Using Dual-polarization Radar to Evaluate Accuracy of GPM/IMERG in Different Types of Precipitation Process
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Abstract:
The precipitation estimation ability of the integrated multi-satellite retrievals for Global Precipitation Measurement (GPM/IMERG) is refined and evaluated in the study for Meiyu, typhoon and squall line precipitation, using the measurements from C-band dual-polarization radar from the Nanjing University of Information Science & Technology (NUIST-CDP). The ground-based gauges are used to calibrate the radar data. The main conclusions are: (1) IMERG overestimates the cumulative precipitation estimated by NUISTCDP during Meiyu precipitation. (2) During typhoon precipitation, when the cumulative precipitation estimated by NUIST-CDP is large, IMERG greatly underestimates the precipitation of NUIST-CDP. (3) IMERG performs poorly during squall line precipitation because it hardly observes heavy precipitation.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.