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DOI	10.1088/1748-9326/ab2203
	On the use of satellite, gauge, and reanalysis precipitation products for drought studies
	Golian S.; Javadian M.; Behrangi A.
发表日期	2019
ISSN	17489318
卷号	14 期号:7
英文摘要	Precipitation is a critical variable to monitor and predict meteorological drought. The WMO recommended standardized precipitation index (SPI) is calculated from gauge (i.e. GPCC), satellite-gauge (GPCP, CHIRPS), reanalysis (i.e. ERA-Interim, and MERRA-2), and satellite-gauge-reanalysis (i.e. MSWEP) over the global domain. Measured differences among the precipitation datasets include metrics such as percent area under drought, number of drought events, spread and correlation in the number of drought events, and critical success index in capturing moderate and severe-exceptional droughts. As precipitation products are available at different lengths and spatial resolutions, sensitivity of drought metrics to record-length and spatial resolution were explored. The results suggest that precipitation-based drought metrics can vary significantly with the choice of precipitation product, its record-lengths, and spatial resolution. These relationships also vary with the severity of drought events with more severe drought events being more sensitive to the differences in resolution and record length. The quantified variation among the products has to be recognized in the interpretation of drought events when a single or a subset of products used. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	drought; Precipitation; reanalysis; record length; satellite; sensitivity analysis; spatial resolution
语种	英语
scopus关键词	Gages; Image resolution; Precipitation (chemical); Satellites; Sensitivity analysis; Critical variables; Global domain; Meteorological drought; Precipitation products; Reanalysis; record length; Spatial resolution; Standardized precipitation index; Drought
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154525
作者单位	Department of Civil Engineering, Shahrood University of Technology, Shahrood, Iran; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, United States
推荐引用方式 GB/T 7714	Golian S.,Javadian M.,Behrangi A.. On the use of satellite, gauge, and reanalysis precipitation products for drought studies[J],2019,14(7).
APA	Golian S.,Javadian M.,&Behrangi A..(2019).On the use of satellite, gauge, and reanalysis precipitation products for drought studies.Environmental Research Letters,14(7).
MLA	Golian S.,et al."On the use of satellite, gauge, and reanalysis precipitation products for drought studies".Environmental Research Letters 14.7(2019).