Validation Test Report for the Global Ocean Forecast System 3.5 - 1/25 degree HYCOM/CICE with Tides
NAVAL RESEARCH LAB WASHINGTON DC WASHINGTON United States
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The Global Ocean Forecast System GOFS 3.5 is comprised of the 125 deg HYbrid Coordinate Ocean Model that is two -way coupled to the Community Ice CodE in a daily update cycle assimilating real-time oceansea ice observations using the Navy Coupled Ocean Data Assimilation. GOFS predicts the oceans weather, which includes the three-dimensional ocean temperature, salinity and current structure, the surface mixed layer, the location of mesoscale features, and sea ice concentration, thickness and drift in both hemispheres. GOFS 3.5 is scheduled to replace GOFS 3.1 which is the existing operational system at Fleet Numerical Meteorology and Oceanography Center FNMOC. This report describes the system comparisons against unassimilated observations at both the nowcast time and as a function of forecast length. An ocean scorecard provides the relative performance of GOFS 3.5 vs. GOFS 3.1. Overall, GOFS 3.5 is performing equal to or better than GOFS 3.1, and is recommended to move forward for operational testing by FNMOC.
- Physical and Dynamic Oceanography