气候变化领域集成服务门户(CCPortal): Hot extremes have become drier in the United States Southwest

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DOI	10.1038/s41558-021-01076-9
	Hot extremes have become drier in the United States Southwest
	McKinnon K.A.; Poppick A.; Simpson I.R.
发表日期	2021
ISSN	1758-678X
起始页码	598
结束页码	604
卷号	11 期号:7
英文摘要	The impacts of summer heat extremes are mediated by humidity. Increases in temperatures due to human-caused climate change are generally expected to increase specific humidity; however, it remains unclear how humidity extremes may change, especially in climatologically dry (low-humidity) regions. Here we show that specific humidity on dry days during summer (defined here as July–September) has decreased over the past seven decades in the United States Southwest, and that the greatest decreases co-occur with the hottest temperatures. Hot, dry summers have anomalously low evapotranspiration that is linked to low summer soil moisture. The recent decrease in summer soil moisture is explained by declines in June soil moisture, whereas the interannual variability is controlled by summer precipitation. Future projections of hot, dry days in the Southwest are uncertain due to the large spread in the Coupled Model Intercomparison Project phase 6 (CMIP6) trends in soil moisture and precipitation through 2100. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237296
作者单位	Department of Statistics and Institute of the Environment and Sustainability, University of California, Los Angeles, CA, United States; Department of Mathematics and Statistics, Carleton College, Northfield, MN, United States; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	McKinnon K.A.,Poppick A.,Simpson I.R.. Hot extremes have become drier in the United States Southwest[J],2021,11(7).
APA	McKinnon K.A.,Poppick A.,&Simpson I.R..(2021).Hot extremes have become drier in the United States Southwest.Nature Climate Change,11(7).
MLA	McKinnon K.A.,et al."Hot extremes have become drier in the United States Southwest".Nature Climate Change 11.7(2021).