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. Our 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.
GEOS-5 simulates Chelyabinsk meteor 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.
GEOS-5 aerosol simulation in Science World
An article in a recent edition of Science World, a Classroom Magazine for Secondary Schools, describes GMAO's GEOS-5 aerosol transport simulation. View article.
Arctic Boreal Zone Workshop report available
The report from the NASA workshop on Earth System Modeling and Field Experiments in the Arctic Boreal Zone is now available with other materials from the workshop held at Goddard, May 22-24, 2012. View Report.
GEOS-5 dust forecasts now part of WMO Warning System
The near real time GEOS-5 dust forecasts are now included in the WMO Dust and Sand Storm Warning Advisory and Assessment System (WMO SDS-WAS).
GMAO Support for the National Climate Assessment (NCA)
The GMAO is supporting the National Climate Assessment (NCA) by providing enabling tools of assimilated data sets that synthesize and integrate the existing satellite (and conventional) data streams for the EOS/Aura period. As an initial contribution, regional and sector-specific products have been derived from MERRA and are available from our NCA web page. Our plan is to develop products from an ongoing climate analysis using GMAO's integrated assimilation systems that will enable an on-going, permanent assessment capacity and capability.
Read more about GMAO's NCA efforts.
- Verifying GEOS-5 sulfur dioxide simulations 9.19.2013 The Frostburg field campaign in November 2010 provided the opportunity to evaluate the simulation of SO2 and sulfate aerosols in GEOS-5. Read more.
- Sea Surface Temperatures, Heat, and Drought in the U.S. 8.12.2013The GMAO has conducted a series of experiments to determine what role, if any, SST anomalies played in forcing the extreme drought and heat waves experienced over the U.S. during the summers of 2011 and 2012. Read more.
- Quantifying Improvements to Streamflow Forecasts Stemming from Improved Soil Moisture Observations 7.2.2013The GMAO has conducted simulations to quantify the positive impacts that the soil moisture information provided by SMAP will have on streamflow forecasts. Read more.
- GEOS-5 contributions to the National Multi-Model Ensemble 3.25.2013The GMAO is an integral part of the National Multi-Model Ensemble project, an effort to improve intra-seasonal-to-interannual climate forecasting. Read more.
- Simulating the Transport of Aerosols with GEOS-5 2.27.2013The GMAO has conducted high resolution GEOS-5 simulations of tropospheric aerosols transported around the globe. Read more and view simulation results.
- GEOS-5 Successfully Predicts Stratospheric Sudden Warming Event 1.30.2013The GMAO's near-real-time meteorological analyses and weather forecasts with GEOS-5 successfully predicted the major stratospheric sudden warming event of January 2013. Read a discussion and initial analysis of this event.
- Assessing the Impact of Anomalously Warm NTA SSTs on ENSO Events 1.18.2013 Analyses of MERRA data are used to diagnose mechanisms by which sea surface temperature anomalies in the tropical north Atlantic can trigger ENSO events. Read more.
- Tracking Hurricanes with GEOS-5 12.31.2012 The GEOS-5 atmospheric model and assimilation analyses are used every day to generate 5-day weather forecasts. One view of GEOS-5 performance is provided from the forecasts of two of the most destructive storms of the 2012 hurricane season: Hurricanes Isaac and Sandy. Read more.
- Attributing the 2010 Russian Heat Wave 12.31.2012 The GMAO used GEOS-5 and MERRA to investigate the driving forces behind a major heat wave that occurred in western Russia in the summer of 2010 and to assess the predictability of such events. Read more.
- Drought in the United States 11.20.2012 The GMAO engages in research to understand drought and its predictability. GEOS-5 and MERRA have been used to examine drought in the U.S. in 2011 and 2012. In investigating the processes that control drought, the GMAO strives to improve the forecasting of drought on seasonal time scales. Read more.
* Decadal Prediction with GEOS-5 *
GEOS-5 Decadal Predictions for CMIP5 have been released at the PCMDI Earth System Grid. More information can be found at our Climate Diagnostics & Prediction web page.
* Latest Public Release of GEOS-5 *
A new release of GEOS-5, the Fortuna 2.5 version, is now publicly available through the NASA Open Source Agreement (NOSA). With this release, GMAO has updated our release mechanism, with access provided through an externally accessible Subversion Software Repository. Registration is required.
See our GEOS-5 access page for the details.
The NASA TM—2012-104606-Vol28 describes the evolution from the version of GEOS-5 used for MERRA to the Fortuna version that is the latest public release. It also provides an evaluation of the Fortuna version by comparison with observations.
Explore the MERRA Atlas.