NLDAS Homepage


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

NEW RELEASE: NLDAS-2 Noah code package is released and can be downloaded from the link Noah2.8, distributed river routing code and 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; also, see the NLDAS-2 transition Plan. "EMC NLDAS-2 realtime products are back online through a newly rebuild sever. EMC NLDAS team will stage retrospective NLDAS-2 products to the same sever as soon as possible. We will give a further notice if all products are uploaded."

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.

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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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