Preliminary Results from the GEOS/JEDI Weakly Coupled Data Assimilation Workflow

NASA's Global Modeling and Assimilation Office (GMAO) is currently working towards the next major global reanalysis (MERRA-3). This coupled system will be mainly based on Joint Effort for Data Assimilation Integration (JEDI), including an analysis of ocean and sea ice fields. As part of the preparations for MERRA-3, GMAO’s GEOS coupled forecast model is being transitioned to MOM6 for the ocean and CICE6 for sea ice, and the respective data assimilation systems are being assembled. GMAO plan to use Joint Center for Satellite Data Assimilation (JCSDA)’s SOCA system for marine data assimilation. To start evaluating SOCA, it is necessary to build the infrastructure for cycling the coupled GEOS model. Currently, GMAO is developing a novel coupled cycling data assimilation workflow system based on Cylc. This presentation shows the results from the ongoing developments from the cycling marine DA system. Preliminary findings suggest an improved ocean analysis state through the integration of satellite altimetry, SST, and SSS observations.