Extensive evaluation of IMERG precipitation for both liquid and solid in Yellow River source region

doi:10.1016/j.atmosres.2021.105570

	Extensive evaluation of IMERG precipitation for both liquid and solid in Yellow River source region
	Meng, Chengcheng 1,2; Mo, Xingguo 1,2,3; Liu, Suxia 1,2,3; Hu, Shi 2
刊名	ATMOSPHERIC RESEARCH
	2021-07-01
卷号	256 页码:12
关键词	Satellite precipitation Global precipitation measurement mission (GPM) Validation Northeastern Tibetan Plateau
ISSN号	0169-8095
DOI	10.1016/j.atmosres.2021.105570
通讯作者	Mo, Xingguo(moxg@igsnrr.ac.cn)
英文摘要	The Integrated Multi-satellitE Retrievals for Global Precipitation Measurement (IMERG) produces highresolution precipitation estimates and serves as an invaluable data source for data-scarce and ungauged basins. This study comprehensively evaluates two near-real time products (IMERG-E and IMERG-L) and a post-real time dataset (IMERG-F) of IMERG V06B from 2014 to 2019 on basin and grid scales in the Yellow River source region, a data-sparse basin in the northeastern Tibetan Plateau. Results show that the three IMERG products can well depict the spatial distribution of precipitation in the study area. Compared with IMERG-E and IMERG-L, the gauge-adjusted IMERG-F shows better agreement and event detection on both basin and grid scale, yet is limited in improving data accuracy. The near-real time products, IMERG-E and IMERG-L, underestimate precipitation across the basin (--37.82% and --38.55%, respectively). At the same time, post-real time product exhibits negative errors in drier areas and positive errors in wetter regions that are roughly separated by the basin?s 3900 m contour. The correlation, error metrics, and detecting ability of the three products upgrade from northwest to southeast as the climate becomes wet. Temporal properties exhibit dependence on meteorological conditions. Specifically, the performance in the wet season is superior to that in the dry season. For instance, the normalized root mean square error for IMERG-F was reduced by 55.10% from dry season to wet season. IMERG products? capability to detect precipitation is affected by temporal scale, intensity, and phase. The reliability of these satellite precipitation products increases when the time interval extends from daily to monthly. IMERG can better estimate moderate precipitation, especially in the range of 5?10 mm/d. The products generally perform worse for solid precipitation than for liquid one. However, interactions of precipitation phases and intensities lead to a decrease in accuracy for light precipitation (<5 mm/d) but an increase for moderate events (?5 mm/d) when the phase transforms from solid to liquid. Uncertainty of reference data results in an underestimation of product quality. These findings provide a useful reference for the application of IMERG products in cold mountainous areas and reveal the needs for an exhaustive calibration, especially for solid precipitation.
资助项目	National Key Research and Development Program of China, China[2018YFE0106500] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program, China[2019QZKK0403] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program, China[2019QZKK0903]
WOS关键词	PASSIVE MICROWAVE ; ANALYSIS TMPA ; SATELLITE ; PRODUCTS ; GPM ; GAUGE ; RADAR ; GSMAP ; DENSITY ; CHINA
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000647566500002
资助机构	National Key Research and Development Program of China, China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program, China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162689]
专题	中国科学院地理科学与资源研究所
通讯作者	Mo, Xingguo
作者单位	1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Meng, Chengcheng,Mo, Xingguo,Liu, Suxia,et al. Extensive evaluation of IMERG precipitation for both liquid and solid in Yellow River source region[J]. ATMOSPHERIC RESEARCH,2021,256:12.
APA	Meng, Chengcheng,Mo, Xingguo,Liu, Suxia,&Hu, Shi.(2021).Extensive evaluation of IMERG precipitation for both liquid and solid in Yellow River source region.ATMOSPHERIC RESEARCH,256,12.
MLA	Meng, Chengcheng,et al."Extensive evaluation of IMERG precipitation for both liquid and solid in Yellow River source region".ATMOSPHERIC RESEARCH 256(2021):12.