气候变化领域集成服务门户(CCPortal): Anthropogenic climate change versus internal climate variability: Impacts on snow cover in the Swiss Alps

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DOI	10.5194/tc-14-2909-2020
	Anthropogenic climate change versus internal climate variability: Impacts on snow cover in the Swiss Alps
	Willibald F.; Kotlarski S.; Grêt-Regamey A.; Ludwig R.
发表日期	2020
ISSN	19940416
起始页码	2909
结束页码	2924
卷号	14 期号:9
英文摘要	Snow is a sensitive component of the climate system. In many parts of the world, water stored as snow is a vital resource for agriculture, tourism and the energy sector. As uncertainties in climate change assessments are still relatively large, it is important to investigate the interdependencies between internal climate variability and anthropogenic climate change and their impacts on snow cover. We use regional climate model data from a new single-model large ensemble with 50 members (ClimEX LE) as a driver for the physically based snow model SNOWPACK at eight locations across the Swiss Alps. We estimate the contribution of internal climate variability to uncertainties in future snow trends by applying a Mann-Kendall test for consecutive future periods of different lengths (between 30 and 100 years) until the end of the 21st century. Under RCP8.5, we find probabilities between 10% and 60% that there will be no significant negative trend in future mean snow depths over a period of 50 years. While it is important to understand the contribution of internal climate variability to uncertainties in future snow trends, it is likely that the variability of snow depth itself changes with anthropogenic forcing. We find that relative to the mean, interannual variability of snow increases in the future. A decrease in future mean snow depths, superimposed by increases in interannual variability, will exacerbate the already existing uncertainties that snow-dependent economies will have to face in the future. © 2020 Author(s).
英文关键词	anthropogenic effect; climate change; climate modeling; probability; regional climate; snow cover; trend analysis; uncertainty analysis; Alps; Switzerland
语种	英语
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/202248
作者单位	Planning of Landscape and Urban Systems, Institute for Spatial and Landscape Planning, Eth Zurich, Zurich, Switzerland; Institute of Science Technology and Policy, Eth Zurich, Zurich, Switzerland; Federal Office of Meteorology and Climatology MeteoSwiss, Zurich-Airport, Switzerland; Department of Geography, Ludwig-Maximilians-University Munich, Munich, Germany
推荐引用方式 GB/T 7714	Willibald F.,Kotlarski S.,Grêt-Regamey A.,et al. Anthropogenic climate change versus internal climate variability: Impacts on snow cover in the Swiss Alps[J],2020,14(9).
APA	Willibald F.,Kotlarski S.,Grêt-Regamey A.,&Ludwig R..(2020).Anthropogenic climate change versus internal climate variability: Impacts on snow cover in the Swiss Alps.Cryosphere,14(9).
MLA	Willibald F.,et al."Anthropogenic climate change versus internal climate variability: Impacts on snow cover in the Swiss Alps".Cryosphere 14.9(2020).