This page describes the model data for Phase 1 of the North American Land Data Assimilation System (NLDAS-1). The data are in 1/8th-degree grid spacing and range from 01 Oct 1996 to 31 Dec 2007. The temporal resolution is hourly. The file format is WMO GRIB-1.

The LSMs used in NLDAS-1 were: Mosaic, Noah, SAC, and VIC.  However, the NLDAS-1 model datasets are no longer available to the public.

NLDAS validation from NLDAS Phase 1 is available from NOAA/NCEP/EMC.

NLDAS Phase 1 model validation information can be found in Robock et al. (2003).