气候变化领域集成服务门户(CCPortal): Snowmelt response to simulated warming across a large elevation gradient, southern sierra Nevada, California

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DOI	10.5194/tc-11-2847-2017
	Snowmelt response to simulated warming across a large elevation gradient, southern sierra Nevada, California
	Musselman K.N.; Keitholotch N.P.; Mar N.; Mgulis S.A.
发表日期	2017
ISSN	19940416
卷号	11 期号:6
英文摘要	In a warmer climate, the fraction of annual meltwater produced at high melt rates in mountainous areas is projected to decline due to a contraction of the snow-cover season, causing melt to occur earlier and under lower energy conditions. How snowmelt rates, including extreme events relevant to flood risk, may respond to a range of warming over a mountain front is poorly known. We present a model sensitivity study of snowmelt response to warming across a 3600m elevation gradient in the southern Sierra Nevada, USA. A snow model was run for three distinct years and verified against extensive ground observations. To simulate the impact of climate warming on meltwater production, measured meteorological conditions were modified by +1 to +6 °C. The total annual snow water volume exhibited linear reductions (-10%°C-1/ consistent with previous studies. However, the sensitivity of snowmelt rates to successive degrees of warming varied nonlinearly with elevation. Middle elevations and years with more snowfall were prone to the largest reductions in snowmelt rates, with lesser changes simulated at higher elevations. Importantly, simulated warming causes extreme daily snowmelt (99th percentiles) to increase in spatial extent and intensity, and shift from spring to winter. The results offer insight into the sensitivity of mountain snow water resources and how the rate and timing of water availability may change in a warmer climate. The identification of future climate conditions that may increase extreme melt events is needed to address the climate resilience of regional flood control systems. © Author(s) 2017.
学科领域	elevation; extreme event; flood control; meltwater; mountain region; simulation; snow cover; snow water equivalent; snowmelt; warming; water availability; California; Sierra Nevada [California]; United States
语种	英语
scopus关键词	elevation; extreme event; flood control; meltwater; mountain region; simulation; snow cover; snow water equivalent; snowmelt; warming; water availability; California; Sierra Nevada [California]; United States
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119294
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Institute of Arctic and Alpine Research, Department of Geography, University of Colorado, Boulder, CO, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Civil and Environmental Engineering, University of California, Los Angeles, CA, United States; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Musselman K.N.,Keitholotch N.P.,Mar N.,et al. Snowmelt response to simulated warming across a large elevation gradient, southern sierra Nevada, California[J],2017,11(6).
APA	Musselman K.N.,Keitholotch N.P.,Mar N.,&Mgulis S.A..(2017).Snowmelt response to simulated warming across a large elevation gradient, southern sierra Nevada, California.Cryosphere,11(6).
MLA	Musselman K.N.,et al."Snowmelt response to simulated warming across a large elevation gradient, southern sierra Nevada, California".Cryosphere 11.6(2017).