Research in the GMAO emphasizes the use of satellite observations in global modeling systems, comprised of atmosphere, ocean, land-surface, and biogeochemistry model components. These components are integrated for assimilation and forecast systems to address questions about climate variability, water and energy budgets, composition, and weather and climate prediction; to form an integrated Earth system analysis; and to contribute to the design of future satellite missions.

Details about refereed scientific papers published by the GMAO staff are compiled on our GMAO Publications page.

This page lists titles and links to GMAO Research Briefs. These writeups are summaries of selected GMAO scientific research activities.


thumbnail of figure graphicJuly 2018 Mid-Atlantic Atmospheric River and Extreme Precipitation Event Captured by MERRA-2[10.11.2018]
Beginning on July 21, 2018, an atmospheric river, a narrow stream of enhanced water vapor transport, positioned itself over the U.S. mid-Atlantic region resulting in record daily rainfall totals and extensive flash flood warnings as the entire month's worth of precipitation fell in a matter of days. This rainfall event was clearly captured by GMAO's Modern Era Retrospective analysis for Research and Applications, version 2 (MERRA-2).

» Read Brief (PDF).


thumbnail of figure graphicUsing SMAP Soil Moisture Data to Calibrate a Land Surface Model[05.09.2017]
Soil moisture retrievals from the Soil Moisture Active Passive (SMAP) mission are used to evaluate and calibrate the treatment of soil moisture recharge in the GMAO Catchment land surface model. The improvements lead to better simulations of soil moisture and streamflow, as demonstrated through comparisons against independent in situ data.

» Read Brief (PDF).
thumbnail of figure graphicThe Korea-United States Air Quality (KORUS-AQ) Campaign[05.09.2017]
The GEOS-5 forecast model was used for near real time meteorological and aerosol forecasting and flight planning during the KORUS-AQ campaign. Evaluation of GEOS-5 against observations from the campaign will help to identify inaccuracies in the model's physical and chemical processes in the KORUS-AQ region and lead to refinements of the GEOS system.

» Read Brief (PDF).
thumbnail of figure graphicQuantifying chemical ozone loss in the Arctic stratosphere with GEOS-STRATCHEM Data Assimilation System[04.19.2017 ]
A new configuration of the Goddard Earth Observing System Data Assimilation System was used with a stratospheric chemistry model to study ozone depletion in the Arctic polar stratosphere during the exceptionally cold (in the stratosphere) winters 2015/2016 and 2010/2011.

» Read Brief (PDF).
thumbnail of figure graphicSynoptic Scale Influences on Increasing Summertime Extreme Precipitation Events in the Northeastern United States[02.27.2017 ]
Over the past 15 years, the northeastern United States has seen a statistically significant increase in the frequency of extreme precipitation events that is larger and more widespread than anywhere else in the country. This increase in events is more likely to be associated with frontal and low-pressure systems, rather than being caused by more tropical cyclones impacting the region.

» Read Brief (PDF).


thumbnail of figure graphicSouthern Polar Ozone in MERRA-2[08.25.2016 ]
MERRA-2 provides a good representation of the year-to-year variations and the long-term changes in total ozone column over Antarctica for the entire data record, beginning in 1980. When MLS data are introduced into MERRA-2 in 2004, agreement with independent data improves compared to earlier years when the SBUV observations were assimilated.

» Read Brief (PDF).

» Related Animation: Total Ozone from 1980 to 2015.

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