气候变化领域集成服务门户(CCPortal): Effective multi-satellite precipitation fusion procedure conditioned by gauge background fields over the Chinese mainland

CCPortal

DOI	10.1016/j.jhydrol.2022.127783
	Effective multi-satellite precipitation fusion procedure conditioned by gauge background fields over the Chinese mainland
	Li, Weiyue; Jiang, Qin; He, Xiaogang; Sun, Haiqing; Sun, Weiwei; Scaioni, Marco; Chen, Sheng; Li, Xin; Gao, Jun; Hong, Yang
通讯作者	Li, WY ; Jiang, Q (通讯作者)
发表日期	2022
ISSN	0022-1694
EISSN	1879-2707
卷号	610
英文摘要	The accurate estimation of precipitation has a basis for atmospheric and hydrological applications. However, large uncertainties exist in the estimation of regional precipitation derived solely from remote sensing data. Herein, we develop an effective method to fuse multiple satellite-based precipitation products to capitalize on their strengths and maximize their applicability at the 0.25 degrees resolution scale. Specifically, we describe an approach based on bias correction in individual satellite-based products and their merging with up-scaled (1.0 degrees) gauge-based interpolated data to produce finer-resolution (0.25 degrees) data outputs. By focusing on seven regions to generate the estimates of merged precipitation across the Chinese mainland (MPCM), we performed a full evaluation based on a range of error metrics. The results showed that the bias correction procedure can reduce the discrepancies in the individual satellite-based precipitation products. In addition, the mean absolute error values are also considerably reduced (20%-45%) with respect to the original data over the Chinese mainland. Error statistical metrics demonstrated that the MPCM generated considerably better estimates on a daily scale, and performed better than the satellite-based precipitation products across different precipitation thresholds. The intercomparison results clearly states the superiority of the MPCM against Multi-Source Weighted-Ensemble Precipitation version 2 global product. Nonetheless, we also suggest that the large uncertainties in satellite-based products should be paid more attention over mountainous areas where rain gauge data are insufficient.
关键词	RAINFALL-INDUCED LANDSLIDES SPATIAL INTERPOLATION MOUNTAINOUS TERRAIN PASSIVE MICROWAVE SMOOTHING SPLINE GPM IMERG TRMM 3B42 SATELLITE PRODUCTS PERFORMANCE
英文关键词	Merged precipitation; Chinese mainland; Satellite-based precipitation product; Bias correction
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000795148300002
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260773
推荐引用方式 GB/T 7714	Li, Weiyue,Jiang, Qin,He, Xiaogang,et al. Effective multi-satellite precipitation fusion procedure conditioned by gauge background fields over the Chinese mainland[J]. 中国科学院青藏高原研究所,2022,610.
APA	Li, Weiyue.,Jiang, Qin.,He, Xiaogang.,Sun, Haiqing.,Sun, Weiwei.,...&Hong, Yang.(2022).Effective multi-satellite precipitation fusion procedure conditioned by gauge background fields over the Chinese mainland.JOURNAL OF HYDROLOGY,610.
MLA	Li, Weiyue,et al."Effective multi-satellite precipitation fusion procedure conditioned by gauge background fields over the Chinese mainland".JOURNAL OF HYDROLOGY 610(2022).