[1]YANG Xiaoliu,WANG Ping,GAO Dawei,et al.Accuracy Evaluation and Analysis on Change Characteristics of MSWEP Precipitation Data in Qinbashan Mountains Area from 1979 to 2014[J].Research of Soil and Water Conservation,2020,27(06):146-152.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
146-152
Column:
目次
Public date:
2020-10-20
- Title:
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Accuracy Evaluation and Analysis on Change Characteristics of MSWEP Precipitation Data in Qinbashan Mountains Area from 1979 to 2014
- Author(s):
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YANG Xiaoliu, WANG Ping, GAO Dawei, YANG Xing, DING Zhiqiang
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(School of Tourism and Geographic Sciences, Yunnan Normal University, Kunming 650500, China)
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- Keywords:
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MSWEP precipitation data; Qinbashan Mountains area; accuracy evaluation
- CLC:
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P339
- DOI:
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- Abstract:
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To explore Multi-Source Weighted-Ensemble Precipitation(MSWEP)precipitation product adaptability in Qinbashan Mountains, precipitation observation data within the use scope of Qinbashan Mountains sites, the correlation coefficient(CC), root mean square error(RMSE), mean absolute error(MAE), and the relative deviation(Bias), and other indicators were used to evaluate MSWEP precipitation data accuracy, and analyze the site MSWEP precipitation and precipitation change for years. The results show that MSWEP precipitation product is of high precision and good practicability in Qinbashan Mountains area. Whether it is annual, seasonal, monthly scale or single site accuracy evaluation, the CC is above 0.8 with high consistency. With respect to RMSE and MAE, the MSWEP precipitation data is close to the measured value of the site. From the perspective of relative Bias, MSWEP precipitation product slightly underestimates or overestimates the measured value. In the past 36 years, except for the MSWEP data, which showed the increasing trend in spring, the precipitation of the other two periods showed the decreasing trend. During the whole period, both kinds of precipitation showed two stages of ‘increase—decrease', and the abrupt year occurred in 1985. In addition, there is an obvious ‘rich—dry' alternating change cycle, and the main change cycle is medium and long time period, which is more than 20 years. Among them, the main change cycle of site measured data is 2 years shorter than MSWEP precipitation.