EO Atlas
About
Datasets/SPL4SMAU
d034·dataset

Soil moisture, root-zone & modeled

SMAP L4 Surface and Root-Zone Soil Moisture (Model-Assimilated)
NSIDC DAAC SPL4SMAU cloud-native 9 km 3-hourly + daily averages HDF5 hydrologyagriculturedroughtmodel-assimilated

Root-zone (0-1 m) soil moisture from a land-surface model assimilating SMAP L3 brightness temperatures. Used in NASA Agricultural Drought Monitor + crop-yield forecasting.

SMAP L4 Surface and Root-Zone Soil Moisture (Model-Assimilated)

Root-zone (0-1 m) soil moisture from a land-surface model assimilating SMAP L3 brightness temperatures. Used in NASA Agricultural Drought Monitor + crop-yield forecasting.

Access

Gotchas

  • Model output assimilating SMAP — NOT a direct deep-soil observation
  • Catchment LSM is the underlying model; biases inherit from it
  • Use alongside SPL4CMDL for carbon-flux estimates
  • Other datasets: d033

Sources

The access details, code, and sources below are kept in the original English for technical accuracy.

Quick access (cloud-direct)

spl4smau_access.py
import earthaccess
earthaccess.login(strategy="netrc")

results = earthaccess.search_data(
    short_name="SPL4SMAU",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),
    temporal=("2024-01-01", "2024-12-31"),
)
files = earthaccess.open(results)   # stream from NSIDC DAAC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.

📚 Problem Finder KB

Not yet tracked in the KB.