Data Sources


The Climate Research Unit at the University of East Anglia in England is a leading climate research group that also provides climate data.

Source: thousands of monthly temperature stations over land and marine waters

SNAP uses: CRU TS and CL high resolution (0.5° x 0.5°) gridded data



Research groups worldwide develop General Circulation Models (GCMs), which are used in periodic climate assessment reports published the United Nations IPCC. GCM outputs help form the basis for many interpretations of future climate. The IPCC Fifth Assessment Report (AR5) was published in January 2014.

Source: Lawrence Livermore National Laboratory Program for Climate Model Diagnosis and Intercomparison data portal

SNAP uses:‚Äč


PRISM data are some of the highest resolution spatial climate data currently available across large extents.

We use PRISM data as the baseline climatology in our delta downscaled products.

Sources: temperature and precipitation data from the North and other regions

SNAP uses:

  • temperature and precipitation data from the 30-year (1961–1990) monthly climatology at 2 km spatial resolution covering Alaska and regions of Canada
  • 771 m spatial resolution from 1971–2000 covering only Alaska
  • other PRISM datasets such as the Pacific Islands for specific projects