Archived Data Sets
NOHRSC products are archived at
This data set contains output from the NOAA National Weather Service's National
Operational Hydrologic Remote Sensing Center (NOHRSC) SNOw Data Assimilation
System (SNODAS), beginning 1 October 2003. SNODAS is a modelling and data
assimilation system developed by the NOHRSC to provide the best possible
estimates of snow cover and associated variables to support hydrologic
modelling and analysis. The aim of SNODAS is to provide a physically
consistent framework to integrate snow data from satellite and airborne
platforms, and ground stations with model estimates of snow cover (Carroll
et al. 2001). SNODAS includes procedures to ingest and downscale output from
Numerical Weather Prediction (NWP) models; a physically based,
spatially-distributed energy- and mass-balance snow model; and procedures to
assimilate satellite-derived, airborne and ground-based observations of snow
covered area and snow water equivalent. The NOHRSC products available from
NSIDC are gridded data sets for the continential United States at 1-km spatial
resolution and 24-hour temporal resolution.
SNODAS is run each day, with analysts deciding whether or not to use remote
sensing and ground based observations to update the snow water equivalent state
in the model.
Data Citation
National Operational Hydrologic Remote Sensing Center. 2004. Snow Data Assimilation System (SNODAS) data products at NSIDC. Boulder, CO: National Snow and Ice Data Center. Digital media.
NSIDC's SNODAS page
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