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MERRA-2 tavgU_2d_aer_Nx: 2d,diurnal,Time-averaged,Single-Level,Assimilation,Aerosol Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TUNXAER) at GES DISC
Entry ID: M2TUNXAER_5.12.4


Summary
Abstract: The Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2) is a NASA atmospheric reanalysis for the satellite era using the Goddard Earth Observing System Model, Version 5 (GEOS-5) with its Atmospheric Data Assimilation System (ADAS), version 5.12.4. The MERRA project focuses on historical climate analyses for a broad range of weather and climate time scales and places the NASA EOS suite of observations in a climate context.

MERRA-2 was initiated as an intermediate project between the aging MERRA data and the next generation of Earth system analysis envisioned for the future coupled reanalysis. Without a substantial investment to update MERRA's data assimilation routines, the system lacked the capability to analyze the latest observations. In addition, numerous advances to the GEOS5 system had been implemented since freezing the MERRA system in 2008. Therefore, a new full reanalysis integration was undertaken. MERRA-2 covers the period 1980-present, continuing as an ongoing climate analysis as resources allow.

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Sign up for the MERRA-2 listserv to receive announcements on the latest data information, tools and services that become available, data announcements from GMAO and more! Contact the GES DISC User Services (gsfc-help-disc@lists.nasa.gov) to be added to the list.

MERRA-2 Science Data and Data Processing Questions

Do you have a question about MERRA/MERRA-2? Take a look at the File Specification Document (https://gmao.gsfc.nasa.gov/pubs/docs/Bosilovich785.pdf) and if that doesn't answer your question, users can contact staff with questions on the data, data processing and science. Send questions to merra-questions@lists.nasa.gov.

Related URL
Link: View Related Information
Description: M2TUNXAER variable


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Description: Access the data via HTTPS.


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Description: Use the Simple Subset Wizard (SSW) to submit subset requests for data sets across multiple data centers from a single unified interface.


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Description: The GES-DISC Interactive Online Visualization ANd aNalysis Interface (Giovanni) is a web-based tool that allows users to interactively visualize and analyze data.


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Description: Use the Earthdata Search to find and retrieve data sets across multiple data centers.


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Description: The GrADS Data Server (GDS) is another form of OPeNDAP that provides subsetting and some analysis services across the Internet.


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Description: Access the data via the OPeNDAP protocol.


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Description: The GMAO home page


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Description: MERRA-2 File Specification Document


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Description: README Document

Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Creator: Global Modeling and Assimilation Office (GMAO)
Dataset Title: MERRA-2 tavgU_2d_aer_Nx: 2d,diurnal,Time-averaged,Single-Level,Assimilation,Aerosol Diagnostics V5.12.4
Dataset Series Name: M2TUNXAER
Dataset Release Date: 2015-06-30T00:00:00.000Z
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: Goddard Earth Sciences Data and Information Services Center (GES DISC)
Version: 5.12.4
Data Presentation Form: Digital Science Data
Online Resource: https://disc.gsfc.nasa.gov/datacollection/M2TUNXAER_5.12.4.html


Temporal Coverage
Start Date: 1980-01-01


Location Keywords
GEOGRAPHIC REGION > GLOBAL


Science Keywords
ATMOSPHERE >AEROSOLS    [Definition]
ATMOSPHERE >AEROSOLS >AEROSOL EXTINCTION    [Definition]
ATMOSPHERE >AEROSOLS >AEROSOL OPTICAL DEPTH/THICKNESS    [Definition]
ATMOSPHERE >AEROSOLS >AEROSOL OPTICAL DEPTH/THICKNESS >ANGSTROM EXPONENT    [Definition]
ATMOSPHERE >AEROSOLS >AEROSOL PARTICLE PROPERTIES    [Definition]
ATMOSPHERE >AEROSOLS >CARBONACEOUS AEROSOLS    [Definition]
ATMOSPHERE >AEROSOLS >DUST/ASH/SMOKE    [Definition]
ATMOSPHERE >AIR QUALITY >SULFUR OXIDES    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >SULFUR COMPOUNDS    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >SULFUR COMPOUNDS >SULFATE    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >SULFUR COMPOUNDS >SULFUR DIOXIDE    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >SULFUR COMPOUNDS >SULFUR OXIDES    [Definition]


Platform
MERRA-2 >The second Modern-Era Retrospective analysis for Research and Applications


