Assessment of MERRA-2 and ERA5 to Model the Snow Water Equivalent in the High Atlas (1981-2019)

被引：16

作者：

Baba, Mohamed Wassim ^{[1
]}

Boudhar, Abdelghani ^{[1
,2
]}

Gascoin, Simon ^{[3
]}

Hanich, Lahoucine ^{[1
,4
]}

Marchane, Ahmed ^{[1
]}

Chehbouni, Abdelghani ^{[1
,3
]}

机构：

[1] Mohammed VI Polytech Univ UM6P, Ctr Remote Sensing Applicat CRSA, Ben Guerir 43150, Morocco

[2] Sultan Moulay Slimane Univ, Fac Sci & Tech, Water Resources Management & Valorizat & Remote S, Beni Mellal 23000, Morocco

[3] Univ Toulouse, CESBIO, CNES CNRS IRD INRA UPS, F-31400 Toulouse, France

[4] Univ Cadi Ayyad, Dept Sci Terre, Lab Geosci Geoenvironm & Genie Civil, Fac Sci & Tech Gueliz, Av A Khattabi,BP 549, Marrakech 40000, Morocco

来源：

WATER | 2021年 / 13卷 / 07期

关键词：

snow cover; snow water equivalent; Morocco; MERRA-2; ERA5;

D O I：

10.3390/w13070890

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Melt water runoff from seasonal snow in the High Atlas range is an essential water resource in Morocco. However, there are only few meteorological stations in the high elevation areas and therefore it is challenging to estimate the distribution of snow water equivalent (SWE) based only on in situ measurements. In this work we assessed the performance of ERA5 and MERRA-2 climate reanalysis to compute the spatial distribution of SWE in the High Atlas. We forced a distributed snowpack evolution model (SnowModel) with downscaled ERA5 and MERRA-2 data at 200 m spatial resolution. The model was run over the period 1981 to 2019 (37 water years). Model outputs were assessed using observations of river discharge, snow height and MODIS snow-covered area. The results show a good performance for both MERRA-2 and ERA5 in terms of reproducing the snowpack state for the majority of water years, with a lower bias using ERA5 forcing.

引用

页数：14

共 52 条

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