NLDAS Homepage


The NLDAS telecon presentations can be found at NCEP ldas ftp site

NEW RELEASE: the LDAS overview paper can be downloaded from JMR website LDAS Overview. 30-year retrospective (1979-2008) NLDAS forcing and outputs of four models and real-time updates (2009-present) are at the NCEP ldas ftp site.
River routed hourly data from four NLDAS models can be downloaded from the link Streamflow, and post-processed SAC soil moisture data can be downloaded from the link Post-Processed SAC Soil Moisture. NLDAS became NCEP Operational on 5 August 2014 and the Operational Products can be downloaded from the link Products. EMC NLDAS-2 realtime and retrospective products are back online through a newly rebuild sever. Contents of data and products included at NCEP ldas ftp site can see this README file.

North American Land Data Assimilation System (NLDAS)

North American Land Data Assimilation (NLDAS) is being developed that will lead to more accurate reanalysis and forecast simulations by numerical weather prediction (NWP) models. Specifically, this system will reduce the errors in the stores of soil moisture and energy which are often present in NWP models and which degrade the accuracy of forecasts. NLDAS is currently running retrospectively and in near real-time on a 1/8th-degree grid resolution. The system is currently forced by terrestrial (NLDAS) precipitation data, space-based radiation data and numerical model output. In order to create an optimal scheme, the projects involve several LSMs, many sources of data, and several institutions. Data from the project can be accessed on the NLDAS forcing pages, the NLDAS model output pages, as well as on the NLDAS Realtime Image Generator page. This is an official NLDAS website which includes NLDAS overview, land surface characteristics parameters, forcing data, land models, model output, publications, useful links, and NLDAS drought monitor.
This webpage originally developed and constructed by Brian Cosgrove, Matthew Rodell, and Charles Alonge for NASA GFSC. It was transitioned to NOAA/NCEP/EMC in June 2008. Now this web is maintained and updated by Michael Ek and Youlong Xia for NLDAS Project.

Find out: Who we are!

NOAA webpage NASA webpage Website Maintained at NOAA/NCEP/EMC NLDAS Technical Contact: Youlong Xia,
Responsible Official: Michael Ek,
NCEP webpage
last updated: 12/18/08

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