Evaluation of High-Resolution Satellite Precipitation Products over Very Complex Terrain in Ethiopia

Journal of Applied Meteorology and Climatology - Tập 49 Số 5 - Trang 1044-1051 - 2010
Feyera A. Hirpa1, Mekonnen Gebremichael1, T. M. Hopson2
1Department of Civil and Environmental Engineering, University of Connecticut, Storrs, Connecticut
2National Center for Atmospheric Research Boulder, Colorado

Tóm tắt

Abstract This study focuses on the evaluation of 3-hourly, 0.25° × 0.25°, satellite-based precipitation products: the Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA) 3B42RT, the NOAA/Climate Prediction Center morphing technique (CMORPH), and Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks (PERSIANN). CMORPH is primarily microwave based, 3B42RT is primarily microwave based when microwave data are available and infrared based when microwave data are not available, and PERSIANN is primarily infrared based. The results show that 1) 3B42RT and CMORPH give similar rainfall fields (in terms of bias, spatial structure, elevation-dependent trend, and distribution function), which are different from PERSIANN rainfall fields; 2) PERSIANN does not show the elevation-dependent trend observed in rain gauge values, 3B42RT, and CMORPH; and 3) PERSIANN considerably underestimates rainfall in high-elevation areas.

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Thông tin xuất bản

Journal of Applied Meteorology and Climatology

Tập 49 Số 5

1044-1051

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