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 »

GMAO Campaign Support Highlights Versatility and Range of Product Capabilities

A recently published paper from GMAO scientists shows how data assimilation of soil moisture into GEOS can help improve modeling of tropical cyclones that interact with land.

GMAO Campaign Support Highlights Versatility and Range of Product Capabilities

The GMAO has long been instrumental in a wide array of research campaigns, studies, and collaborations. See how the capabilities of GMAO provide invaluable data for mission efforts, both sub-orbital and orbital.

SAGE III/ISS Data Assimilation System Effective In Reducing Stratospheric Observational Data Gaps

With the primary tool for vital stratospheric water vapor observations set to reach the end of its life, a new data assimilation system (DAS) developed by past and current GMAO scientists can help fill in future data gaps using other existing sensors.

The Stratospheric Sudden Warming of March 2025 Abruptly Ended the NH Stratospheric Polar Vortex

A cold stratospheric polar region characterized most of the NH winter of 2024-2025, with a major final warming in early March. The GMAO's GEOS-FP and GEOS-S2S products were able to forecast and characterize the evolution of this SSW event.