historical Weather with Data Assimilation"というタイトルで、アメリカ気象学会のMonthly Weather Review誌に投稿した。さらに、古天気データ同化手法のさらなる改善に向けて、例えば無降水、日射量、降雪の有無などによって、どの程度モデルが拘束されるのかを調査した。その結果については、今後論文に取りまとめていく。また、本プロジェクトで開発した技術を用いることで、現在最長で130年間程度の大気再解析データを劇的に延長できる可能性があることが証明できたため、今後はこの研究をより発展させ、日本だけでなく世界各国の古文書解読を経た新たな古天気データの収集を含めた大掛かりな研究プロジェクトに展開していく。

  • Research Products

    (19 results)

All 2017 2016

All Journal Article (11 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 11 results) Presentation (7 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results) Funded Workshop (1 results)

  • [Journal Article] Development and evaluation of a system of proxy data assimilation for paleoclimate reconstruction2017

    • Author(s)
      Okazaki, A. and K. Yoshimura
    • Journal Title

      Clim. Past

      Volume: - Pages: -

    • DOI

      10.5194/cp-2016-12

    • Peer Reviewed
  • [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: - Pages: -

    • 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
  • [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: - 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 / 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. Geophs. Res. Atmos.

      Volume: - 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)
      H. A. Belgaman, K. Ichiyanagi, M. Tanoue, R. Suwarman, K. Yoshimura
    • Journal Title

      SOLA

      Volume: 12 Pages: 192-197

    • Peer Reviewed / 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, I, JGR-Atmos, 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] Assimilation Experiment of Weather Diary Data Using an LETKF System2017

    • Author(s)
      Panduka Neluwala, Kinya Toride, and Kei Yoshimura
    • Organizer
      the 3rd RIKEN International Symposium on Data Assimilation
    • Place of Presentation
      理化学研究所・計算科学研究機構(神戸市)
    • Year and Date
      2017-02-27 – 2017-03-02
    • Int'l Joint Research
  • [Presentation] Recent rapid advancement of stable water isotope measurement and modeling in precipitation process studies2017

    • Author(s)
      K. Yoshimura
    • Organizer
      The 6th Global Precipitation Measurement (GPM) Asia Workshop on Satellite Precipitation Data Utilization
    • Place of Presentation
      Bangkok, Thailand
    • Year and Date
      2017-01-18 – 2017-01-19
    • Int'l Joint Research
  • [Presentation] Future stable water isotope projection with an isotope-AGCM driven by CMIP5 SSTs2016

    • Author(s)
      K. 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] 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] 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] Development of Regional Earth System Model with RSM2016

    • Author(s)
      Kei Yoshimura
    • Organizer
      14th International Regional Spectral Model (RSM) Workshop
    • Place of Presentation
      Rio de Janeiro, Brazil
    • Year and Date
      2016-09-27 – 2016-09-29
    • Int'l Joint Research
  • [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 – 2016-09-15
    • Int'l Joint Research
  • [Funded Workshop] 14th International Regional Spectral Model (RSM) Workshop2016

    • Place of Presentation
      Rio de Janeiro
    • Year and Date
      2016-09-27 – 2016-09-29

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Published: 2018-01-16  

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