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SODA: a reanalysis of ocean climate


Project Goal

The goal of the Simple Ocean Data Assimilation (SODA) project is to reconstruct the historical physical (and eventually biogeochemical) history of the ocean back (eventually) to the beginning of the 20th century. As its name implies, SODA uses a simple architecture based on community standard codes with resolution chosen to match available data and the scales of motion that are resolvable. Agreement with direct measurements (to within observational error estimates) as well as unbiased statistics are expected. While SODA remains a university-based research project, we want to be helpful to users by providing a reliable, well-documented, source of seasonal climate time-scale ocean reanalysis to complement the atmospheric reanalyses available elsewhere.

Our current goal is to improve the ocean/sea ice reanalysis by improving the quality of the forecast model. We are exploring the impacts of improved (eddy-resolving) horizontal and vertical resolution, improved meteological forcing, and tidal mixing. To simplfy development we've begun by exploring a hierarchy of regional reanalyses for the Arctic polar cap, beginning with RARE1 (nominal 0.1℃ resolution) and continuing with RARE2 (nominal 0.05℃ resolution). What we learn from developing RARE will then be applied to the SODA4 global ocean/ice reanalysis project.

Dept._AOSC             Credit: Molly Carton 10/11/2020