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The evaluation of latest GPM-Era precipitation data in Yellow River Basin |
Yuanyuan LI1,2, Shaowei NING2( ), Wei DING1, Juliang JIN2, Zheng ZHANG1 |
1.School of Hydraulic Engineering Dalian University of Technology, Dalian 116023, China 2.School of Civil Engineering, Hefei University of Technology, Hefei 230009, China |
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Abstract Based on the data from the rain gauge stations of the Yellow River Basin and using the evaluation index, extreme precipitation index and error analysis method, the authors studied the spatial and temporal variation characteristics of errors and the accuracy of data of two GPM satellite precipitation products (GSMap-gauged and GPM IMERG) obtained from April 2014 to March 2016 and analyzed the extreme precipitation capturing capability of the two products. The results showed that the two products generally underestimated precipitation in the western region of the basin and overestimated precipitation in the eastern part. Compared with GSMap-gauged, IMERG had bigger errors in most areas. In addition, the phenomenon of missing error in IMERG was more obvious due to elevation and precipitation intensity, but IMERG had a more accurate data for micro-precipitation. The daily scale data statistics showed that GSMap-gauged had a better relevance in each sub-basin, and its mean error is smaller. The correlation coefficient value of extreme precipitation index obtained by GSMap-gauged was higher than that of IMERG.
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Keywords
satellite precipitation products
gauge
error
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Corresponding Authors:
Shaowei NING
E-mail: ning@hfut.edu.cn
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Issue Date: 14 March 2019
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