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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    NLDAS Secondary Forcing Data L4 Hourly 0.125 x 0.125 degree V2.0 (NLDAS_FORB0125_H) at GES DISC

    Metadata Updated: February 22, 2025

    This data set contains the secondary forcing hourly data "File B" for Phase 2 of the North American Land Data Assimilation System (NLDAS-2). The data are in 1/8th degree grid spacing and range from Jan 1979 to the present. The temporal resolution is hourly. The file format isnetCDF (converted from the GRIB data files).

    The non-precipitation land surface forcing fields for NLDAS-2 are derived from the analysis fields of the NCEP North American Regional Reanalysis (NARR). NARR analysis fields are 32-km spatial resolution and 3-hourly temporal frequency. Those NARR fields that are utilized to generate NLDAS-2 forcing fields are spatially interpolated to the finer resolution of the NLDAS 1/8th-degree grid and then temporally disaggregated to the NLDAS hourly frequency. NLDAS-2 is providing a second forcing file, "File B", in which the surface temperature, humidity, and wind fields are represented not at 2-meters and 10-meters above the height of the NLDAS terrain, but rather at the same height above the NLDAS terrain as the height above the NARR terrain of the lowest prognostic level of the NARR assimilation system (namely, the same height above the model terrain as the lowest prognostic level of the mesoscale Eta model, which is the assimilating model in NARR).

    The surface downward surface radiation field in "File B" is taken directly from NARR, without any bias correction. The precipitation and convective precipitation fields in "File B" are also taken directly from NARR, and are used to calculate the convective fraction provided in "File A". The aerodynamic conductance is "File B" is also taken from NARR.

    The hourly land surface forcing fields for NLDAS-2 are grouped into two files, "File A" and "File B". "File B" is the secondary (optional) forcing file and contains ten meteorological forcing fields. Details about the generation of the NLDAS-2 forcing datasets can be found in Xia et al. (2012).

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    References

    https://doi.org/10.1029/2011JD016048
    https://doi.org/10.1029/2011JD016051
    https://doi.org/10.1029/2002JD003118
    https://doi.org/10.1175/1520-0450(1984)023%3C0222%3ATIOASO%3E2.0.CO%3B2
    https://doi.org/10.1029/2002JD003301

    Dates

    Metadata Created Date February 22, 2025
    Metadata Updated Date February 22, 2025

    Metadata Source

    Harvested from nasa test json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date February 22, 2025
    Metadata Updated Date February 22, 2025
    Publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
    Maintainer
    Identifier C2033167496-GES_DISC
    Data First Published 2021-04-11
    Language en-US
    Data Last Modified 2025-02-19
    Category NLDAS, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 94d8c2c0-b4ea-4c84-81e8-151915704942
    Harvest Source Id a73e0c30-4684-40ef-908e-d22e9e9e5f86
    Harvest Source Title nasa test json
    Homepage URL https://doi.org/10.5067/96S0R3LFOBTU
    Metadata Type geospatial
    Old Spatial -125.0 25.0 -67.0 53.0
    Program Code 026:001
    Related Documents https://doi.org/10.1029/2011JD016048, https://doi.org/10.1029/2011JD016051, https://doi.org/10.1029/2002JD003118, https://doi.org/10.1175/1520-0450(1984)023%3C0222%3ATIOASO%3E2.0.CO%3B2, https://doi.org/10.1029/2002JD003301
    Source Datajson Identifier True
    Source Hash 70ef6ddba5d11ead98f1ab421abba9c99f889756683fbe853c9f5c60367914eb
    Source Schema Version 1.1
    Spatial
    Temporal 1979-01-01T13:00:00Z/2023-02-28T00:00:00Z

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