Assessment of Precipitation Error Propagation in Discharge Simulations Over the Contiguous United States
AUGUST 2021 N A N D I N G E T A L . 1987 Assessment of Precipitation Error Propagation in Discharge Simulations over the Contiguous United States a,b a,b,c d e f g NERGUI NANDING, HUAN WU, JING TAO, VIVIANA MAGGIONI, HYLKE E. BECK, NAIJUN ZHOU, h a MAOYI HUANG, AND ZHIJUN HUANG a Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou, China b Southern Marine Science and Engineering Laboratory, Zhuhai, China c Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, Maryland d Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California e George Mason University, Fairfax, Virginia f Joint Research Centre, European Commission, Ispra, Italy g Department of Geographical Sciences, University of Maryland, College Park, College Park, Maryland h NOAA/National Weather Service/Office of Science and Technology Integration, Silver Spring, Maryland (Manuscript received 9 September 2020, in final form 3 May 2021) ABSTRACT: This study characterizes precipitation error propagation through a distributed hydrological model based on the river basins across the contiguous United States (CONUS), to better understand the relationship between errors in precipitation inputs and simulated discharge (i.e., P–Q error relationship). The NLDAS-2 precipitation and its simulated discharge are used as the reference to compare with TMPA-3B42 V7, TMPA-3B42RT V7, Stage IV, CPC-U, MERRA-2, and MSWEP V2.2 for 1548 well-gauged river basins. The relative errors in multiple conventional precipitation products and their corresponding discharges are analyzed for the period of 2002–13.
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