Journal
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES
Volume 61, Issue 10, Pages 1813-1830Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02626667.2015.1040020
Keywords
Satellite precipitation; error characteristics; Huai River basin; statistical evaluation; raingauge observation
Categories
Funding
- National Science Foundation of China [41401017, 51379056, 91437214]
- Open Fund of Meteorological Center of Huai River basin [HRM201204]
- Open Foundation of State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering [2014490911]
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, SOA [SOED1414]
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This study focuses on quantifying the error characteristics of four widely utilized satellite precipitation products (i.e. TMPA 3B42RTV7, TMPA 3B42V7, CMORPH and PERSIANN-CDR) for a five-year period (2005-2009) using an independent raingauge network over the upper-middle Huai River basin in central-eastern China. Assessment results show that CMORPH generally exhibits the best performance with slight underestimation, while 3B42RTV7 has the worst performance with large positive biases. Additionally, 3B42V7 and PERSIANN-CDR tend to have an approximate accuracy. The monthly gauge adjustment applied to 3B42V7 and PERSIANN-CDR significantly reduces their systematic bias and in particular it makes these two research products maintain a stable skill level during winter. As for the heavy rainfall events (>50mm/d) in summer, 3B42V7 and CMORPH exhibit a relatively better degree of agreement to the gauge observations. Overall, our study suggests that the satellite-based precipitation estimates all have their own pros and cons at different spatiotemporal scales. We expect the results reported here will provide a better understanding of current mainstream satellite precipitation products over similar medium-sized humid basins.
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