Welcome to the GMAO's Research Web Site

The Global Modeling and Assimilation Office (GMAO) is a component of the Earth Sciences Division in Goddard's Sciences and Exploration Directorate. mosaic of GMAO plotsOur research and development activities aim to maximize the impact of satellite observations in climate, weather and atmospheric composition prediction using comprehensive global models and data assimilation. To achieve this goal, the GMAO develops models and assimilation systems for the atmosphere, ocean, and land surface, generates products to support NASA instrument teams and the NASA Earth science program, and undertakes scientific research to inform system development pathways.

What's New

GMAO Contributes to the SMAP Project: Level-4 products released

The NASA Global Modeling and Assimilation Office (GMAO) is pleased to announce the availability of Level-4 datasets from the NASA Soil Moisture Active Passive (SMAP) mission. The new datasets include the SMAP Surface and Root Zone Soil Moisture (L4_SM) and the Net Ecosystem Carbon Exchange (L4_C) products.
Read more.

Welcoming Tom Clune to the GMAO

On October 4, 2015, Dr. Tom Clune joined the GMAO. Recently with the Scientific Software Support Office and the Computing Center at NASA GSFC, Tom brings his vast experience of scientific software development and code infrastructure management into the GMAO. Tom's background gives him the basis to lead GMAO's activities to further enhance our high-performance computing capabilities.

GMAO Scientist Chosen to Receive 2016 AMS Hydrologic Sciences Medal

Randy Koster of the GMAO will receive the "Hydrologic Sciences Medal" from the American Meteorological Society, "… for ground-breaking contributions to the understanding of land-atmosphere interactions and their effects on hydroclimatic predictability and prediction."
Read AMS Awards Announcement.

GMAO Chief Contributes to NASA Weather Focus Workshop Report

The report from the NASA Weather Focus Area Workshop in April, which had a substantial GMAO participation, is now released: "Workshop Report on Scientific Challenges and Opportunities in the NASA Weather Focus Area" by X. Zeng, S. Ackerman, R.D. Ferraro, J.J. Murray, S. Pawson, C. Reynolds, and J. Teixiera
See Report.

CO2 Global Transport Simulation from GEOS-5 Nature Run

A NASA press release shows a GMAO animation of the transport of carbon dioxide from May 2005 to June 2007, as simulated using the GEOS-5 model. The Nature Run simulation models this process on a 7 km grid. See NASA Press Release:
"NASA Computer Model Provides a New Portrait of Carbon Dioxide".

GEOS iODAS: Ocean Data Portal

The GMAO ocean data assimilation (GEOS iODAS) output is now available online. Output includes a one-degree analysis from 1960-2009, that is used to initialize the GMAO decadal forecasts, and a half-degree analysis, beginning in 1993, that assimilates altimeter data. The half-degree analysis is included in the ensemble of analyses used to initialize the GMAO seasonal forecasts from 1982 onwards.
Visit the Ocean Data Portal.

GEOS-5 simulates Chelyabinsk meteor thumbnail of journal cover image stratospheric dust belt

GEOS-5 has simulated the circumpolar mid-stratosphere dust belt arising from the Chelyabinsk meteor's aerosol plume. The study was published in Geophysical Review Letters (GRL), which chose an image from the simulation for its front cover.
See the NASA press release.

GEOS-5 simulation featured in National Geographic

A GEOS-5 simulation of Hurricane Sandy was featured in a National Geographic article on rising seas. More information on this simulation is available on our Tracking Hurricanes with GEOS-5 research highlight.

GMAO Contributes to Sea Ice Outlook

Since the GEOS-5 seasonal forecasts are global with an initialized sea-ice distribution, the GMAO has begun to contribute to the Sea Ice Outlook for September Sea Ice extent organized by SEARCH and ARCUS. The consensus is for an increasing downward trend of September sea ice extent, well below the 1979-2007 September mean. Read more.

Upgrade to GEOS-5 Observation Impact Monitoring

The GEOS-5 Observation Impact Monitoring System has been upgraded to include the effects of moist physical processes. The upgrade provides more accurate estimates of observation impact in GEOS-5, especially for moist-sensitive observations from AIRS, MHS, TMI, and some wind observations. View Observation Impacts.

Research Highlights