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    • MERRA-2 tavgC_3d_ltm_Np: 3d, Long Term Mean 3-Dimensional Meteorological Fields based on 1991-2020 V2 (M2TCNPLTM) at GES DISC

    Metadata Updated: December 6, 2023

    M2TCNPLTM (or tavgC_3d_ltm_Np) is a 3-dimensional monthly data collection for climatological long term mean and standard deviation representing the interannual variability on a monthly timescale, derived from monthly Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2) datasets. V2 of this data collection is calculated with data from January 1991 to December 2020. In contrast, V1, the original version, is computed with data from an earlier 30-year time of 1981-2010.

    This collection consists of meteorological diagnostics at 12 vertical pressure levels (e.g.,850 hPa, 500hPa, and 200 hPa), such as air temperature, wind components, and both relative and specific humidity.

    MERRA-2 is the latest version of global atmospheric reanalysis for the satellite era produced by the NASA Global Modeling and Assimilation Office (GMAO) using the Goddard Earth Observing System Model (GEOS) version 5.12.4. The dataset covers the period of 1980-present, with a latency of ~3 weeks after the end of the previous month.

    Data Reprocessing: Please check “Records of MERRA-2 Data Reprocessing and Service Changes”, linked from the “Documentation” tab on this page. Note that a reprocessed data filename is different from the original filename.

    MERRA-2 Mailing List: Sign up to receive information on reprocessing of data, changes to tools and services, as well as data announcements from GMAO. Contact the GES DISC Help Desk (gsfc-dl-help-disc@mail.nasa.gov) to be added to the list.

    Questions: If you have a question, please read the "MERRA-2 File Specification Document'', “MERRA-2 Data Access – Quick Start Guide”, and FAQs linked from the ”Documentation” tab on this page for more information. If these documents do not answer your question, you may email the question on data access to the GES DISC Help Desk (gsfc-dl-help-disc@mail.nasa.gov), or the question on science to the MERRA-2 science team (merra-questions@lists.nasa.gov)

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    References

    https://doi.org/10.1175/JCLI-D-16-0758.1

    Dates

    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    M2TCNPLTM sample image: Monthly climatology of relative humidity after moist (RH) at 700hPa, Jan. The base period of the climatology is 1991-2020.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 30, 2023
    Metadata Updated Date December 6, 2023
    Publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
    Maintainer
    Identifier C2531964023-GES_DISC
    Data First Published 2022-11-01
    Language en-US
    Data Last Modified 2022-11-01
    Category MERRA-2, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Global Modeling and Assimilation Office (GMAO). 2022-11-08. M2TCNPLTM. Version 2. MERRA-2 tavgC_3d_ltm_Np: 3d, Long Term Mean 3-Dimensional Meteorological Fields based on 1991-2020 V2. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://doi.org/10.5067/QTDN06JJU27T. https://disc.gsfc.nasa.gov/datacollection/M2TCNPLTM_2.html. Digital Science Data.
    Creator Global Modeling and Assimilation Office (GMAO)
    Data Presentation Form Digital Science Data
    Graphic Preview Description M2TCNPLTM sample image: Monthly climatology of relative humidity after moist (RH) at 700hPa, Jan. The base period of the climatology is 1991-2020.
    Graphic Preview File https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/M2TCNPLTM_2.png
    Harvest Object Id 643f56fc-25b9-45a2-b5ca-fc50f0749b01
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/QTDN06JJU27T
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Related Documents https://doi.org/10.1175/JCLI-D-16-0758.1
    Release Place Greenbelt, MD, USA
    Series Name M2TCNPLTM
    Source Datajson Identifier True
    Source Hash 5b988b20c87f8cee805ed08e42f9d98bf3944d50dc885e802364a5fe904bd403
    Source Schema Version 1.1
    Spatial
    Temporal 1991-01-01T00:00:00Z/2020-12-31T23:59:59.999Z

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