Monitoring Wet Snow Over an Alpine Region Using Sentinel-1 Observations

The main objective of this study was to monitor wet snow conditions from Sentinel-1 over a season, examine its variation time by cross-checking with independent and weather estimates, distribution taking into account terrain characteristics such as elevation, orientation, slope. One our motivations derive useful representations daily or seasonal changes that would help easily identify elevations determine melt-out days in an area interest. In work, well-known approach the literature is used estimate extent cover continuously season analysis influence complex mountain topography on proposed altitude, slope, aspect terrain. product compared Sentinel-2 products for cloud free scenes. We show while there are good agreements between two satellite products, differences exist, especially areas forests glaciers where underestimated. This underestimation must be considered alongside geometric distortion were excluded study. analysed retrievals at scale examining Altitude–Orientation diagrams different classes slopes also Altitude–Time orientations. have shown type representation very get overview it allows lines For orientation interest, can track evolution locate altitudes dates loss. ascending/descending image series complementary French alpine highlight altitude ranges days. Links been made responses (wet snow) snow/meteorological events carefully listed entire 2017–2018 season.