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DOI	10.1175/JAMC-D-19-0217.1
	Utilizing Objective Drought Severity Thresholds to Improve Drought Monitoring
	Leasor, Zachary T.1; Quiring, Steven M.1; Svoboda, Mark D.2
通讯作者	Leasor, Zachary T.
来源期刊	JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
ISSN	1558-8424
EISSN	1558-8432
出版年	2020
卷号	59 期号:3 页码:455-475
英文摘要	Drought is a prominent climatic hazard in the south-central United States. Drought severity is frequently classified using the categories established by the U.S. Drought Monitor (USDM). This study evaluates whether the thresholds for the standardized precipitation index (SPI) used by the USDM accurately classify drought severity. This study uses the SPI based on PRISM precipitation data from 1900 to 2015 to evaluate drought severity in Texas, Oklahoma, and Kansas. The results show that the fixed SPI thresholds for the USDM drought categories may lead to a systematic underestimation of drought severity in arid regions. To address this issue, objective drought thresholds were developed at each location by fitting a cumulative distribution function at each location to ensure that the observed frequency of drought in each severity category (D0-D4) matched the theoretical expectations of the USDM. This approach reduces the systematic biases in drought severity across the western portion of the study region. Therefore, we recommend developing objective drought thresholds for each location and SPI time scale (e.g., 1, 3, and 6 months). This method can be used to develop objective drought thresholds for any drought index and climate region of interest.
英文关键词	North America Drought Atmosphere-land interaction Hydrometeorology Classification Decision support
类型	Article
语种	英语
国家	USA
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000522402000007
WOS关键词	STANDARDIZED PRECIPITATION INDEX ; CLIMATOLOGICAL DROUGHT ; SUMMER PRECIPITATION ; UNITED-STATES ; FREQUENCY
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314867
作者单位	1.Ohio State Univ, Atmospher Sci Program, Dept Geog, Columbus, OH 43210 USA; 2.Univ Nebraska, Natl Drought Mitigat Ctr, Sch Nat Resources, Lincoln, NE USA
推荐引用方式 GB/T 7714	Leasor, Zachary T.,Quiring, Steven M.,Svoboda, Mark D.. Utilizing Objective Drought Severity Thresholds to Improve Drought Monitoring[J],2020,59(3):455-475.
APA	Leasor, Zachary T.,Quiring, Steven M.,&Svoboda, Mark D..(2020).Utilizing Objective Drought Severity Thresholds to Improve Drought Monitoring.JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY,59(3),455-475.
MLA	Leasor, Zachary T.,et al."Utilizing Objective Drought Severity Thresholds to Improve Drought Monitoring".JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY 59.3(2020):455-475.