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Description

M2TMNXADG (or tavgM_2d_adg_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 (extended), such as dry and wet deposition of each aerosol component, dust emission and sedimentation for each sized bin, and organic carbon convective scavenging. 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 post your question to the NASA Earthdata Forum (forum.earthdata.nasa.gov) or email the GES DISC Help Desk (gsfc-dl-help-disc@mail.nasa.gov).

Version Description

The GEOS-5 model version used for processing MERRA-2

Product Summary

Platforms
MERRA-2
Instruments
NOT APPLICABLE
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
0.625 Decimal Degrees x 0.5 Decimal Degrees
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1980-01-01 to Present
Data Partner
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Concept ID
C1276812865-GES_DISC
Data State
ACTIVE
Number of Files/Granules
555
Processing Level
4
Published
Updated
Science Keywords
Aerosols ,
Carbonaceous Aerosols ,
Dust/Ash/Smoke ,
Sulfur Dioxide ,
Sulfur Oxides ,
Sulfate ,
Sulfate Particles ,
Sulfur Oxides ,
Particulate Matter ,
Emissions ,
UV Aerosol Index ,
Gas/Aerosol Composition ,
Aerosol Extinction ,
Deposition

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Global Modeling And Assimilation Office, & Pawson, S. (2015). MERRA-2 tavgM_2d_adg_Nx: 2d,Monthly mean,Time-averaged,Single-Level,Assimilation,Aerosol Diagnostics (extended) V5.12.4 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/RZIK2TV7PP38 Date Accessed: 2026-05-15

