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Full catalog/clms_sce_global_1km_daily_v1
clms_sce_global_1km_daily_v1·dataset

Daily worldwide snow cover map (Copernicus)

CLMS SCE Global 1km daily V1
cryosphere ESA ESA Copernicus active COGNetCDF
In plain English

What it measures. Shows the fraction of each roughly 1-kilometre pixel covered by snow worldwide, from 0 to 100 percent, including snow beneath forests.

How it's made. ESA Copernicus produces it daily in near real time using the SLSTR sensors on the Sentinel-3A and Sentinel-3B satellites together with the US NOAA-20 satellite.

How & where you'd use it. Useful for global snow monitoring, climate tracking, and feeding hydrological models that estimate seasonal water availability.

What's measured

CopernicusCLMSSCESnow Cover Extentcryosphereglobaldaily1kmSentinel-3ASentinel-3BSLSTRNOAA-20VIIRS

Coverage & cadence

  • Time span2025-12-01 → ongoing
  • Spatial extent-180, -90, 180, 90
  • FormatsCOG, NetCDF

What you can do with it

  • Measure sea ice, snow cover and glaciers
  • Watch ice-sheet elevation change
  • Track freeze/thaw and permafrost
Official description

Provides daily global maps of the fraction of snow cover on the ground (also in forested areas) per pixel in percentage (0% to 100%). The data is available in near real time with a pixel spacing of about 1 km.

Get the data

copernicus_access.py
# ESA Copernicus Data Space — open STAC API (free account)
from pystac_client import Client

cat = Client.open("https://stac.dataspace.copernicus.eu/v1")
search = cat.search(
    collections=["clms_sce_global_1km_daily_v1"],   # add _cog or _nc for a format variant
    bbox=(-10, 35, 30, 60),             # your area (W,S,E,N)
    datetime="2024-01-01/2024-12-31",
)
items = list(search.items())            # then read assets with rioxarray / xarray
Browsing the Copernicus STAC is open; downloading bytes needs a free Copernicus Data Space account.