气候变化领域集成服务门户(CCPortal): Effectiveness of drought indices in identifying impacts on major crops across the USA

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DOI	10.3354/cr01519
	Effectiveness of drought indices in identifying impacts on major crops across the USA
	Peña-Gallardo M.; Vicente-Serrano S.M.; Domínguez-Castro F.; Quiring S.; Svoboda M.; Beguería S.; Hannaford J.
发表日期	2018
ISSN	0936-577X
起始页码	221
结束页码	240
卷号	75 期号:3
英文摘要	In North America, the occurrence of extreme drought events has increased significantly in number and severity over the last decades. Past droughts have contributed to lower agricultural productivity in major farming and ranching areas across the US. We evaluated the relationship between drought indices and crop yields across the US for the period 1961−2014. In order to assess the correlations with yields from the major cash crops in the country, we calculated several drought indices commonly used to monitor drought conditions, including 4 Palmer-based and 3 multiscalar indices (Standardized Precipitation Index, Standardized Precipitation Evapotranspiration Index, Standardized Precipitation Drought Index). The 3 multiscalar drought indices were aggregated at 1 to 12 mo timescales. Besides the quantification of the similarities or differences between these drought indices using Pearson correlation coefficients, we identified spatial patterns illustrating this relationship. The results demonstrate that the flexible multiscalar indices can identify drought impacts on different types of crops for a wide range of time periods. The differences in spatial and temporal distribution of the correlations depend on the crop and timescale analyzed, but can also be found within the same type of crop. The moisture conditions during summer and shorter timescales (1 to 3 mo) turn out to be a determining factor for barley, corn, cotton and soybean yields. Therefore, the use of multiscalar drought indices based on both precipitation and the atmospheric evaporative demand (SPEI and SPDI) seems to be a prudent recommendation. © Inter-Research 2018.
英文关键词	Crop yields; Drought; Palmer drought indices; Standardized Precipitation Drought Index; Standardized Precipitation Evapotranspiration Index; Standardized Precipitation Index
语种	英语
scopus关键词	agricultural production; agrometeorology; cash cropping; climate effect; crop production; crop yield; drought stress; evapotranspiration; index method; moisture content; precipitation (climatology); spatiotemporal analysis; United States; Glycine max; Gossypium hirsutum; Hordeum; Zea mays
来源期刊	Climate Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146969
作者单位	Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE−CSIC), Zaragoza, Spain; Atmospheric Sciences Program, Department of Geography, Ohio State University, Columbus, OH 43210, United States; National Drought Mitigation Center, University of Nebraska-Lincoln, Lincoln, NE 68583, United States; Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas (EEAD-CSIC), Zaragoza, Spain; Centre for Ecology and Hydrology, Maclean Building, Crowmarsh Gifford, Wallingford, OX10 8BB, United Kingdom
推荐引用方式 GB/T 7714	Peña-Gallardo M.,Vicente-Serrano S.M.,Domínguez-Castro F.,et al. Effectiveness of drought indices in identifying impacts on major crops across the USA[J],2018,75(3).
APA	Peña-Gallardo M..,Vicente-Serrano S.M..,Domínguez-Castro F..,Quiring S..,Svoboda M..,...&Hannaford J..(2018).Effectiveness of drought indices in identifying impacts on major crops across the USA.Climate Research,75(3).
MLA	Peña-Gallardo M.,et al."Effectiveness of drought indices in identifying impacts on major crops across the USA".Climate Research 75.3(2018).