c4be7eca-6240-4bfa-8c5c-8ac8a51130e3 Sextant Ifremer ZI Pointe du Diable Plouzane Brittany 29280 France sextant@ifremer.fr https://sextant.ifremer.fr/eng pointOfContact 2025-05-16T00:03:16.735162Z ISO 19115-3 - SEXTANT 1.0 EPSG:4326 MERRA-2 tavgM_2d_aer_Nx: 2d,Monthly mean,Time-averaged,Single-Level,Assimilation,Aerosol Diagnostics V5.12.4 (M2TMNXAER) 2015-01-01 publication c4be7eca-6240-4bfa-8c5c-8ac8a51130e3 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. National Aeronautics and Space Administration (USA) GES DISC Help Desk NASA gsfc-dl-help-disc@mail.nasa.gov publisher Global Modeling and Assimilation Office author https://sextant.ifremer.fr/geonetwork/srv/api/records/c4be7eca-6240-4bfa-8c5c-8ac8a51130e3/attachments/42.png /Physical Environment/Climatology Thèmes Sextant 2023-03-16 publication geonetwork.thesaurus.local.theme.sextant-theme Meteorological geographical features GEMET - INSPIRE themes, version 1.0 2018-07-27T14:39:48 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Canary Current system Atlantic Ocean Mission Atlantic - Case Studies 2023-03-16 publication geonetwork.thesaurus.local.theme.mission-atlantic-case-studies /Atmosphere/Meteorology Mission Atlantic - BODC Parameters 2023-03-16 publication geonetwork.thesaurus.local.theme.mission-atlantic-bodc-parameters Environmental data Mission Atlantic - Data type (DMP) 2023-03-16 publication geonetwork.thesaurus.local.theme.mission-atlantic-data-type WP5 Assessing state, drivers and tipping points Mission Atlantic - Work Package 2023-03-16 publication geonetwork.thesaurus.local.theme.mission-atlantic-work-package Data Mission Atlantic - Resources 2023-03-16 publication geonetwork.thesaurus.local.theme.mission-atlantic-resources Open Licence grid 0.5 utf8 oceans -180.00 180.00 -90.00 90.00 1980-01-01 NetCDF https://goldsmr4.gesdisc.eosdis.nasa.gov/data/MERRA2_MONTHLY/M2TMNXAER.5.12.4/ WWW:LINK Archives https://disc.gsfc.nasa.gov/datasets/M2TMNXAER_5.12.4/summary WWW:LINK GES DISC Access data 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.