干旱区生态环境知识资源中心(Arid): Two-decades of GPM IMERG early and final run products intercomparison: Similarity and difference in climatology, rates, and extremes

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DOI	10.1016/j.jhydrol.2021.125975
	Two-decades of GPM IMERG early and final run products intercomparison: Similarity and difference in climatology, rates, and extremes
	Li, Zhi; Tang, Guoqiang; Hong, Zhen; Chen, Mengye; Gao, Shang; Kirstetter, Pierre; Gourley, Jonathan J.; Wen, Yixin; Yami, Teshome; Nabih, Soumaya; Hong, Yang
通讯作者	Hong, Y (corresponding author), Univ Oklahoma, Sch Civil Engn & Environm Sci, Hydrometeorol & Remote Sensing Lab, Norman, OK 73072 USA.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	594
英文摘要	Precipitation is an essential climate and forcing variable for modeling the global water cycle. Particularly, the recent Integrated Multi-satellite Retrievals for GPM (IMERG) product retrospectively provides an unprecedented two decades of high-resolution satellite precipitation estimates. The primary goal of this study is to examine the similarities and differences between the two latest and also arguably the most popular, GPM IMERG Early and Final Run (ER and FR) products across the globe. The results reveal that: (1) ER systematically estimates 12.0% higher annual rainfall than FR, particularly over land (16.7%); (2) ER and FR show significant differences in instantaneous rates (Root Mean Squared Difference: RMSD = 2.38 mm h(-1) and normalized RMSD: RMSD_norm = 1.09), especially in Africa (RMSD = 2.40 mm h(-1)) and hot, arid regions (RMSD_norm = 1.11), but less so in Europe (RMSD = 2.16 mm h(-1)) and cold areas (RMSD_norm = 0.87); and (3) ER measures 33.0% higher extreme rainfall rates than FR over the globe. The exploration of their similarities and differences provides a first-order global assessment of various hydrological utilities: FR is designed to be more suitable for retrospective hydroclimatology and water resource applications, while the earliest available ER product, though not bias-corrected by rain gauges, still shows potential utility for operational modeling of rainfall-triggered hazards. The findings of this study can provide an assessment to product developers and broader data users and practitioners to address the inherent issues in hardware limitations, retrieval algorithms, and uncertainty quantification for research and applications.
英文关键词	Climatology Extremes Early run Final run GPM IMERG Satellite
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000641589600076
WOS关键词	PRECIPITATION PRODUCTS ; TRMM ; GAUGE ; MICROWAVE ; TMPA
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350881
作者单位	[Li, Zhi; Hong, Zhen; Chen, Mengye; Gao, Shang; Kirstetter, Pierre; Yami, Teshome; Hong, Yang] Univ Oklahoma, Sch Civil Engn & Environm Sci, Hydrometeorol & Remote Sensing Lab, Norman, OK 73072 USA; [Tang, Guoqiang] Univ Saskatchewan, Coldwater Lab, Canmore, AB T1W 3G1, Canada; [Tang, Guoqiang] Univ Saskatchewan, Ctr Hydrol, Saskatoon, SK, Canada; [Gourley, Jonathan J.; Wen, Yixin] NOAA, Natl Severe Storms Lab, Norman, OK 73072 USA; [Wen, Yixin] Cooperat Inst Mesoscale Meteorol Studies, Norman, OK 73072 USA; [Nabih, Soumaya] Sidi Mohamed Ben Abdellah Univ, Dept Environm, Lab Funct Ecol & Environm Engn, Fes 32000, Morocco
推荐引用方式 GB/T 7714	Li, Zhi,Tang, Guoqiang,Hong, Zhen,et al. Two-decades of GPM IMERG early and final run products intercomparison: Similarity and difference in climatology, rates, and extremes[J],2021,594.
APA	Li, Zhi.,Tang, Guoqiang.,Hong, Zhen.,Chen, Mengye.,Gao, Shang.,...&Hong, Yang.(2021).Two-decades of GPM IMERG early and final run products intercomparison: Similarity and difference in climatology, rates, and extremes.JOURNAL OF HYDROLOGY,594.
MLA	Li, Zhi,et al."Two-decades of GPM IMERG early and final run products intercomparison: Similarity and difference in climatology, rates, and extremes".JOURNAL OF HYDROLOGY 594(2021).