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Development of global estimation algorithms for soil moisture and vegetation amount using Tropical Rainfall Measuring Mission (TRMM) data

Research Project

Project/Area Number 13555140
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 水工水理学
Research InstitutionThe university of Tokyo

Principal Investigator

MUSIAKE Katumi  The university of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (50011060)

Co-Investigator(Kenkyū-buntansha) KITSUREGAWA Masaru  The university of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (40161509)
KANAE Shinjirou  The university of Tokyo, Institute of Industrial Science, Research Associate, 生産技術研究所, 講師 (20313108)
YASUOKA Yoshifumi  The university of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (50132866)
NAKAEGAWA Toshiyuki  Japan Meteorological Research Institute, Climate Research Department, Researcher, 気候研究部, 研究官
OKI Taikan  The university of Tokyo, Institute of Industrial Science, Associate Professor, 生産技術研究所, 助教授 (50221148)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 2002: ¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 2001: ¥7,200,000 (Direct Cost: ¥7,200,000)
KeywordsRemote Sensing / Soil Moisture / Tropical Rainfall Measuring Mission / Land Surface Atomosphere Ineraction / 衛星リモートセンシング / 地球観測 / データベース / 地球環境
Research Abstract

Two microwave sensors on board Tropical Rainfall Measuring Mission (TRMM), Precipitation Radar (PR) and TRMM Microwave Imager (TMI), are used to make gtobalsurface soil moisture map in this research. Firstly, a soil moisture estimation algorithm from TRMM/PR is developed. In this algorithm, the backscattering coefficients at land surface observed by TRMM/PR are used. As the backscattering coefficients are attenuated by strong rainfall, the data observed during rainfall is not included in our calculation. TRMM/PR has poor spatial resolution compared with Synthetic Aperture Radar (SAR), but the observation frequency (temporal resolution) is as high as passive microwave sensors. Though TRMM/PR observes by multiple incident angles from 0 to 18 degree, our algorithm is basically designed for the observations by 12 degree. It is shown by a sensitivity analysis that the backscattering coefficients are less affected by the ratio of surface vegetation cover when they are observed by 12 degree. … More However, if the temporal change of vegetation cover ratio is not significant, the observations by among 3 to 18 degree are well correlated with those by 12 degree. In such case, our algorithm can be applied to large number of observations by 3 to 18 degrees. Secondly, another soil moisture estimation algorithm from TRMM/TMI is developed. A microwave transfer model in soil-vegetation-atmosphere layers is used to retrieve soil moisture from single index such as polarization difference (PD) / frequency difference (FD) of brightness temperatures. Soil moisture estimates from different algorithms are compared to each other and are compared with estimates from TRMM/PR. In order to simulate realistic seasonal variation of soil moisture, it is necessary to give monthly Leaf Area Index (LAI) data from other satellite information. Other vegetation parameters (eg. Stem Area Index (SAI)) and soil roughness are also important because they significantly affect the sensitivity of PD/FD against LAI. PD of 10GHz is the best index to retrieve soil moisture because this is less affected by atmosphere and this has high sensitivily against soil moisture. Finally, these two algorithms by two sensors are applied to make global dataset of surface soil moisture in three years (1998-2000) with daily time step. Diurnal variations of these estimates are examined and the advantages of both methods are discussed. Less

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 瀬戸心太, 沖大幹, 虫明功臣: "植生層の放射伝達を詳細に考慮したマイクロ波放射計による土壌水分推定"土木学論文集. 47. 49-54 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yukiko Hirabayashi, Sinjiro Kanae, Taikan Oki, Katumi Musiake: "Application of satellite-based surface soil moisture date to simulating seasona precipiation"Journal of Hydrometeorology. (accepted). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.Chapelon, H.Douville, P.Kosuth, T.Oki: "Off-line simulation of the Amazon water balance : a sensitivity study with implications for GSWP"Clim, Dynamics. 19. 141-154 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 瀬戸心太, 沖大幹, 鼎信次郎, 虫明功臣: "TRMM/PRなどのマイクロ波リモートセンサを用いた土壌水分および植生情報の抽出"第三回水文過程のリモートセンシングとその応用に関するワークショップ. 3. 33-41 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Shinta SETO, Taikan OKI, Katumi MUSIAKE: "Soil moisture estimation by passive microwave imager focusing on radiation transfer in vegetation layer"Annual Journal of Hydraulic Engineering. JSCE Vol. 47. 49-54 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yukiko Hirabayashi, Shinjiro Kanae, Taikan Oki, and Katumi Musiake: "Application of satellite-based surface soil moisture date to simulating seasonal precipiation"Journal of Hydrometeorology. accepted. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.Chapelon, H.Douville, P.Kosuth, and T.Oki: "Off-line simulation of the Amazon water balance : a sensitivity study with implications for GSWP"Clin. Dynamics. 19. 141-154 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Shinta SETO, Taikan OKI, Shinjirou KANAE, Katumi MUSIAKE: "Retrieval and Analysis of soil moisture and vegetation by TRMM/PR and other microwave sensors"Third Workshop on Remote Sensing of Hydrological Processes and Applications. 3. 3341 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 瀬戸心太, 沖大幹, 虫明功臣: "植生層の放射伝達を詳細に考慮したマイクロ波放射計による土壌水分推定"水工学論文集. 47. 49-54 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yukiko Hirabayashi, Shinjiro Kanae, Taikan Oki, Katumi Musiake: "Application of satellite-based surface soil moisture data to simulating seasonal precipiation"Journal of Hydrometeorology. (accepted). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Chapelon, H.Douville, P.Kosuth, T.Oki: "Off-line simulation of the Amazon water balance : a sensitivity study with implications for GSWP"Clim. Dynamics. 19. 141-154 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 瀬戸心太, 沖大幹, 鼎信次郎, 虫明功臣: "TRMM/PRなどのマイクロ波リモートセンサを用いた土壌水分および植生情報の抽出"第3回水文過程のリモートセンシングとその応用に関するワークショップ. 3. 33-41 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Tosiyuki Nakaegawa, Taikan Oki, Katumi Musiake: "Aggregation criteria for surface heat balances in a heterogeneous area based on a linear model"Advances in Water Resources. 24. 1159-1171 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 生駒 栄司, 沖 大幹, 喜連川 優: "土壌・地表面気候データを中心とする地球環境デジタルライブラリの試作"情報処理学会論文誌:データベース. 42. 43-55 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Shinta Seto, Taikan Oki, Katumi Musiake: "Hydrological Application of Land Surface Backscattering Coefficients Observed by Low-resolution Radars from Space"Proc. the 5th Int. Symposium on Hydrological Applications of Weather Radar-Radar Hydrology-,. 533-538 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 平林 由希子, 瀬戸 心太, 沖 大幹, 虫明功臣, 竹澤洋, 沖理子: "TRMM/PRによる2000年モザンビーク洪水の検出"自然災害科学. 20-2. 145-147 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Seto, Y.Hirabayashi, S.Kanae, T.Oki, K.Musiake: "Seasonal variation of land surface backscattering coefficients of TRMM/PR and its relationship with soil moisture"IEEE Transaction of Remote Sensing. (submitted).

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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