Instrument
NOT APPLICABLE


Project
MERRA-2 >The second Modern-Era Retrospective analysis for Research and Applications


Keywords
BEDI
Agriculture and Forestry
Biodiversity
Climate
Disasters
Terrestrial and Freshwater Ecosystems
Human Health
Ocean and Coastal Resources and Ecosystems
Transportation
Water Resources
Weather
Black Carbon
BC
DMS
SO2
SO4
Sea Salt


Data Set Progress
ACTIVE


Data Center
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA    [Information]
Data Center URL: https://disc.gsfc.nasa.gov/

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Distribution
Distribution_Media: Online Archive
Distribution_Size: 481.0 MB
Distribution_Format: netCDF
Fees: Free


Personnel
GLOBAL MODELING AND ASSIMILATION OFFICE
Role: TECHNICAL CONTACT
Phone: 301-614-6142
Email: data at gmao.gsfc.nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 610.1
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


DANA OSTRENGA
Role: METADATA AUTHOR
Phone: 301-614-5475
Fax: 301-614-5268
Email: dana.ostrenga at nasa.gov
Contact Address:
Code 610.2 Bldg 32 Rm S151
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 21230
Country: USA


MICHAEL BOSILOVICH
Role: INVESTIGATOR
Email: Michael.Bosilovich at nasa.gov
Contact Address:
NASA/Goddard Space Flight Center
Global Modeling and Assimilation Office
Code 610.1
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


Publications/References
Bosilovich, M. G., S. Akella, L. Coy, R. Cullather, C. Draper, R. Gelaro, R. Kovach, Q.Liu, A. Molod, P. Norris, K. Wargan, W. Chao, R. Reichle, L. Takacs, Y. Vikhliaev, S. Bloom, A. Collow, S. Firth, G. Labow, G. Partyka, S. Pawson, O. Reale, S. D. Schubert, and M. Suarez (2015-01-01T00:00:00.000Z), 2015b: MERRA-2: Initial Evaluation of the Climate, Technical Report Series on Global Modeling and Data Assimilation, 43, 136, doi:NASA/TM?2015-104606/Vol. 43

Bloom, S., L. Takacs, A. DaSilva, and D. Ledvina (1996-01-01T00:00:00.000Z), Data assimilation using incremental analysis updates, Monthly Weather Review, 124, 1256-1271

Bloom, S., A. da Silva, D. Dee, M. Bosilovich, J.-D. Chern, S. Pawson, S. Schubert, M. Sienkiewicz, I. Stajner, W.-W. Tan, M.-L. Wu (2005-01-01T00:00:00.000Z), Documentation and Validation of the Goddard Earth Observing System (GEOS) Data Assimilation System - Version 4, Technical Report Series on Global Modeling and Data Assimilation, 26, 104606

Collins, N., G. Theurich, C. DeLuca, M. Suarez, A. Trayanov, V. Balaji, P. Li, W. Yang, C. Hill, and A. da Silva (2005-01-01T00:00:00.000Z), Design and implementation of components in the Earth System Modeling Framework, International Journal of High Performance Computing Applications, 19, 341-350, doi:10.1177/1094342005056120

Koster, R. D., M. J. Suarez, A. Ducharne, M. Stieglitz, and P. Kumar (2000-01-01T00:00:00.000Z), A catchment-based approach to modeling land surface processes in a GCM, Part 1, Model Structure, Journal of Geophysical Res., 105, 24809-24822

Purser, R. J., W.-S. Wu, D. F. Parrish, and N. M. Roberts (2003-01-01T00:00:00.000Z), Numerical aspects of the application of recursive filters to variational statistical analysis. Part I: Spatially homogeneous and isotropic Gaussian covariances, Monthly Weather Review, 131, 1524-1535

Purser, R. J., W.-S. Wu, D. F. Parrish, and N. M. Roberts (2003-01-01T00:00:00.000Z), Numerical aspects of the application of recursive filters to variational statistical analysis. Part II: Spatially inhomogeneous and anisotropic general covariances, Monthly Weather Review, 131, 1536-1548

Wu, W.-S., R.J. Purser and D.F. Parrish (2002-01-01T00:00:00.000Z), Three-dimensional variational analysis with spatially inhomogeneous covariances, Monthly Weather Review, 130, 2905-2916
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-06-14
Last DIF Revision Date: 2018-12-06



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