Evaluation of High-Resolution Satellite Precipitation Products over Very Complex Terrain in Ethiopia
Tóm tắt
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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Tài liệu tham khảo
Barros, 2006, From weather to climate—Seasonal and interannual variability of storms and implications for erosion process in the Himalaya.
Bitew, 2010, Evaluation through independent measurements: Complex terrain and humid tropical region in Ethiopia., 10.1007/978-90-481-2915-7_12
Dinku, 2010, Comparison of CMORPH and TRMM-3B42 over mountainous regions of Africa and South America., 10.1007/978-90-481-2915-7_11
Gebremichael, 2007, Submesoscale spatiotemporal variability of North American monsoon rainfall over complex terrain., J. Climate, 20, 1751, 10.1175/JCLI4093.1
Gochis, 2003, Preliminary diagnostics from a new event-based precipitation monitoring system in support of the North American Monsoon Experiment., J. Hydrometeor., 4, 974, 10.1175/1525-7541(2003)004<0974:PDFANE>2.0.CO;2
Gottschalck, 2005, Analysis of multiple precipitation products and preliminary assessment of their impact on global land data assimilation system land surface states., J. Hydrometeor., 6, 573, 10.1175/JHM437.1
Hong, 2007, Evaluation of PERSIANN-CCS rainfall measurement using the NAME Event Rain Gauge Network., J. Hydrometeor., 8, 469, 10.1175/JHM574.1
Huffman, 2007, The TRMM Multisatellite Precipitation Analysis (TMPA): Quasi-global, multilayer, combined-sensor, precipitation estimates at fine scales., J. Hydrometeor., 8, 38, 10.1175/JHM560.1
Janowiak, 2004, Validation of satellite-derived rainfall estimates and numerical model forecasts of precipitation over the United States.
Joyce, 2004, CMORPH: A method that produces global precipitation estimation from passive microwave and infrared data at high spatial and temporal resolution., J. Hydrometeor., 5, 487, 10.1175/1525-7541(2004)005<0487:CAMTPG>2.0.CO;2
Sorooshian, 2000, Evaluation of PERSIANN system satellite-based estimates of tropical rainfall., Bull. Amer. Meteor. Soc., 81, 2035, 10.1175/1520-0477(2000)081<2035:EOPSSE>2.3.CO;2
Thorne, 2001, Comparison of TAMSAT and CPC rainfall estimates with raingauges for southern Africa., Int. J. Remote Sens., 22, 1951, 10.1080/01431160118816
Wilheit, 1986, Some comments on passive microwave measurement of rain., Bull. Amer. Meteor. Soc., 67, 1226, 10.1175/1520-0477(1986)067<1226:SCOPMM>2.0.CO;2