[null,null,[],[[["\u003cp\u003eThe NASA/GSFC/MERRA/aer/2 dataset provides hourly time-averaged, 2-dimensional aerosol diagnostics from the MERRA-2 reanalysis.\u003c/p\u003e\n"],["\u003cp\u003eData includes assimilated aerosol components such as black carbon, dust, sea-salt, sulfate, and organic carbon, as well as total aerosol optical thickness (AOT) at 550 nm.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from 1980 to the present with a latency of approximately 3 weeks.\u003c/p\u003e\n"],["\u003cp\u003eMERRA-2 is produced by NASA using the Goddard Earth Observing System Model (GEOS) version 5.12.4.\u003c/p\u003e\n"],["\u003cp\u003eNASA promotes the full and open sharing of this data for research and application purposes.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 1980-01-01T00:00:00Z--2025-08-01T23:00:00Z\n\nDataset Provider\n:\n\n\n [NASA/MERRA](https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/)\n\nCadence\n: 1 Hour\n\nTags\n:\n[aerosol](/earth-engine/datasets/tags/aerosol) [atmosphere](/earth-engine/datasets/tags/atmosphere) [carbon](/earth-engine/datasets/tags/carbon) [dust](/earth-engine/datasets/tags/dust) [mass](/earth-engine/datasets/tags/mass) [merra](/earth-engine/datasets/tags/merra) [nasa](/earth-engine/datasets/tags/nasa) [sea-salt](/earth-engine/datasets/tags/sea-salt) [so2](/earth-engine/datasets/tags/so2) [so4](/earth-engine/datasets/tags/so4) \n\nDescription \nM2T1NXAER (or tavg1_2d_aer_Nx) is an hourly time-averaged 2-dimensional data\ncollection in Modern-Era Retrospective analysis for Research and\nApplications version 2 (MERRA-2). This collection consists of assimilated\naerosol diagnostics, such as column mass density of aerosol components\n(black carbon, dust, sea-salt, sulfate, and organic carbon), surface mass\nconcentration of aerosol components, and total extinction (and scattering)\naerosol optical thickness (AOT) at 550 nm. The total PM1.0, PM2.5, and PM10\nmay be derived with the formula described in the\n[in the FAQ](https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/FAQ/)\n\nThe data field is time-stamped with the\ncentral time of an hour starting from 00:30 UTC,\ne.g.: 00:30, 01:30, ... , 23:30 UTC.\n\nMERRA-2 is the latest version of global atmospheric reanalysis for the\nsatellite era produced by NASA Global Modeling and Assimilation Office\n(GMAO) using the Goddard Earth Observing System Model (GEOS) version 5.12.4.\nThe dataset covers the period of 1980-present with the latency of \\~3 weeks\nafter the end of a month.\n\nBands\n\n\n**Pixel Size**\n\n69375 meters\n\n\n**Y Pixel Size**\n\n55000 meters\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|-------------|---------|------------|--------------------------------------------------|\n| `BCANGSTR` | | meters | Black carbon angstrom parameter \\[470-870 nm\\] |\n| `BCCMASS` | kg/m\\^2 | meters | Black carbon column mass density |\n| `BCEXTTAU` | | meters | Black carbon extinction AOT \\[550 nm\\] |\n| `BCFLUXU` | kg/m/s | meters | Black carbon column u-wind mass flux |\n| `BCFLUXV` | kg/m/s | meters | Black carbon column v-wind mass flux |\n| `BCSCATAU` | | meters | Black carbon scattering AOT \\[550 nm\\] |\n| `BCSMASS` | kg/m\\^3 | meters | Black carbon surface mass concentration |\n| `DMSCMASS` | kg/m\\^2 | meters | Dms column mass density |\n| `DMSSMASS` | kg/m\\^3 | meters | Dms surface mass concentration |\n| `DUANGSTR` | | meters | Dust angstrom parameter \\[470-870 nm\\] |\n| `DUCMASS25` | kg/m\\^2 | meters | Dust column mass density - PM2.5 |\n| `DUCMASS` | kg/m\\^2 | meters | Dust column mass density |\n| `DUEXTT25` | | meters | Dust extinction AOT \\[550 nm\\] - PM2.5 |\n| `DUEXTTAU` | | meters | Dust extinction AOT \\[550 nm\\] |\n| `DUFLUXU` | kg/m/s | meters | Dust column u-wind mass flux |\n| `DUFLUXV` | kg/m/s | meters | Dust column v-wind mass flux |\n| `DUSCAT25` | | meters | Dust scattering AOT \\[550 nm\\] - PM2.5 |\n| `DUSCATAU` | | meters | Dust scattering AOT \\[550 nm\\] |\n| `DUSMASS25` | kg/m\\^3 | meters | Dust surface mass concentration - PM2.5 |\n| `DUSMASS` | kg/m\\^3 | meters | Dust surface mass concentration |\n| `OCANGSTR` | | meters | Organic carbon angstrom parameter \\[470-870 nm\\] |\n| `OCCMASS` | kg/m\\^2 | meters | Organic carbon column mass density |\n| `OCEXTTAU` | | meters | Organic carbon extinction AOT \\[550 nm\\] |\n| `OCFLUXU` | kg/m/s | meters | Organic carbon column u-wind mass flux |\n| `OCFLUXV` | kg/m/s | meters | Organic carbon column v-wind mass flux |\n| `OCSCATAU` | | meters | Organic carbon scattering AOT \\[550 nm\\] |\n| `OCSMASS` | kg/m\\^3 | meters | Organic carbon surface mass concentration |\n| `SO2CMASS` | kg/m\\^2 | meters | So2 column mass density |\n| `SO2SMASS` | kg/m\\^3 | meters | So2 surface mass concentration |\n| `SO4CMASS` | kg/m\\^2 | meters | SO4 column mass density |\n| `SO4SMASS` | kg/m\\^3 | meters | SO4 surface mass concentration |\n| `SSANGSTR` | | meters | Sea salt angstrom parameter \\[470-870 nm\\] |\n| `SSCMASS25` | kg/m\\^2 | meters | Sea salt column mass density - PM2.5 |\n| `SSCMASS` | kg/m\\^2 | meters | Sea salt column mass density |\n| `SSEXTT25` | | meters | Sea salt extinction AOT \\[550 nm\\] - PM2.5 |\n| `SSEXTTAU` | | meters | Sea salt extinction AOT \\[550 nm\\] |\n| `SSFLUXU` | kg/m/s | meters | Sea salt column u-wind mass flux |\n| `SSFLUXV` | kg/m/s | meters | Sea salt column v-wind mass flux |\n| `SSSCAT25` | | meters | Sea salt scattering AOT \\[550 nm\\] - PM2.5 |\n| `SSSCATAU` | | meters | Sea salt scattering AOT \\[550 nm\\] |\n| `SSSMASS25` | kg/m\\^3 | meters | Sea salt surface mass concentration - PM2.5 |\n| `SSSMASS` | kg/m\\^3 | meters | Sea salt surface mass concentration |\n| `SUANGSTR` | | meters | SO4 angstrom parameter \\[470-870 nm\\] |\n| `SUEXTTAU` | | meters | SO4 extinction AOT \\[550 nm\\] |\n| `SUFLUXU` | kg/m/s | meters | SO4 column u-wind mass flux |\n| `SUFLUXV` | kg/m/s | meters | SO4 column v-wind mass flux |\n| `SUSCATAU` | | meters | SO4 scattering AOT \\[550 nm\\] |\n| `TOTANGSTR` | | meters | Total aerosol angstrom parameter \\[470-870 nm\\] |\n| `TOTEXTTAU` | | meters | Total aerosol extinction AOT \\[550 nm\\] |\n| `TOTSCATAU` | | meters | Total aerosol scattering AOT \\[550 nm\\] |\n\nTerms of Use\n\n**Terms of Use**\n\nNASA promotes the full and open sharing of all data with research and\napplications communities, private industry, academia, and the general\npublic.\n\nExplore with Earth Engine **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('NASA/GSFC/MERRA/aer/2')\n .filter(ee.Filter.date('2022-02-01', '2022-02-02'));\nvar black_carbon_column_u_wind_mass_flux = dataset.select('BCFLUXU');\nvar bccVis = {\n min: -0.0000116,\n max: 0.0000165,\n palette: ['001137', '01abab', 'e7eb05', '620500']\n};\nMap.setCenter(-95.62, 39.91, 2);\nMap.addLayer(black_carbon_column_u_wind_mass_flux, bccVis);\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_GSFC_MERRA_aer_2) \n[MERRA-2 M2T1NXAER: Aerosol Diagnostics V5.12.4](/earth-engine/datasets/catalog/NASA_GSFC_MERRA_aer_2) \nM2T1NXAER (or tavg1_2d_aer_Nx) is an hourly time-averaged 2-dimensional 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, ... \nNASA/GSFC/MERRA/aer/2, aerosol,atmosphere,carbon,dust,mass,merra,nasa,sea-salt,so2,so4 \n1980-01-01T00:00:00Z/2025-08-01T23:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GSFC_MERRA_aer_2)"]]
