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 »

Historic 2024 South American Wildfires Season Rages

Wildfires scorched vast swaths of South America this year, with parts of Brazil and Bolivia being particularly hard hit. See how GEOS products visualize the historic fire season.

Hurricanes Helene and Milton Showcase the Range of Tropical Cyclone Hazards

Hurricanes Helene and Milton both affected the southeastern United States with devastating impacts, yet the characteristics of each storm varied significantly. GMAO systems highlight the differences between the two.

Evaluation of Vertical Patterns in Chlorophyll‐A Derived From a Data Assimilating Model of Satellite‐Based Ocean Color

A a recently published paper by Lionel Arteaga and Cecile Rousseaux summarizes a data-assimilation approach to analyze vertical profiles of chlorophyll using satellite data, as opposed to in-situ measurements. See how their process works.

The Hottest July on Earth as Analyzed by MERRA-2

In July 2024, NASA announced that a new record had been set for the hottest day on Earth according to NASA data, including analyses from GEOS products. Find out how this benchmark was measured and monitored.