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DOI	10.1016/j.jhydrol.2020.125657
	Dynamics of seasonal snowpack over the High Atlas
	Tuel, Alexandre; Chehbouni, Abdelghani; Eltahir, Elfatih A. B.
通讯作者	Tuel, A (corresponding author), MIT, Ralph M Parsons Lab, Cambridge, MA 02139 USA.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	595
英文摘要	Snowpack melting in the High Atlas constitutes the major source of freshwater for the semi-arid agricultural plains of central Morocco. Snow runoff fills dams during spring and recharges groundwater, thus providing the necessary water for irrigation and hydropower production. Despite its critical importance for the region, basic questions about the High Atlas snowpack remain largely unanswered. In particular, the spatial and temporal distribution of snow water equivalent, as well as sublimation losses, potentially significant in this region, have yet to be thoroughly investigated. The scarcity of ground data has been a major obstacle to investigating snow processes in the High Atlas. Here, we demonstrate the potential of remotely-sensed meteorological variables and downscaled climate reanalysis data to gain important insights into snow water balance in a semi-arid region. We apply a distributed energy balance snow model based on SNOW17, constrained by topographic data, meteorological data from satellites and high-resolution dynamically-downscaled ERA-Interim data, to simulate snowpack dynamics within the Oum-Er-Rbia watershed, at the heart of Morocco's High Atlas. The simulations are compared to MODIS snow cover maps and observed snow depth at one field station. Results show that the spatial extent and temporal dynamics of snow cover at various elevation ranges are accurately captured. The snowpack is essentially concentrated above 2500 m, extends over 500-6000 km(2) and holds 0.05-0.4 km(3) at its peak in early February. Additionally, we find that losses by sublimation range from 0.06 to 0.14 km(3) for an average of 0.09 km(3) a year, about 10% of all snowfall. Above 3000 m elevation, sublimation removes on average 20% of the snowpack. Finally, we discuss the sensitivity of our results to uncertainties in the forcing meteorological data. This study reveals the essential components of the snow water balance in the High Atlas and paves the way for better understanding of its sensitivity to climate change.
英文关键词	Empirical snow model SNOW17 SWE Morocco Sublimation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000641592600006
WOS关键词	LAND-SURFACE TEMPERATURE ; WATER EQUIVALENT ; AIR-TEMPERATURE ; SNOWMELT MODEL ; COVER DATA ; PRECIPITATION ; INDEX ; MOUNTAINS ; SCALE ; SUBLIMATION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350887
作者单位	[Tuel, Alexandre; Eltahir, Elfatih A. B.] MIT, Ralph M Parsons Lab, Cambridge, MA 02139 USA; [Chehbouni, Abdelghani] Univ Mohamed VI Polyt, InternationalWater Res Inst, Benguerir, Morocco; [Chehbouni, Abdelghani] CESBIO CNES CNRS IRD INRAE UPS, Toulouse, France
推荐引用方式 GB/T 7714	Tuel, Alexandre,Chehbouni, Abdelghani,Eltahir, Elfatih A. B.. Dynamics of seasonal snowpack over the High Atlas[J],2021,595.
APA	Tuel, Alexandre,Chehbouni, Abdelghani,&Eltahir, Elfatih A. B..(2021).Dynamics of seasonal snowpack over the High Atlas.JOURNAL OF HYDROLOGY,595.
MLA	Tuel, Alexandre,et al."Dynamics of seasonal snowpack over the High Atlas".JOURNAL OF HYDROLOGY 595(2021).