Status and Ongoing Developments of In-situ and Satellite Data Assimilation in the NASA GMAO’s GEOS System

The Goddard Earth Observing System (GEOS) developed at NASA Global Modeling and Assimilation Office (GMAO) produces operational-quality products to support NASA’s Earth Science missions and diverse user communities, by combining advanced GEOS atmospheric model with a wide range of observations from various observing systems. While progress has been made in increasing model resolution and improved physics, the GMAO continuously enhances observation usage and develops new methods to advance the GEOS capabilities and performance. The GEOS Forward Processing (FP) system for real-time NWP is routinely upgraded, and efforts are also underway to assimilate new observations and prepare for future observing systems. The latest advancements in observation usage have also been incorporated into the GMAO’s newly implemented MERRA-21C. Meanwhile, GMAO has completed the transition, testing and validation of all operational observations used in the GEOS-FP to the JEDI. A cycled JEDI-based GEOS version is expected to be released this year.