MERRA-2 M2T1NXAER: Aerosol Diagnostics V5.12.4

Dataset Availability

1980-01-01T00:00:00Z–2024-12-01T23:00:00Z

Dataset Provider

NASA/MERRA

Earth Engine Snippet

ee.ImageCollection("NASA/GSFC/MERRA/aer/2")

Cadence

1 Hour

Tags

aerosol carbon dust mass merra nasa sea-salt so2 so4

Description

M2T1NXAER (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, 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 in the FAQ

The data field is time-stamped with the central time of an hour starting from 00:30 UTC, e.g.: 00:30, 01:30, ... , 23:30 UTC.

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.

Bands

Resolution
69375 meters

Y Resolution
55000 meters

Bands

Name	Units	Description
BCANGSTR		Black carbon angstrom parameter [470-870 nm]
BCCMASS	kg/m^2	Black carbon column mass density
BCEXTTAU		Black carbon extinction AOT [550 nm]
BCFLUXU	kg/m/s	Black carbon column u-wind mass flux
BCFLUXV	kg/m/s	Black carbon column v-wind mass flux
BCSCATAU		Black carbon scattering AOT [550 nm]
BCSMASS	kg/m^3	Black carbon surface mass concentration
DMSCMASS	kg/m^2	Dms column mass density
DMSSMASS	kg/m^3	Dms surface mass concentration
DUANGSTR		Dust angstrom parameter [470-870 nm]
DUCMASS25	kg/m^2	Dust column mass density - PM2.5
DUCMASS	kg/m^2	Dust column mass density
DUEXTT25		Dust extinction AOT [550 nm] - PM2.5
DUEXTTAU		Dust extinction AOT [550 nm]
DUFLUXU	kg/m/s	Dust column u-wind mass flux
DUFLUXV	kg/m/s	Dust column v-wind mass flux
DUSCAT25		Dust scattering AOT [550 nm] - PM2.5
DUSCATAU		Dust scattering AOT [550 nm]
DUSMASS25	kg/m^3	Dust surface mass concentration - PM2.5
DUSMASS	kg/m^3	Dust surface mass concentration
OCANGSTR		Organic carbon angstrom parameter [470-870 nm]
OCCMASS	kg/m^2	Organic carbon column mass density
OCEXTTAU		Organic carbon extinction AOT [550 nm]
OCFLUXU	kg/m/s	Organic carbon column u-wind mass flux
OCFLUXV	kg/m/s	Organic carbon column v-wind mass flux
OCSCATAU		Organic carbon scattering AOT [550 nm]
OCSMASS	kg/m^3	Organic carbon surface mass concentration
SO2CMASS	kg/m^2	So2 column mass density
SO2SMASS	kg/m^3	So2 surface mass concentration
SO4CMASS	kg/m^2	SO4 column mass density
SO4SMASS	kg/m^3	SO4 surface mass concentration
SSANGSTR		Sea salt angstrom parameter [470-870 nm]
SSCMASS25	kg/m^2	Sea salt column mass density - PM2.5
SSCMASS	kg/m^2	Sea salt column mass density
SSEXTT25		Sea salt extinction AOT [550 nm] - PM2.5
SSEXTTAU		Sea salt extinction AOT [550 nm]
SSFLUXU	kg/m/s	Sea salt column u-wind mass flux
SSFLUXV	kg/m/s	Sea salt column v-wind mass flux
SSSCAT25		Sea salt scattering AOT [550 nm] - PM2.5
SSSCATAU		Sea salt scattering AOT [550 nm]
SSSMASS25	kg/m^3	Sea salt surface mass concentration - PM2.5
SSSMASS	kg/m^3	Sea salt surface mass concentration
SUANGSTR		SO4 angstrom parameter [470-870 nm]
SUEXTTAU		SO4 extinction AOT [550 nm]
SUFLUXU	kg/m/s	SO4 column u-wind mass flux
SUFLUXV	kg/m/s	SO4 column v-wind mass flux
SUSCATAU		SO4 scattering AOT [550 nm]
TOTANGSTR		Total aerosol angstrom parameter [470-870 nm]
TOTEXTTAU		Total aerosol extinction AOT [550 nm]
TOTSCATAU		Total aerosol scattering AOT [550 nm]

Terms of Use

Terms of Use

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('NASA/GSFC/MERRA/aer/2')
                  .filter(ee.Filter.date('2022-02-01', '2022-02-02'));
var black_carbon_column_u_wind_mass_flux = dataset.select('BCFLUXU');
var bccVis = {
  min: -0.0000116,
  max: 0.0000165,
  palette: ['001137', '01abab', 'e7eb05', '620500']
};
Map.setCenter(-95.62, 39.91, 2);
Map.addLayer(black_carbon_column_u_wind_mass_flux, bccVis);

Open in Code Editor

MERRA-2 M2T1NXAER: Aerosol Diagnostics V5.12.4

M2T1NXAER (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, …

NASA/GSFC/MERRA/aer/2, aerosol,carbon,dust,mass,merra,nasa,sea-salt,so2,so4

1980-01-01T00:00:00Z/2024-12-01T23:00:00Z

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