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
Global Transport of Smoke from Australian Bushfires  thumbnail

Global Transport of Smoke from Australian Bushfires

The transport of the Australian bushfire smoke plumes around the global has accelerated through deep vertical transport into the upper troposphere and even the lowermost stratosphere, leading to long-range transport around the globe. [GEOS-FP animation]
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Snow Depth Variability in the Northern Hemisphere Mountains Observed From Space thumbnail

Snow Depth Variability in the Northern Hemisphere Mountains Observed From Space

Accurate snow depth observations are critical to assess water resources. Yet, remote sensing observations of mountain snow depth are still lacking at the large scale. An evaluation with in situ measurements from ~4000 sites and NASA MERRA-2 reanalysis data demonstrates that the Sentinel-1 snow depth retrievals capture the spatial variability between and within mountain ranges, as well as their interannual differences.
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GEOS Composition Forecasting System (GEOS-CF): Capabilities and complexities thumbnail

GEOS Composition Forecasting System (GEOS-CF): Capabilities and complexities

A new visualization produced by the NASA Scientific Visualization Studio (SVS) shows the complexity of the chemical system of the atmosphere as simulated by the NASA GEOS composition forecast model (GEOS-CF), produced by the GMAO.
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Assessing the Impact of Nearly 40 Years of Observations on Short-Range MERRA-2 Forecasts thumbnail

Assessing the Impact of Nearly 40 Years of Observations on Short-Range MERRA-2 Forecasts

The GMAO atmospheric assimilation system carries along with it the necessary ingredients to generate adjoint-based observation impacts. We use the adjoint of the GEOS general circulation model and the adjoint of the Gridpoint Statistical Interpolation analysis to evaluate observation impact for MERRA-2.
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