Goddard Earth Observing System Model, Version 5 (GEOS-5):  GEOS-5 is a system of models integrated using the Earth System Modeling Framework (ESMF). The GEOS-5 DAS integrates the 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.

Ocean Biology Modeling: GMAO is a leader in the effort to include ocean biological and biogeochemical processes in coupled models. The NASA Ocean Biogeochemical Model (NOBM) was built by GMAO personnel and is in the process of being coupled to the complex and interactive GEOS-5 climate systems.

Earth Science Modeling Framework (ESMF) is a collaborative effort to implement this approach in all GMAO systems. Code development and conversion exercises will require much testing with all major GMAO systems. To facilitate the use of ESMF, GMAO is leading the development of MAPL, a software layer and set of conventions to standardize the use of the ESMF.

GEOS CCM: The GEOS Chemistry Climate Model enhances the GEOS AGCM with the inclusion of full tropospheric and stratospheric chemistry tested in the Global Modeling Initiative (GMI) Chemistry Transport Model (CTM).