Documents

Publications Citing This Dataset

Filters
Title Year Author Topic
Global Impact of ENSO on Dust Activities with Emphasis on the Key Region Huang, Yuhong, Liu, Xiaodong, Yin, ZhiYong, An, Zhisheng Aerosols, Carbonaceous Aerosols, Dust/Ash/Smoke, Sulfur Dioxide, Sulfur Oxides, Sulfate, Sulfate Particles, Sulfur Oxides, Particulate Matter, Emissions, UV Aerosol Index, Gas/Aerosol Composition, Aerosol Extinction, Deposition, Aerosol Optical Depth/Thickness, Angstrom Exponent, Aerosol Particle Properties, Organic Particles, Sulfur Compounds, Dimethyl Sulfide, Black Carbon, Sea Salt, PARTICULATE MATTER (PM 2.5), PARTICULATE MATTER (PM 10), PARTICULATE MATTER (PM 1.0)
The global dust cycle and uncertainty in CMIP5 (Coupled Model Wu, Chenglai, Lin, Zhaohui, Liu, Xiaohong Aerosols, Aerosol Extinction, Aerosol Optical Depth/Thickness, Angstrom Exponent, Aerosol Particle Properties, Carbonaceous Aerosols, Dust/Ash/Smoke, Organic Particles, Sulfate Particles, Sulfur Oxides, Sulfur Compounds, Sulfate, Sulfur Dioxide, Sulfur Oxides, Particulate Matter, Dimethyl Sulfide, Black Carbon, Sea Salt, PARTICULATE MATTER (PM 2.5), PARTICULATE MATTER (PM 10), PARTICULATE MATTER (PM 1.0), Emissions, UV Aerosol Index, Gas/Aerosol Composition, Deposition
Understanding processes that control dust spatial distributions with global climate models and satellite observations Wu, Mingxuan, Liu, Xiaohong, Yu, Hongbin, Wang, Hailong, Shi, Yang, Yang, Kang, Darmenov, Anton, Wu, Chenglai, Wang, Zhien, Luo, Tao, Feng, Yan, Ke, Ziming Dust/Ash/Smoke, Carbonaceous Aerosols, Organic Particles, Sulfate Particles, Sulfur Oxides, Sulfur Compounds, Sulfate, Sulfur Dioxide, Sulfur Oxides, Dimethyl Sulfide, Aerosol Particle Properties, Particulate Matter, Aerosols, Surface Pressure, Pressure Thickness, Relative Humidity, Sea Salt, Black Carbon, Air Mass/Density, Emissions, UV Aerosol Index, Gas/Aerosol Composition, Aerosol Extinction, Deposition, Aerosol Optical Depth/Thickness, Angstrom Exponent, PARTICULATE MATTER (PM 2.5), PARTICULATE MATTER (PM 10), PARTICULATE MATTER (PM 1.0), Atmospheric Ozone, Sea Level Pressure, U/V Wind Components, U/V Wind Components, Potential Vorticity, Vertical Wind Velocity/Speed, Vertical Profiles, Upper Air Temperature, Air Temperature, Specific Humidity, Atmospheric Water Vapor, Cloud Liquid Water/Ice, Cloud Fraction, Altitude, Geopotential Height, Ozone Profiles
Temporal variation of dust emissions in dust sources over Central Asia in recent decades and the climate linkages Shi, Lamei, Zhang, Jiahua, Yao, Fengmei, Zhang, Da, Guo, Huadong Surface Pressure, Air Temperature, Specific Humidity, Surface Winds, Wind Speed, Geopotential Height, Aerosols, Carbonaceous Aerosols, Dust/Ash/Smoke, Sulfur Dioxide, Sulfur Oxides, Sulfate, Sulfate Particles, Sulfur Oxides, Particulate Matter, Emissions, UV Aerosol Index, Gas/Aerosol Composition, Aerosol Extinction, Deposition
Annual variability of dissolved manganese in Northeast Pacific along Line-P: 20102013 Sim, Nari, Orians, Kristin J. Ultraviolet Radiation, Aerosols, Carbonaceous Aerosols, Dust/Ash/Smoke, Sulfur Dioxide, Sulfur Oxides, Sulfate, Sulfate Particles, Sulfur Oxides, Particulate Matter, Emissions, UV Aerosol Index, Gas/Aerosol Composition, Aerosol Extinction, Deposition
An Assessment of Atmospheric and Meteorological Factors Regulating Red Li, Wenzhao, El-Askary, Hesham, Qurban, Mohamed, Proestakis, Emmanouil, Garay, Michael, Kalashnikova, Olga, Amiridis, Vassilis, Gkikas, Antonis, Marinou, Eleni, Piechota, Thomas, Manikandan, K. Aerosols, Aerosol Extinction, Aerosol Optical Depth/Thickness, Angstrom Exponent, Aerosol Particle Properties, Carbonaceous Aerosols, Dust/Ash/Smoke, Organic Particles, Sulfate Particles, Sulfur Oxides, Sulfur Compounds, Sulfate, Sulfur Dioxide, Sulfur Oxides, Particulate Matter, Dimethyl Sulfide, Black Carbon, Sea Salt, PARTICULATE MATTER (PM 2.5), PARTICULATE MATTER (PM 10), PARTICULATE MATTER (PM 1.0), Emissions, UV Aerosol Index, Gas/Aerosol Composition, Deposition, Turbidity, Air Quality, Particulates
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Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor Offset
OCEMBF OCEMBF kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCEMBG OCEMBG kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCHYPHIL OCHYPHIL kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCSD001 OCSD001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCSD002 OCSD002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCSV001 OCSV001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCSV002 OCSV002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCWT001 OCWT001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
OCWT002 OCWT002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SO2EMAN SO2EMAN kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SO2EMBB SO2EMBB kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SO2EMVE SO2EMVE kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SO2EMVN SO2EMVN kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SO4EMAN SO4EMAN kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSAERIDX SSAERIDX 1 float32 999999986991104 N/A N/A N/A
SSDP001 SSDP001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSDP002 SSDP002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSDP003 SSDP003 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSDP004 SSDP004 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSDP005 SSDP005 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSEM001 SSEM001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSEM002 SSEM002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSEM003 SSEM003 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSEM004 SSEM004 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSEM005 SSEM005 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSEXTTFM SSEXTTFM 1 float32 999999986991104 N/A N/A N/A
SSSCATFM SSSCATFM 1 float32 999999986991104 N/A N/A N/A
SSSD001 SSSD001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSD002 SSSD002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSD003 SSSD003 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSD004 SSSD004 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSD005 SSSD005 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSV001 SSSV001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSV002 SSSV002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSV003 SSSV003 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSV004 SSSV004 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSSV005 SSSV005 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSWT001 SSWT001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSWT002 SSWT002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSWT003 SSWT003 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSWT004 SSWT004 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SSWT005 SSWT005 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUDP001 SUDP001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUDP002 SUDP002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUDP003 SUDP003 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUDP004 SUDP004 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUEM001 SUEM001 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUEM002 SUEM002 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUEM003 SUEM003 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
SUEM004 SUEM004 kg m-2 s-1 float32 999999986991104 N/A N/A N/A
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