GEOS-5 Earth System Modeling and Data Assimilation

The Goddard Earth Observing System Model, Version 5 (GEOS-5) is a system of models integrated using the Earth System Modeling Framework (ESMF). The GEOS-5 Data Assimilation System (GEOS-5 DAS) integrates the GEOS-5 Atmospheric Global Climate Model (GEOS-5 AGCM) with the Gridpoint Statistical Interpolation (GSI) atmospheric analysis developed jointly with NOAA/NCEP/EMC. The GEOS-5 systems are being developed in the GMAO to support NASA's earth science research in data analysis, observing system modeling and design, climate and weather prediction, and basic research.

GEOS-5 is supported by NASA's Modeling Analysis and Prediction (MAP) Program.

News

• 7 October 2010. GEOS5 AGCM can now be downloaded through geos5.org subversion repository. GEOS-5 public AGCM Documentation and Access.

• 2 April 2009. Documentation section now has an entry describing GEOS-5 configurations used to support specific missions.

• 16 November 2007. The GEOS-5 Forecasting System, including a wealth of meteorological and chemical constituents/aerosols, will be supporting the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) during the Spring and Summer of 2008. A description of the GEOS-5 Configuration for ARCTAS is available.

• 1 November 2006. GEOS-5 AGCM Release 1.0 is now available from the MAP Software Repository. This is the first component released from the GEOS-5 System. Climate simulations and DAS integrations have been undertaken with this release and some results are presented in the Results section of this page. See the Release notes for details of this release.

GEOS-5 Systems

GEOS Advanced ADAS: Hybrid Ensemble-Variational Data Assimilation System

In its Forward Processing application, the GMAO atmospheric data assimilation system is configured to exercise a hybrid 4D ensemble-variational (4DEnVar) strategy. This system combines the GMAO atmospheric general circulation model [AGCM] with the jointly-developed GMAO/NCEP Grid-point Statistical Interpolation GSI analysis for its hybrid high-resolution analysis. Its supporting ensemble DA relies on the ensemble square-root filter [EnSRF] of NOAA/ESRL with adaptations to the software and its science to serve its GMAO-GEOS application.

Further details on the GMAO atmospheric DAS can be found below:

1. [GEOS Hybrid ADAS ]
2. GEOS ADAS Radiance Monitoring

Documentation for Users and Developers

1. GEOS GCM Documentation and Access
2. GEOS User's and Developer's Guides for GEOS GCM
   • Current Version: Documentation for GEOS GCM v10
3. MAPL software
4. GEOS-5 AGCM Overview
5. GEOS-5 Brown Bag Seminars
6. GEOS-5 Software Engineering
7. GEOS-5 Design Documents
8. GEOS-5 Configurations for Mission Support
   • GEOS-5 Configuration for ARCTAS
   • GEOS-5 Configuration for GloPac
   • GEOS-5 Configuration for DISCOVER-AQ
   • GEOS-5 Configuration for PIESA
   • GEOS-5 Configuration for AR5
9. GEOS-5 Configuration for Nature Runs
   • Configuration for GEOS-5.12 Nature Run (Non-hydrostatic, 7km)
10. GEOS-5 Web Services
    • GEOS-5 GrADS Data Server (GDS)
11. GEOS-5 Validation/Assimilation Data
    • GEOS-5 Aerosol Observations (AeroObs)
12. GEOS-5 Aerosol Group
    • Overview
    • Preliminary Integrated Earth System Analysis (PIESA)
    • GEOS-5 Checkout and Build Instructions for PIESA
    • Quick Fire Emission Dataset (QFED)
    • GEOS-5 Modal Aerosol Model (MAM)
    • Publications
13. Tools
    • RadApp -- An offline instance of the GEOS-5 radiative transfer module
14. General Settings
    • History Control -- How to control output from GEOS-5 GCM

System Validation and Evaluation

1. The September 2010 PIESA/Aerosol Experiments