MERRA-2 tavgM_2d_aer_Nx: 2d,Monthly mean,Time-averaged,Single-Level,Assimilation,Aerosol Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TMNXAER) at GES DISC

Description

M2TMNXAER (or tavgM_2d_aer_Nx) is a time-averaged 2-dimensional monthly mean data collection in Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2). This collection consists of assimilated aerosol diagnostics, such as column mass density of aerosol components (black carbon, dust, sea salt, sulfate, and organic carbon), surface mass concentration of aerosol components, and total extinction (and scattering ) aerosol optical thickness (AOT) at 550 nm. The total PM1.0, PM2.5, and PM10 may be derived with the formula described in the FAQs under the Documentation tab of this page. The collection also includes variance of certain parameters. MERRA-2 is the latest version of global atmospheric reanalysis for the satellite era produced by 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 the latency of ~3 weeks after the end of a 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 file. MERRA-2 Mailing List: Sign up to receive information on reprocessing of data, changing of 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 "MERRA-2 File Specification Document", “MERRA-2 Data Access – Quick Start Guide”, and FAQs linked from the ”Documentation” tab on this page. If that does 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 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/M2TMNXAER_5.12.4.html
21 Access the data via HTTPS. https://goldsmr4.gesdisc.eosdis.nasa.gov/data/MERRA2_MONTHLY/M2TMNXAER.5.12.4/
21 Use the Earthdata Search to find and retrieve data sets across multiple data centers. https://search.earthdata.nasa.gov/search?q=M2TMNXAER
21 The GrADS Data Server (GDS) is another form of OPeNDAP that provides subsetting and some analysis services across the Internet. https://goldsmr4.gesdisc.eosdis.nasa.gov/dods/M2TMNXAER.info
21 Access the data via the OPeNDAP protocol. https://goldsmr4.gesdisc.eosdis.nasa.gov/opendap/MERRA2_MONTHLY/M2TMNXAER.5.12.4/contents.html
33 README Document https://goldsmr4.gesdisc.eosdis.nasa.gov/data/MERRA2_MONTHLY/M2TMNXAER.5.12.4/doc/MERRA2.README.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
21 Time aggregated THREDDS Data Server (TDS) https://goldsmr4.gesdisc.eosdis.nasa.gov/thredds/catalog/MERRA2_MONTHLY_aggregation/catalog.html?dataset=merra2_monthly_aggregation%2FM2TMNXAER.5.12.4_Aggregation.ncml
34 M2TMNXAER variable https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/M2TMNXAER_5.12.4.png
21 How to read and plot the data. https://disc.gsfc.nasa.gov/information/howto?tags=MERRA
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FFH9A0MLJPC7N
21 The GMAO MERRA-2 documentation and FAQs https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/docs/
33 MERRA-2 File Specification Document https://gmao.gsfc.nasa.gov/pubs/docs/Bosilovich785.pdf
21 The GES-DISC Interactive Online Visualization ANd aNalysis Interface (Giovanni) is a web-based tool that allows users to interactively visualize and analyze data. https://giovanni.gsfc.nasa.gov/giovanni/#dataKeyword=M2TMNXAER

Tags

  • aerosols
  • atmosphere
  • atmospheric-chemistry
  • air-quality
  • earth-science

Topics

Categories