National Aeronautics and Space Administration

Goddard Space Flight Center

The GMAO Research Site

The Global Modeling and Assimilation Office (GMAO) supports NASA's Earth Science mission. Activities in Earth System modeling and data assimilation aim to maximize the impact of satellite observations on analyses and predictions of the atmosphere, ocean, land and cryosphere.

Science Snapshots

Science Snapshot Archive »

A New Minimum in Southern Hemisphere Sea Ice Extent

In 2023, the sea ice cover surrounding Antarctica reached its seasonal low on February 19 of just under 1.8 million square km.

A New Generation of GMAO Apps in Google Earth Engine

NASA’s GEOS composition forecast (GEOS-CF; Keller et al., 2021;) provides daily historical estimates and 5-day forecasts of a suite of atmospheric chemistry and meteorology parameters.

Health Impacts from Wildfires in 2021 Over North America

Extreme PM2.5 concentrations over North America during summer of 2021, largely driven by wildfire emissions (Figure 3), are associated with the highest respiratory morbidity risks (up to 90%) among children in parts of western and northern North America.

Atmospheric Rivers: More Precipitation Saturates California

Less than one month after severe flooding, another series of North Pacific cyclones carried a wave of tropical moisture into California with similar consequences. Unlike the first event, these cyclones rode up and over a blocking high pressure system and traversed the West Coast of the United States from north to south.