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The ECCO 1 degree global WOCE Synthesis. The Estimated Mean State |
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A. Koehl, Y. Lu, P. Heimbach, B. Cornuelle, D. Stammer and C. Wunsch |
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for the ECCO Consortium. |
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The global time-dependent WOCE data synthesis made by the ECCO |
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Consortium over the 10-year period 1992 - 2001 aims at estimating |
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the time-dependent ocean state that is, within error bars, consistent |
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with the global data sets and the dynamics imbedded in the numerical |
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model. We compare the estimated state with the WOCE observations that |
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went into the synthesis. Overall, the agreement with the data is |
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close to consistent with the prior error statistics for |
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the data and model. The remaining misfit and a comparison |
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with the reference state provides information about the quality of |
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both the state and about and model errors. The state estimation |
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procedure is able to correct for many of the traditional shortcomings |
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of the flow field. However, as adjustments are made through changing the |
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surface boundary conditions and initial conditions only, not all deficits |
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can be properly represented. Mean meridional heat transports, |
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meridional overturning and volume transport through passages are |
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slightly reduced in comparison with the unconstrained reference run. |
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