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A reanalysis of
ocean climate





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  Gena Chepurin
  Jim Carton

global ocean heat content

Global ocean heat content anomaly relative to the 1980-2009 average (0/700m) for three SODA3 ensemble members forced by three different meteorological reanalyses. Units are 1024J. Results from the nomodel UK METOFFICE EN4.1.1 are included for comparison.

SODA uses a simple architecture based on community standard codes with resolution chosen to match available data and resolvable scales of motion. Agreement with direct measurements (to within observation error estimates) as well as climatological statistics is expected. SODA remains a research project, but we want to provide you with climate time-scale ocean reanalysis to complement the near-realtime meteorological and oceanographic products available elsewhere (NOAA/EMC, NASA/GMAO, Mercator, or BMRC, for example). If you contact us and don't get a response please keep trying!

NEWS 10July, 2016 The first releases of the latest version of the Simple Ocean Data Assimilation ocean/sea ice reanalysis, SODA3, will be available from this website beginning in August. SODA3 uses GFDL MOM5/SIS numerics at 1/4°x1/4°x50lev, similar to the ocean component of the GFDL CM2.5 coupled climate model. The Optimal Interpolation filter augmented with bias correction also represents significant improvements over previous SODA releases.

SODA3 is provided remapped onto a 1/2°x1/2°x1mo horizontal grid similar to SODA2, but with expanded vertical resolution. Higher resolution 1/4°x1/4°x5dy fields are also downloadable. Initially there will be a three member ensemble of SODA3 reanalyses each spanning the 36-year period 1980-2015:

The average of the three provides a best estimate while the spread provides information regarding the uncertainty due to errors in surface forcing. Accompanying simulations with no updating (exact solutions) will also be provided, along with the corrected forcings. Additional ensemble members will follow as well as results from ensemble-SODA. Building on the results of this work we expect to progress back in time to produce reanalysis spanning the early and mid-20th century.

Acknowledgements SODA relies on extensive collaborations. In addition to the National Science Foundation we owe debts to: the NOAA/GFDL, NOAA/NCEP, NOAA/NESDIS and in particular the Laboratory for Satellite Altimetry and NCEI, and NASA/GMAO and the NASA Physical Oceanography program. Many individuals have contributed to SODA including: Tim Boyer, Gil Compo, Dick Dee, Eric Hackert, Sirpa Hakkinen, Sasha Ignatov, Eugenia Kalnay, Syd Levitus, Matt Maltrud, Julie McClean, Laury Miller, Steve Penny, R. Raghunath, James Reagan, Tony Santorelli, Mike Steele, and most notably Ben Giese, Xianhe Cao, and Hank Seidel.

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