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The GEOS-5 Atmospheric General Circulation Model: Mean Climate and Development from MERRA to FortunaThis report is a documentation of the Fortuna version of the GEOS-5 Atmospheric General Circulation Model (AGCM). The GEOS-5 AGCM is currently in use in the NASA Goddard Modeling and Assimilation Office (GMAO) for simulations at a wide range of resolutions, in atmosphere only, coupled ocean-atmosphere, and data assimilation modes. The focus here is on the development subsequent to the version that was used as part of NASA s Modern-Era Retrospective Analysis for Research and Applications (MERRA). We present here the results of a series of 30-year atmosphere-only simulations at different resolutions, with focus on the behavior of the 1-degree resolution simulation. The details of the changes in parameterizations subsequent to the MERRA model version are outlined, and results of a series of 30-year, atmosphere-only climate simulations at 2-degree resolution are shown to demonstrate changes in simulated climate associated with specific changes in parameterizations. The GEOS-5 AGCM presented here is the model used for the GMAO s atmosphere-only and coupled CMIP-5 simulations.
Document ID
Acquisition Source
Goddard Space Flight Center
Document Type
Technical Memorandum (TM)
Molod, Andrea
(Maryland Univ. College Park, MD, United States)
Takacs, Lawrence
(Science Systems and Applications, Inc. Lanham, MD, United States)
Suarez, Max
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bacmeister, Julio
(National Center for Atmospheric Research Boulder, CO, United States)
Song, In-Sun
(Next Generation Model Development Center Seoul)
Eichmann, Andrew
(Science Systems and Applications, Inc. Lanham, MD, United States)
Date Acquired
August 26, 2013
Publication Date
April 30, 2012
Subject Category
Meteorology And Climatology
Report/Patent Number
Distribution Limits
Public Use Permitted.
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