Brief communication: Evaluation of the snow cover detection in the Copernicus High Resolution Snow & Ice Monitoring Service

Barrou Dumont, Zacharie ; Gascoin, Simon ; Hagolle, Olivier ; Ablain, Michaël ; Jugier, Rémi ; Salgues, Germain ; Marti, Florence ; Dupuis, Aurore ; Dumont, Marie ; Morin, Samuel

Année de publication
2021
Résumé
<p align=justify>The High Resolution Snow & Ice Monitoring Service was launched in 2020 to provide near-real-time, pan-European snow and ice information at 20 m resolution from Sentinel-2 observations. Here we present an evaluation of the snow detection using a database of snow depth observations from 1764 stations across Europe over the hydrological year 2016-2017. We find a good agreement between both datasets with an accuracy (proportion of correct classifications) of 94 % and kappa of 0.81. More accurate (+6 % kappa) retrievals are obtained by excluding low-quality pixels at the cost of a reduced coverage (−13 % data).</p>
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