气候变化领域集成服务门户(CCPortal): Global snow drought hot spots and characteristics

CCPortal

DOI	10.1073/PNAS.1915921117
	Global snow drought hot spots and characteristics
	Huning L.S.; AghaKouchak A.
发表日期	2020
ISSN	0027-8424
起始页码	19753
结束页码	19759
卷号	117 期号:33
英文摘要	Snow plays a fundamental role in global water resources, climate, and biogeochemical processes; however, no global snow drought assessments currently exist. Changes in the duration and intensity of droughts can significantly impact ecosystems, food and water security, agriculture, hydropower, and the socioeconomics of a region. We characterize the duration and intensity of snow droughts (snow water equivalent deficits) worldwide and differences in their distributions over 1980 to 2018. We find that snow droughts became more prevalent, intensified, and lengthened across the western United States (WUS). Eastern Russia, Europe, and the WUS emerged as hot spots for snow droughts, experiencing ∼2, 16, and 28% longer snow drought durations, respectively, in the latter half of 1980 to 2018. In this second half of the record, these regions exhibited a higher probability (relative to the first half of the record) of having a snow drought exceed the average intensity from the first period by 3, 4, and 15%. The Hindu Kush and Central Asia, extratropical Andes, greater Himalayas, and Patagonia, however, experienced decreases (percent changes) in the average snow drought duration (−4, −7, −8, and −16%, respectively). Although we do not attempt to separate natural and human influences with a detailed attribution analysis, we discuss some relevant physical processes (e.g., Arctic amplification and polar vortex movement) that likely contribute to observed changes in snow drought characteristics. We also demonstrate how our framework can facilitate drought monitoring and assessment by examining two snow deficits that posed large socioeconomic challenges in the WUS (2014/2015) and Afghanistan (2017/2018). © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Climate; Drought; Hydrology; Snow; Water resources
语种	英语
scopus关键词	Article; climate change; environmental economics; environmental impact; Europe; geographic distribution; priority journal; Russian Federation; snow cover; snow drought; snowmelt runoff; socioeconomics; United States; water supply
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158846
作者单位	Huning, L.S., Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697, United States; AghaKouchak, A., Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697, United States, Department of Earth System Science, University of California, Irvine, CA 92697, United States
推荐引用方式 GB/T 7714	Huning L.S.,AghaKouchak A.. Global snow drought hot spots and characteristics[J],2020,117(33).
APA	Huning L.S.,&AghaKouchak A..(2020).Global snow drought hot spots and characteristics.Proceedings of the National Academy of Sciences of the United States of America,117(33).
MLA	Huning L.S.,et al."Global snow drought hot spots and characteristics".Proceedings of the National Academy of Sciences of the United States of America 117.33(2020).