Earth Data School
About
Full catalog/clms_swi_global_12.5km_10daily_v3
clms_swi_global_12.5km_10daily_v3·dataset

Worldwide soil moisture, every 10 days (Copernicus)

CLMS SWI Global 12.5km 10-daily V3
hydrosphere ESA ESA Copernicus COGNetCDF
In plain English

What it measures. Reports how much moisture is held in the soil at different depths, averaged into 10-day snapshots across the whole globe.

How it's made. ESA Copernicus produces it from the ASCAT scatterometer aboard the Metop satellites at 12.5-kilometre resolution, spanning 2007 to the present.

How & where you'd use it. Useful for global drought tracking, agricultural outlooks, and climate research where smoothed 10-day values are preferable to noisy daily ones.

What's measured

CopernicusCLMSSWISoil Water Indexsoil moistureglobal10-daily12.5kmMetopASCAT

Coverage & cadence

  • Time span2006-12-31 → 2025-07-10
  • Spatial extent-180, -90, 180, 90
  • FormatsCOG, NetCDF

What you can do with it

  • Follow rainfall, floods and surface-water extent
  • Track soil moisture and the onset of drought
  • Monitor lakes, rivers and groundwater storage
Official description

Quantifies the moisture condition at various depths in the soil. 10-daily observations are available at global scale in the spatial resolution of 12.5 km and with the temporal extent from 2007 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_swi_global_12.5km_10daily_v3"],   # 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.