气候变化领域集成服务门户(CCPortal): Lagged Compound Occurrence of Droughts and Pluvials Globally Over the Past Seven Decades

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DOI	10.1029/2020GL087924
	Lagged Compound Occurrence of Droughts and Pluvials Globally Over the Past Seven Decades
	He X.; Sheffield J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	The drought-pluvial seesaw—defined as the phenomenon of pluvials (wet spells) following droughts (dry spells)—magnifies the impact of individual pluvial and drought events yet has not been systematically evaluated, especially at the global scale. We apply an event coincidence analysis to explore the aggregated seesaw behavior based on land surface model simulations for the past seven decades (1950–2016). We find that globally, about 5.9% and 7.6% of the land surface have experienced statistically significant (p<0.10) drought-pluvial seesaw behavior during the boreal spring-summer and fall-winter, with an average 11.1% and 11.4% of all droughts being followed by pluvials in the following season, respectively. Although this global frequency pattern is modest and coherent changes cannot be detected at the subcontinental scale, local hot spots of drought-pluvial seesaw have become more frequent than either droughts or pluvials alone in the last three decades, albeit with a small percentage of area coverage. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Surface measurement; Area coverages; Behavior-based; Boreal Spring; Coincidence analysis; Frequency patterns; Global scale; Land surface; Land surface modeling; Drought; decadal variation; detection method; drought; global change; land surface
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170116
作者单位	Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, United States; Water in the West, Woods Institute for the Environment, Stanford University, Stanford, CA, United States; Geography and Environment, University of Southampton, Southampton, United Kingdom
推荐引用方式 GB/T 7714	He X.,Sheffield J.. Lagged Compound Occurrence of Droughts and Pluvials Globally Over the Past Seven Decades[J],2020,47(14).
APA	He X.,&Sheffield J..(2020).Lagged Compound Occurrence of Droughts and Pluvials Globally Over the Past Seven Decades.Geophysical Research Letters,47(14).
MLA	He X.,et al."Lagged Compound Occurrence of Droughts and Pluvials Globally Over the Past Seven Decades".Geophysical Research Letters 47.14(2020).