MERRA-2 tavgC_2d_ltm_Nx: 2d, Single-Level, Long Term Mean Diagnostics based on 1991-2020 V2 (M2TCNXLTM) at GES DISC

Description

M2TCNXLTM (or tavgC_2d_ltm_Nx) is a 2-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, such as air temperature (maximum, mean, and minimum at 2-meter), wind components at different vertical levels (2-meter, 10-meter, 50-meter, 850 hPa, 500hPa, and 250 hPa), sea level pressure, surface pressure, and total precipitation, evaporation, and total precipitable water vapor. 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)

Resources

Name Format Description Link
21 Documents with exmaple on how to read and plot MERRA-2 data. https://disc.gsfc.nasa.gov/information/howto?tags=MERRA
34 M2TCNXLTM sample image: Monthly climatology of total precipitation (PRECTOT) for Jan. The base period of the climatology is 1991-2020. https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/M2TCNXLTM_2.png
21 Access the data via HTTPS. https://goldsmr4.gesdisc.eosdis.nasa.gov/data/MERRA2_CLIM/M2TCNXLTM.2/
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2F5P9JKV0EB46M
21 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/M2TCNXLTM_2.html
21 Access the data via the OPeNDAP protocol. https://goldsmr4.gesdisc.eosdis.nasa.gov/opendap/MERRA2_CLIM/M2TCNXLTM.2/contents.html
21 The NASA GMAO MERRA-2 Data Documentation and FAQs https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/docs/
33 README Document https://goldsmr4.gesdisc.eosdis.nasa.gov/data/MERRA2_CLIM/M2TCNXLTM.2/doc/README_MERRA2_CLIMSTAT_V2.pdf
21 MERRA-2 Data Access – Quick Start Guide https://disc.gsfc.nasa.gov/information/documents?title=MERRA-2+Data+Access+%E2%80%93+Quick+Guide
21 Records of MERRA-2 Data Reprocessing and Service Changes https://disc.gsfc.nasa.gov/information/documents?title=Records+of+MERRA-2+Data+Reprocessing+and+Service+Changes
21 FAQs about MERRA-2 data access https://disc.gsfc.nasa.gov/information/faqs?keywords=MERRA-2&page=1
33 File Specification Document https://gmao.gsfc.nasa.gov/pubs/docs/Collow1437.pdf
21 Use the Earthdata Search to find and retrieve data sets across multiple data centers. https://search.earthdata.nasa.gov/search?q=M2TCNXLTM_2

Tags

  • precipitation
  • atmosphere
  • atmospheric-temperature
  • earth-science

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