M2T1NXAER (atau tavg1_2d_aer_Nx) adalah pengumpulan data 2 dimensi yang dirata-ratakan per jam dalam analisis Retrospektif Era Modern untuk Riset dan Aplikasi versi 2 (MERRA-2). Kumpulan data ini terdiri dari diagnostik aerosol yang diasimilasi, seperti kerapatan massa kolom komponen aerosol (karbon hitam, debu, garam laut, sulfat, dan karbon organik), konsentrasi massa permukaan komponen aerosol, dan ketebalan optik aerosol (AOT) kepunahan (dan hamburan) total pada 550 nm. Total PM1.0, PM2.5, dan PM10
dapat diperoleh dengan formula yang dijelaskan
dalam FAQ
Kolom data diberi stempel waktu dengan
waktu tengah satu jam yang dimulai dari 00.30 UTC,
misalnya: 00.30, 01.30, ... , 23.30 UTC.
MERRA-2 adalah versi terbaru analisis ulang atmosfer global untuk era satelit yang diproduksi oleh NASA Global Modeling and Assimilation Office (GMAO) menggunakan Goddard Earth Observing System Model (GEOS) versi 5.12.4.
Dataset ini mencakup periode 1980 hingga saat ini dengan latensi ~3 minggu setelah akhir bulan.
Band
Ukuran Piksel 69.375 meter
Ukuran Piksel Y 55.000 meter
Band
Nama
Unit
Ukuran Piksel
Deskripsi
BCANGSTR
meter
Parameter angstrom karbon hitam [470-870 nm]
BCCMASS
kg/m^2
meter
Massa jenis kolom karbon hitam
BCEXTTAU
meter
AOT kepunahan karbon hitam [550 nm]
BCFLUXU
kg/m/s
meter
Fluks massa angin-u kolom karbon hitam
BCFLUXV
kg/m/s
meter
Fluks massa angin vertikal kolom karbon hitam
BCSCATAU
meter
AOT hamburan karbon hitam [550 nm]
BCSMASS
kg/m^3
meter
Konsentrasi massa permukaan karbon hitam
DMSCMASS
kg/m^2
meter
Massa jenis kolom DMS
DMSSMASS
kg/m^3
meter
Konsentrasi massa permukaan Dms
DUANGSTR
meter
Parameter angstrom debu [470-870 nm]
DUCMASS25
kg/m^2
meter
Massa jenis kolom debu - PM2.5
DUCMASS
kg/m^2
meter
Massa jenis kolom debu
DUEXTT25
meter
AOT kepunahan debu [550 nm] - PM2.5
DUEXTTAU
meter
AOT kepunahan debu [550 nm]
DUFLUXU
kg/m/s
meter
Fluks massa angin u kolom debu
DUFLUXV
kg/m/s
meter
Fluks massa angin vertikal kolom debu
DUSCAT25
meter
Penyerapan debu AOT [550 nm] - PM2.5
DUSCATAU
meter
Penyerapan debu AOT [550 nm]
DUSMASS25
kg/m^3
meter
Konsentrasi massa permukaan debu - PM2.5
DUSMASS
kg/m^3
meter
Konsentrasi massa permukaan debu
OCANGSTR
meter
Parameter angstrom karbon organik [470-870 nm]
OCCMASS
kg/m^2
meter
Massa jenis kolom karbon organik
OCEXTTAU
meter
Kepunahan karbon organik AOT [550 nm]
OCFLUXU
kg/m/s
meter
Fluks massa angin u kolom karbon organik
OCFLUXV
kg/m/s
meter
Fluks massa angin vertikal kolom karbon organik
OCSCATAU
meter
AOT hamburan karbon organik [550 nm]
OCSMASS
kg/m^3
meter
Konsentrasi massa permukaan karbon organik
SO2CMASS
kg/m^2
meter
Massa jenis kolom So2
SO2SMASS
kg/m^3
meter
Konsentrasi massa permukaan SO2
SO4CMASS
kg/m^2
meter
Massa jenis kolom SO4
SO4SMASS
kg/m^3
meter
Konsentrasi massa permukaan SO4
SSANGSTR
meter
Parameter angstrom garam laut [470-870 nm]
SSCMASS25
kg/m^2
meter
Massa jenis kolom garam laut - PM2.5
SSCMASS
kg/m^2
meter
Massa jenis kolom garam laut
SSEXTT25
meter
Kepunahan garam laut AOT [550 nm] - PM2.5
SSEXTTAU
meter
Kepunahan garam laut AOT [550 nm]
SSFLUXU
kg/m/s
meter
Fluks massa angin u kolom garam laut
SSFLUXV
kg/m/s
meter
Fluks massa angin vertikal kolom garam laut
SSSCAT25
meter
Sebaran AOT garam laut [550 nm] - PM2.5
SSSCATAU
meter
Hamburan garam laut AOT [550 nm]
SSSMASS25
kg/m^3
meter
Konsentrasi massa permukaan garam laut - PM2.5
SSSMASS
kg/m^3
meter
Konsentrasi massa permukaan garam laut
SUANGSTR
meter
Parameter angstrom SO4 [470-870 nm]
SUEXTTAU
meter
AOT kepunahan SO4 [550 nm]
SUFLUXU
kg/m/s
meter
Fluks massa angin u kolom SO4
SUFLUXV
kg/m/s
meter
Fluks massa angin vertikal kolom SO4
SUSCATAU
meter
AOT hamburan SO4 [550 nm]
TOTANGSTR
meter
Parameter angstrom aerosol total [470-870 nm]
TOTEXTTAU
meter
Total AOT kepunahan aerosol [550 nm]
TOTSCATAU
meter
Total AOT hamburan aerosol [550 nm]
Persyaratan Penggunaan
Persyaratan Penggunaan
NASA mempromosikan pembagian semua data secara penuh dan terbuka dengan komunitas riset dan aplikasi, industri swasta, akademisi, dan masyarakat umum.
M2T1NXAER (atau tavg1_2d_aer_Nx) adalah pengumpulan data 2 dimensi yang dirata-ratakan per jam dalam analisis Retrospektif Era Modern untuk Riset dan Aplikasi versi 2 (MERRA-2). Kumpulan data ini terdiri dari diagnostik aerosol yang diasimilasi, seperti kepadatan massa kolom komponen aerosol (karbon hitam, debu, garam laut, sulfat, dan karbon organik), konsentrasi massa permukaan komponen aerosol, …
[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)"]]
