High-Resolution Snow & Ice Monitoring

Table of contents

• Fractional Snow Cover
• Daily cumulative Gap-filled Fractional Snow Cover
• SAR Wet Snow in high mountains
• Wet / Dry Snow - Snow state classification
• Persistent Snow Area
• RLIE S1
  • Available scripts
• RLIE S2
  • Available scripts
• RLIE S1+S2
  • Available scripts

The High-Resolution Snow & Ice Monitoring service (HR-S&I) is part of the Copernicus Land Monitoring Service (CLMS). The snow aspect of the service provides products measuring Snow cover (FSC, FSTOC, FSCOG, GFSC), Snow state conditions (WDS, SWS) and persistent snow area (PSA). There are also ice products that measure ice cover (RLIE) and aggregated river and lake ice extent (ARLIE).

Fractional Snow Cover

The Fractional Snow Cover (FSC) product provides the snow fraction at the Top Of Canopy (FSCTOC) and On Ground (FSCOG). NDSI is also provided as part of this service.

Available scripts

• FSC FSCOG visualisation script
• FSC FSCOG quality visualisation script
• FSC FSTOC visualisation script
• FSC FSTOC quality visualisation script
• FSC NDSI visualisation script

Daily cumulative Gap-filled Fractional Snow Cover

The daily cumulative Gap-filled Fractional Snow Cover (GFSC) product is a more complete version of the FSC product; gap-filled both at a spatial and temporal scale.

Available scripts

• GFSC FSC visualisation script
• GFSC FSC quality visualisation script

SAR Wet Snow in high mountains

The SAR Wet Snow (SWS) product provides information on the wet snow extent in high-mountain areas.

Available scripts

• SWS WSM visualisation script
• SWS WSM quality visualisation script

Wet / Dry Snow - Snow state classification

The Wet/Dry Snow (WDS) product differentiates the snow state conditions within the snow mask defined by the FSCTOC information.

Available scripts

• WDS SSC visualisation script
• WDS SSC quality visualisation script

Persistent Snow Area

The Persistent Snow Area (PSA) product is generated annually from FSC products and provides the extent of persistent snow cover for that year (the area where snow is present throughout the hydrological year).

Available scripts

• PSA visualisation script
• PSA quality visualisation script

RLIE S1

The River and Lake Ice Extent S1 (RLIE S1) product differentiates open water bodies, snow-covered or snow-free ice areas from areas with no data. The product is generated in near-real time based on the revisit time of the Sentinel 1 constellation.

Available scripts

• RLIE S1 visualisation script
• RLIE S1 quality visualisation script

RLIE S2

The River and Lake Ice Extent S2 (RLIE S2) product differentiates open water bodies, snow-covered or snow-free ice areas from other features, cloud cover or cloud shadows and areas with no data. The product is generated in near-real time based on the revisit time of the Sentinel 2 constellation

Available scripts

• RLIE S2 visualisation script
• RLIE S2 quality visualisation script

RLIE S1+S2

The S1 and S2 River and Lake Ice Extent (RLIE S1+S2) product differentiates open water bodies, snow-covered or snow-free ice areas from other features, cloud cover or cloud shadows and areas with no data. The product is generated in delayed-time, resulting from the combination of RLIE S1 and RLIE S2 products.

Available scripts

• RLIE S1+S2 visualisation script
• RLIE S1+S2 quality visualisation script

More information about the HR-S&I snow production workflows that highlights the dependencies between the diferent products and how they are derived can be found here.