TRMM Precipitation Radar and Microwave Imager Observations of Convective and Stratiform Rain over Land and their Theoretical Implications

スポンサーリンク

概要

• 論文の詳細を見る

• Observations of brightness temperature, Tb, made over land regions by the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) radiometer are analyzed with the help of nearly simultaneous measurements of the vertical profiles of reflectivity factor, Z, made by the Precipitation Radar (PR) onboard the TRMM satellite. Furthermore, this analysis is done separately over convective and stratiform rain regions. This examination reveals a clear relationship between TMI and PR data. Possible explanation for this relationship is explored with the help of radiative transfer calculations. With this approach, we demonstrate that the 85 GHz observations of TMI can be simulated crudely from the observations of Z. However, the 37 and 19 GHz observations are not as well simulated, possibly because of horizontal non-uniformity in the hydrometeor distribution in the broad footprints of these channels and contamination introduced by land-surface emissivity. On the other hand, from TMI and PR observations, we find that the brightness temperature difference (T19-T37) minimizes these sources of error. Our simulations of (T19-T37) over convective rain regions are in reasonable agreement with this finding. This investigation indicates that the TMI 85 GHz channel yields the best information about rain over tropical land, because it has minimal surface contamination, strong extinction, and a fine footprint. The brightness temperature difference (T19-T37) can supplement the information given by the 85 GHz channel.

• 社団法人日本気象学会の論文
• 2002-10-25

著者

• Iacovazzi Jr.

  Earth Resources Technology Inc

• Prabhakara C

  Nasa Goddard Space Flight Center

• Prabhakara C.

  Nasa

• Yoo J‐m

  Ewha Womans University

• IACOVAZZI Jr.

  Goddard Space Flight Center

• YOO J.-M.

  Science Systems and Applications, Inc.

• Prabhakara C.

  Nasa/goddard Space Flight Center Greenbelt

• Yoo J.

  Science Systems and Applications, Inc.

関連論文

• 降雨領域評価に基づくTRMMマイクロ波放射計降雨推定方法
• 陸域に適用可能なマイクロ波放射計降雨推定方法
• Surface Emissivity and Hydrometeors Derived from Microwave Satellite Observations and Model Reanalyses
• A Method to Estimate Rain Rate over Tropical Oceans with the TRMM Microwave Imager Radiometer
• TRMM Precipitation Radar and Microwave Imager Observations of Convective and Stratiform Rain over Land and their Theoretical Implications
• 対流雲と層雲の判別に基づくTRMMマイクロ波放射計降雨強度推定法
• TRMM Observations of Polarization Difference in 85 GHz : Information about Hydrometeors and Rain Rate

スポンサーリンク