气候变化领域集成服务门户(CCPortal): Global droughts connected by linkages between drought hubs

CCPortal

DOI	10.1038/s41467-022-35531-8
	Global droughts connected by linkages between drought hubs
	Mondal, Somnath; Mishra, Ashok K.; Leung, Ruby; Cook, Benjamin
发表日期	2023
EISSN	2041-1723
卷号	14 期号:1 页码:13
英文摘要	Quantifying the spatial and interconnected structure of regional to continental scale droughts is one of the unsolved global hydrology problems, which is important for understanding the looming risk of mega-scale droughts and the resulting water and food scarcity and their cascading impact on the worldwide economy. Using a Complex Network analysis, this study explores the topological characteristics of global drought events based on the self-calibrated Palmer Drought Severity Index. Event Synchronization is used to measure the strength of association between the onset of droughts at different spatial locations within the time lag of 1-3 months. The network coefficients derived from the synchronization network indicate a highly heterogeneous connectivity structure underlying global drought events. Drought hotspot regions such as Southern Europe, Northeast Brazil, Australia, and Northwest USA behave as drought hubs that synchronize regionally and with other hubs at inter-continental or even inter-hemispheric scale. This observed affinity among drought hubs is equivalent to the 'rich-club phenomenon' in Network Theory, where 'rich' nodes (here, drought hubs) are tightly interconnected to form a club, implicating the possibility of simultaneous large-scale droughts over multiple continents. This study shows prominent synchronous co-evolution of drought events in drought hubs in sub-tropical regions, influenced by sea surface temperature patterns and teleconnections. Such simultaneous occurrence of droughts may have detrimental impacts.
学科领域	Multidisciplinary Sciences
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS记录号	WOS:000928461700007
来源期刊	NATURE COMMUNICATIONS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/274024
作者单位	Clemson University; United States Department of Energy (DOE); Pacific Northwest National Laboratory; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; Columbia University
推荐引用方式 GB/T 7714	Mondal, Somnath,Mishra, Ashok K.,Leung, Ruby,et al. Global droughts connected by linkages between drought hubs[J],2023,14(1):13.
APA	Mondal, Somnath,Mishra, Ashok K.,Leung, Ruby,&Cook, Benjamin.(2023).Global droughts connected by linkages between drought hubs.NATURE COMMUNICATIONS,14(1),13.
MLA	Mondal, Somnath,et al."Global droughts connected by linkages between drought hubs".NATURE COMMUNICATIONS 14.1(2023):13.