NLDAS-2: North American Land Data Assimilation System Forcing Fields (NASA/NLDAS/FORA0125_H002)
Land Data Assimilation System (LDAS) combines multiple sources of observations (such as precipitation gauge data, satellite data, and radar precipitation measurements) to produce estimates of climatological properties at or near the Earth’s surface.
This dataset is the primary (default) forcing file (File A) for Phase 2 of the North American Land Data Assimilation System (NLDAS-2). The data are in 1/8th-degree grid spacing; the temporal resolution is hourly.
NLDAS is a collaboration project among several groups: NOAA/NCEP’s Environmental Modeling Center (EMC), NASA’s Goddard Space Flight Center (GSFC), Princeton University, the University of Washington, the NOAA/NWS Office of Hydrological Development (OHD), and the NOAA/NCEP Climate Prediction Center (CPC). NLDAS is a core project with support from NOAA’s Climate Prediction Program for the Americas (CPPA).
| Name | Description | Gee:unit |
|---|---|---|
| temperature | Air temperature at 2 meters above the surface | °C |
| specific_humidity | Specific humidity at 2 meters above the surface | kg/kg |
| pressure | Surface pressure | Pa |
| wind_u | U wind component at 10 meters above the surface | m/s |
| wind_v | V wind component at 10 meters above the surface | m/s |
| longwave_radiation | Surface downward longwave radiation | W/m^2 |
| convective_fraction | Fraction of total precipitation that is convective: from NARR | |
| potential_energy | Convective available potential energy (J/kg): from NARR | J/kg |
| potential_evaporation | Potential evaporation: from NARR | kg/m^2 |
| total_precipitation | Hourly total precipitation | kg/m^2 |
| shortwave_radiation | Surface downward shortwave radiation - bias corrected | W/m^2 |
Providers | |
|---|---|
| NASA (producer, licensor) | |
| Google Earth Engine (host) | |
| STAC Version | 0.6.2 |
| Keywords | climate, evaporation, forcing, geophysical, hourly, humidity, ldas, nasa, nldas, precipitation, pressure, radiation, temperature, wind |
| License | proprietary |
| Temporal Extent | 12/31/1978, 4:00:00 PM - now |
| Citation | The data set source should be properly cited when the data are used. A formal reference of the form: <authors>, 2012, last updated 2013: <dataset name>. NASA/GSFC, Greenbelt, MD, USA, NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). Accessed <enter user data access date> at <DOI> is suggested following Parsons et al. (2010), DOI: https://doi.org/10.1029/2010EO340001. |
| Type | image_collection |
| GSD | arc degreesm |
| Cadence | hour |
| cube:dimensions | {"x":{"type":"spatial","axis":"x","extent":[-125.15,-66.85]},"y":{"type":"spatial","axis":"y","extent":[24.85,53.28]},"temporal":{"type":"temporal","extent":["1979-01-01T00:00:00Z",null]},"bands":{"type":"bands","values":["temperature","specific_humidity","pressure","wind_u","wind_v","longwave_radiation","convective_fraction","potential_energy","potential_evaporation","total_precipitation","shortwave_radiation"]}} |