NLDAS: North American Land Data Assimilation System

Teaser image
NLDAS: North American Land Data Assimilation System
Main content

The goal of the North American Land Data Assimilation System (NLDAS) is to construct quality-controlled, and spatially and temporally consistent, land-surface model (LSM) datasets from the best available observations and model output to support modeling activities. Data sets are available on hourly, daily, monthly and climatological time scales. NLDAS products are used in modeling, research, and applications, such as drought and flood monitoring, watershed and water quality management, and case studies of extreme events.

There are two phases referred to as NLDAS-1 and NLDAS-2. The latter spans January 1979-present. "NLDAS (Mitchell et al., 2004; Xia et al., 2012) integrates a large quantity of observation based and model reanalysis data to drive offline (not coupled to the atmosphere) land surface models (LSMs), and executes at 1/8th-degree grid spacing over central North America."

Please cite data sources, following the data providers' instructions
Suggested Data Citation
None
Dataset DOIs
None
Hosted Climate Index Files
None
Usage Restrictions
None

Key Figures

Climate Data Guide Image: NLDAS

NLDAS July 1980-2009 climatology: Total Precipitation and Potential Evaporartion. (Climate Data Guide; D. Shea)

Climate Data Guide Image: NLDAS

NLDAS July 1980-2009 climatology: Total Convection Precipitation and Convective Available Potential Energy (CAPE). (Climate Data Guide; D. Shea)

Climate Data Guide Image: NLDAS

NLDAS July 1980-2009 climatology: Temperature and Specific Humidity. (Climate Data Guide; D. Shea)

Climate Data Guide Image: NLDAS

NLDAS July 1980-2009 climatology: Zonal (U) and Meridional Wind Components. (Climate Data Guide; D. Shea)

Climate Data Guide Image: NLDAS

NLDAS July 1980-2009 climatology: Downward Shortwave and Longwave Radiation. (Climate Data Guide; D. Shea)

Climate Data Guide Image: NLDAS

NLDAS July 1980-2009 climatology: Surface Pressure. (Climate Data Guide; D. Shea)

Climate Data Guide Image: NLDAS

NLDAS July 1980-2009 climatology: Wind direction and magnitude. (Climate Data Guide; D. Shea)

Other Information

Type of data product
None
Dataset collections
None

Years of record
to
Data time period extended
Yes, data set is extended
Timestep
Climatology, Sub-daily, Monthly
Formats:
Input Data

observations & model

Vertical Levels:
Missing Data Flag
None
Ocean or Land
Land Only
Spatial Resolution

0.125 (224x464)

Model Resolution (reanalysis)
None
Data Assimilation Method
None
Model Vintage (reanalysis)
None