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A hyper-resolution land data assimilation system

Research Project

Project/Area Number 17K18352
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Hydraulic engineering
Meteorology/Physical oceanography/Hydrology
Research InstitutionThe University of Tokyo (2019)
Japan, Meteorological Research Institute (2017-2018)

Principal Investigator

SAWADA Yohei  東京大学, 大学院工学系研究科(工学部), 准教授 (30784475)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords陸域モデル / データ同化 / マイクロ波衛星観測 / 陸面モデリング / マイクロ波リモートセンシング / 陸面データ同化
Outline of Final Research Achievements

It is important for hydrometeorologic disaster prediction to accurately simulate terrestrial water, ecosystem, and energy cycles. To improve the skill of the simulation, land data assimilation, in which in-situ and satellite observations are integrated into land surface models, should be investigated. In this study, we developed "hyper-resolution land data assimilation system" whose spatial resolution is 100 times as fine as the previous studies. We investigated how the increase of the resolution and associated model physics affected the efficiency of data assimilation. In addition, we proposed a new method to efficiently optimize unknown parameters of hyper-resolution land models by applying machine learning technology.

Academic Significance and Societal Importance of the Research Achievements

学術的意義:陸域の水・生態系・エネルギーのシミュレーション精度向上のため、陸域モデルの高解像度化が近年の学問的トレンドである。しかし、陸域モデルに観測データを統合するデータ同化技術に関しての既往研究は、低解像度な陸域モデルを対象とするものが多かった。本研究は来るべき超高解像度陸域モデル時代にあるべきデータ同化研究を先取りし、次世代の陸面データ同化システムのデザインを世界に先駆けて行ったものである。
社会的意義:開発した「超高解像度陸面データ同化システム」は長期的には、陸域の洪水・干ばつ等の災害の様相を精緻に監視・予測するための基盤技術になることが期待され、安心・安全な社会の構築に貢献できる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (20 results)

All 2019 2018 2017

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (13 results) (of which Int'l Joint Research: 10 results,  Invited: 1 results)

  • [Journal Article] Monitoring and predicting agricultural droughts for a water-limited sub-continental region by integrating a land surface model and microwave remote sensing2019

    • Author(s)
      Sawada, Y., T. Koike, E. Ikoma, and M. Kitsuregawa
    • Journal Title

      IEEE Transactions on Geoscience and Remote Sensing

      Volume: 58 Issue: 1 Pages: 14-33

    • DOI

      10.1109/tgrs.2019.2927342

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Toward High-Resolution Soil Moisture Monitoring by Combining Active-Passive Microwave and Optical Vegetation Remote Sensing Products with Land Surface Model2019

    • Author(s)
      Toride、Sawada、Aida、Koike
    • Journal Title

      Sensors

      Volume: 19 Issue: 18 Pages: 3924-3924

    • DOI

      10.3390/s19183924

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ブラジル北東域における植生動態-陸面結合データ同化手法による長期渇水解析に基づく穀物生産量・必要灌漑水量の推定に関する研究2019

    • Author(s)
      筒井 浩行、澤田 洋平、生駒 英司、喜連川 優、小池 俊雄
    • Journal Title

      水工学論文集

      Volume: 64

    • NAID

      130007940130

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Multi-sector multi-region economic growth model of drought and the value of water: A case study in Pakistan2019

    • Author(s)
      Yokomatsu, M, H. Ishiwata, Y. Sawada, Y. Suzuki, T. Koike, A. Naseer, and M. J. M. Cheema
    • Journal Title

      International Journal of Disaster Risk Reduction

      Volume: 43 Pages: 101368-101368

    • DOI

      10.1016/j.ijdrr.2019.101368

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Quantifying Drought Propagation from Soil Moisture to Vegetation Dynamics Using a Newly Developed Ecohydrological Land Reanalysis2018

    • Author(s)
      Sawada Yohei
    • Journal Title

      Remote Sensing

      Volume: 10 Issue: 8 Pages: 1197-1197

    • DOI

      10.3390/rs10081197

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fusing Microwave and Optical Satellite Observations to Simultaneously Retrieve Surface Soil Moisture, Vegetation Water Content, and Surface Soil Roughness2017

    • Author(s)
      Sawada Yohei、Koike Toshio、Aida Kentaro、Toride Kinya、Walker Jeffrey P.
    • Journal Title

      IEEE Transactions on Geoscience and Remote Sensing

      Volume: 55 Issue: 11 Pages: 6195-6206

    • DOI

      10.1109/tgrs.2017.2722468

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Ground Truth of Passive Microwave Radiative Transfer on Vegetated Land Surfaces2017

    • Author(s)
      Sawada Yohei、Tsutsui Hiroyuki、Koike Toshio
    • Journal Title

      Remote Sensing

      Volume: 9 Issue: 7 Pages: 655-655

    • DOI

      10.3390/rs9070655

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Do surface lateral flows matter for land data assimilation?: Implication for hyper-resolution land modeling and observation2019

    • Author(s)
      Yohei Sawada
    • Organizer
      JpGU annual meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] An ecohydrological land reanalysis by integrating simulation and satellite observations2019

    • Author(s)
      Sawada, Y., T. Nakaegawa, K. Okamoto, and H. Fujii
    • Organizer
      JpGU annual meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] データ駆動型アプローチが加速する地球科学シミュレーションの不確実性定量化2019

    • Author(s)
      澤田 洋平
    • Organizer
      日本気象学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Machine learning accelerates parameter optimization and uncertainty quantification of a land surface model2019

    • Author(s)
      Sawada, Yohei
    • Organizer
      American Geophysical Union Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Satellite microwave observation to monitor and predict ecohydrological conditions: a land data assimilation approach2019

    • Author(s)
      Sawada, Y., H. Tsutsui, T. Koike, E. Ikoma, and M. Kitsuregawa
    • Organizer
      American Geophysical Union Fall Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Toward hyperresolution land data assimilation to monitor terrestrial water, energy, ecosystem, and hydrological disasters2019

    • Author(s)
      Yohei Sawada
    • Organizer
      International Symposium on Data Assimilation 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 生態水文モデリングと衛星データ同化による陸域再解析2018

    • Author(s)
      澤田 洋平
    • Organizer
      次世代陸モデル開発・応用・社会実装に関する合同ワークショップ
    • Related Report
      2018 Research-status Report
  • [Presentation] 衛星観測マイクロ波放射輝度を同化した陸域水文・生態系の再解析2018

    • Author(s)
      澤田 洋平
    • Organizer
      日本気象学会春季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Eco-hydrological land data assimilation to monitor terrestrial water, ecosystem, and hydrological disasters2018

    • Author(s)
      Yohei Sawada
    • Organizer
      Japan Geoscience Union Annual meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Ecohydrological Land Analysis: Assimilating satellite microwave observations into a land surface model to simultaneously simulate soil moisture and vegetation dynamics2018

    • Author(s)
      Yohei Sawada
    • Organizer
      Joint Workshop of the 2nd International Surface Working Group (ISWG) and 8th Land Surface Analysis Satellite Application Facility (LSA-SAF)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Do lateral flows matter for data assimilation of soil moisture observation into hyperresolution hydrological models?2018

    • Author(s)
      Yohei Sawada
    • Organizer
      American Geophysical Union Fall Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Towards ecohydrological drought monitoring and prediction using a land data assimilation system2017

    • Author(s)
      Yohei Sawada
    • Organizer
      Hydrology delivers Earth System Sciences to Society 4
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ecohydrological drought monitoring and prediction using a land data assimilation system2017

    • Author(s)
      Yohei Sawada
    • Organizer
      American Geophysical Union Fall Meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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