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Full catalog/clms_sce_northernhemisphere_1km_daily_v1
clms_sce_northernhemisphere_1km_daily_v1·dataset

Daily snow cover map of the Northern Hemisphere (Copernicus)

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

What it measures. Maps the percentage of snow cover on the ground across the Northern Hemisphere, from 0 to 100 percent per pixel, including forested areas.

How it's made. ESA Copernicus generates it daily in near real time from the VIIRS instrument aboard the Suomi-NPP satellite, at about 1-kilometre detail.

How & where you'd use it. Supports winter weather services, avalanche and flood awareness, and long-term studies of how snow seasons are changing.

What's measured

CopernicusCLMSSCESnow Cover ExtentcryosphereNorthern Hemispheredaily1kmSNPPVIIRS

Coverage & cadence

  • Time span2018-01-09 → ongoing
  • Spatial extent-179.9999999, 25, 179.9999999, 84
  • 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 for Northern Hemisphere daily maps of the fraction of snow cover on 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 and with the temporal extent from 2018 to present.

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_northernhemisphere_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.