干旱区生态环境知识资源中心(Arid): The sensitivity of snow ephemerality to warming climate across an arid to montane vegetation gradient

Arid

DOI	10.1002/eco.2060
	The sensitivity of snow ephemerality to warming climate across an arid to montane vegetation gradient
	Petersky, Rose S.1; Shoemaker, Kevin T.2; Weisberg, Peter J.2,3; Harpold, Adrian A.2,3
通讯作者	Harpold, Adrian A.
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2019
卷号	12 期号:2
英文摘要	Shifts from longer seasonal snowpacks to shorter, ephemeral snowpacks (snowpacks that persist for <60days) due to climate change will alter the timing and rates of water availability. Ephemeral snowmelt has less predictable timing and lowers soil water availability during the growing season. The Great Basin, United States is an ideal system to study snow ephemerality across a broad climate gradient. To identify the climatic controls on snow ephemerality, we analysed moderate resolution imaging spectroradiometer (MODIS) snow-covered products from water years 2001-2015 using an object-based mapping approach and a random forest model. Winter temperature and precipitation were the most influential variables on the maximum snow duration. We predict that warming the average winter air temperature by 2 and 4 degrees C would reduce the areal extent of seasonal snow by 14.7 and 47.8%, respectively (8.8% of the Great Basin's areal extent is seasonal in the historical record), with shifts to ephemeral snowpack concentrated in lower elevations and warmer regions. The combination of warming and interannual precipitation variability (i.e., reductions of 25%) had different effects on vegetation types. Vegetation types that have had consistent seasonal snow cover in their historical record are likely to have lower resilience to a new hydrologic regime, with earlier and more intermittent snowmelt causing a longer but drier growing season. Implications of increased snow ephemerality on vegetation productivity and susceptibility to disturbance will depend on local topography, subsurface water storage, and physiological adaptations. Nevertheless, patterns found in this study can help target management intervention to species that are most at risk.
英文关键词	climate change ephemeral snow ecohydrology great basin usa remote sensing snow hydrology
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000461581900007
WOS关键词	SOIL-MOISTURE RESPONSE ; WESTERN US ; METEOROLOGICAL DATA ; SEVERE DROUGHT ; CARBON UPTAKE ; COVERED AREA ; MORTALITY ; MODIS ; CLASSIFICATION ; ACCUMULATION
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215129
作者单位	1.Univ Nevada, Grad Program Hydrol Sci, Reno, NV 89557 USA; 2.Univ Nevada, Nat Resources & Environm Sci Dept, 1664 N Virginia St, Reno, NV 89557 USA; 3.Univ Nevada, Global Water Ctr, Reno, NV 89557 USA
推荐引用方式 GB/T 7714	Petersky, Rose S.,Shoemaker, Kevin T.,Weisberg, Peter J.,et al. The sensitivity of snow ephemerality to warming climate across an arid to montane vegetation gradient[J],2019,12(2).
APA	Petersky, Rose S.,Shoemaker, Kevin T.,Weisberg, Peter J.,&Harpold, Adrian A..(2019).The sensitivity of snow ephemerality to warming climate across an arid to montane vegetation gradient.ECOHYDROLOGY,12(2).
MLA	Petersky, Rose S.,et al."The sensitivity of snow ephemerality to warming climate across an arid to montane vegetation gradient".ECOHYDROLOGY 12.2(2019).