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Development and Assessment of the ECCO2 Arctic coupled Ocean and Sea-ice model

Development and Assessment of the ECCO2 Arctic coupled Ocean and Sea-ice model. An T. Nguyen, R. Kwok, D. Menemenlis. Nov 20 2008. 40%. Normalized Cost. Data: Sea-ice velocity, sea-ice thickness, CTD profiles, Initial conditions, Forcings Parameters:

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Development and Assessment of the ECCO2 Arctic coupled Ocean and Sea-ice model

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  1. Development and Assessment of the ECCO2 Arctic coupled Ocean and Sea-ice model An T. Nguyen, R. Kwok, D. Menemenlis Nov 20 2008

  2. 40% Normalized Cost • Data: • Sea-ice velocity, sea-ice thickness, CTD profiles, • Initial conditions, Forcings • Parameters: • Salt-plume parameters, air / sea-ice drag coefficients, sea-ice and ocean albedos, sea-ice strength and H0, initial conditions, freshwater content, Gmredi • Solutions: • Baseline: A0 • Optimized: A1 Regional optimized solution:

  3. Sea ice extent data A0 A1

  4. Sea ice velocity Model minus data Passive microwave derived 1992-2002

  5. Svalbard Arctic ocean hydrography

  6. Ocean velocity: topostrophy

  7. Ocean velocity: topostrophy

  8. Atlantic Water:

  9. Arctic ocean fluxes: Bering Strait [Woodgate, 2006]

  10. Arctic ocean flux: Fram Strait

  11. Feb’92 Feb’06 Arctic ocean flux: Fram Strait

  12. Summary-1: 53% • Arctic Ocean: • Summer 2007 sea-ice minimum • Realistic Halocline • Freshwater: compatible with Serreze estimates • Berring Strait: all fluxes compatible with measurements from Woodgate [2006] • Fram Strait: all fluxes too low compared to Schauer [2006]

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