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What are the major differences between GOFS 3.1 and GOFS 3.0? |
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Global Ocean Forecasting System (GOFS)
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GOFS 3.1 |
GOFS 3.0 |
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| HYCOM source code |
2.2.99DHMTi |
2.2.19 |
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| Equation of state |
17-term |
7-term |
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| Layers |
41, nine additional layers near the surface, top 14 layers are always sigma-z so that water shallower than 84 m is always in fixed coordinates |
32 |
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| Surface wind forcing |
Reads in 10 m wind velocities and calculates wind stress using HYCOM SST and also taking into account HYCOM surface currents |
Reads in wind stress that is calculated off-line using bulk parameterization |
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| Surface radiation forcing |
Uses downward shortwave and longwave radiation |
Uses net shortwave and longwave radiation |
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| Ocean turbidity |
Based on monthly chlorophyll climatology |
Based on photosynthetically available radiation |
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| Initialization |
From GDEM4 climatology |
From Polar Science Center Hydrography |
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| SSS relaxation |
Weaker in GOFS 3.1 and turned off completely when HYCOM SSS is more than 0.5 psu away from climatology |
Stronger than GOFS 3.1 |
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| Ice model |
Full two-way coupling with the Community Ice CodE (CICE) |
Energy-loan ice model |
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| Downward projection |
ISOP |
MODAS |
For more detailed information, see the GOFS 3.1 Validation Test Report. |
