H175-07
Evaluation and Comparison of Satellite Precipitation Products: IMERG, CMORPH, and CHIRPS over the Blue Nile River Basin

Tuesday, 15 December 2020: 07:24
Virtual
Haorui Sun, University of California Los Angeles, Department of Civil and Environmental Engineering, Los Angeles, CA, United States, Xiaoyu Ma, University of California Los Angeles, Department of Geography, Los Angeles, CA, United States, Yihan Wang, University of California Los Angeles, Department of Civil and Environmental Engineering, Los Angeles, United States, Haowen Yue, University of California, Los Angeles, Civil & Environmental Engineering, Los Angeles, CA, United States and Mekonnen Gebremichael, University of California, Los Angeles, CA, United States
Recorded Presentation
Abstract:
This project evaluates the performance of three satellite-based precipitation products with different temporal and spatial resolutions over the Blue Nile River Basin from 2012 to 2014: NOAA CPC Morphing Technique (CMORPH), Integrated Multi-satellite Retrievals (IMERG), and Climate Hazards Center InfraRed Precipitation with Station data (CHIRPS). Two versions of CMORPH (CMORPH1.0 and CMORPH0.x) and two versions of IMERG (IMERG-early and IMERG-final) are inter-compared and evaluated. Our reference datasets came from experimental rain gauge stations our research group established in the region. Results indicate that all three satellite precipitation products have similar spatial patterns, which are different from what the rain gauges depict. The satellite precipitation products had elevation-dependent bias, with large overestimations in low-elevation areas, and slight underestimations in high-elevation areas. CHIRPS were found to be the least accurate amongst the satellite products.
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