Multidimensional evaluation of the TRMM 3B43V7 satellite-based precipitation product in mainland China from 1998–2016

PeerJ

article

Ziteng Zhou¹  Bin Guo¹  Youzhe Su¹  Zhongsheng Chen³  Juan Wang⁴ 

[1] Key Laboratory of Geomatics and Digital Technology of Shandong Province, Shandong University of Science and Technology;College of Geomatics, Shandong University of Science and Technology;School of Land and Resources, China West Normal University;College of Science and Information, Qingdao Agricultural University

关键词: TRMM;    Precipitation;    Temporal-spatial variation;    Validation;    China;   

DOI  :  10.7717/peerj.8615

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

This study evaluates the applicability of the Tropical Rain Measurement Mission (TRMM) 3B43V7 product for use throughout mainland China. Four statistical metrics were used based on the observations made by rain gauges; these metrics were the correlation coefficient (R), the relative bias (RB), the root mean square error (RMSE) and Nash-Sutcliffe efficiency (NSE), and they were chosen to evaluate the performance of the 3B43V7 product at temporal and spatial scales. The results revealed that 3B43V7 performed satisfactorily on all timescales (R 0.9 and NSE 0.86); however, it overestimated the results when compared with the rain gauge observations in certain circumstances (RB = 9.7%). Monthly estimates from 3B43V7 were in agreement with rain gauge observations. 3B43V7 can effectively capture the seasonal patterns of precipitation characteristics over mainland China. However, 3B43V7 tends to register a greater overestimation of precipitation in the winter (RB = 14%) than in other seasons while showing greater consistency with the observations made by rain gauges during dry periods. The 3B43V7 product performs well in the eastern part of mainland China, while its performance is poor in the western part of mainland China. In terms of altitude, 3B43V7 performs satisfactorily in areas with moderate to low altitudes (when altitude < 3,500 m, R 0.9, NSE 0.8 and RB < 10.2%) but RB values increase with altitude. Overall, 3B43V7 had a favorable performance throughout mainland China.

【 授权许可】

CC BY