气候变化领域集成服务门户(CCPortal): Widespread warming trends in storm temperatures and snowpack fate across the Western United States

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DOI	10.1088/1748-9326/ab763f
	Widespread warming trends in storm temperatures and snowpack fate across the Western United States
	Hu J.M.; Nolin A.W.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Western United States snowpacks are generated by cold-season storms, yet the vast majority of snow trend studies utilize undifferentiated air temperature records. Previous studies do not distinguish between days with and without precipitation, which effectively dilutes temperature trends relevant for snowpack monitoring. We examined trends in cold-season precipitation and impacts on snow in nine mountain regions across the western United States. Using 33 years of daily meteorological data (1984-2016) from 567 Snow Telemetry (SNOTEL) sites and a homogenized daily temperature dataset (TopoWx), we investigated seasonal and regional trends in storm day temperatures, storm day frequency, and resulting snowpack fate. We found widespread warming of 0.4 °C-1.2 °C per decade, especially during the fall and in the Interior West using tests for statistically significant trends. Disaggregation showed that days with precipitation are warming nearly twice as fast as dry days in the fall and winter. We also observed increases in November dry days, increased melt on dry days throughout the accumulation season, spring cooling and declines in daily snowmelt during snow-depleting storm days. These findings demonstrate the importance of disaggregating temperature data to elucidate trends (in storm day frequency, accumulation and melt, and warming and cooling) and their impacts on snow in the western US. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	climate; hydrology; snowpack; warming
语种	英语
scopus关键词	Hydrology; Snow; Storms; climate; Cold season precipitation; Daily temperatures; Meteorological data; snowpack; Temperature trends; warming; Western United States; Atmospheric temperature; air temperature; cooling; data interpretation; ecohydrology; global warming; mountain environment; snowmelt; snowpack; trend analysis; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154163
作者单位	Civil and Environmental Engineering, University of Washington, Seattle, WA 98195, United States; University of Nevada, Reno, United States
推荐引用方式 GB/T 7714	Hu J.M.,Nolin A.W.. Widespread warming trends in storm temperatures and snowpack fate across the Western United States[J],2020,15(3).
APA	Hu J.M.,&Nolin A.W..(2020).Widespread warming trends in storm temperatures and snowpack fate across the Western United States.Environmental Research Letters,15(3).
MLA	Hu J.M.,et al."Widespread warming trends in storm temperatures and snowpack fate across the Western United States".Environmental Research Letters 15.3(2020).