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01683 am a22002173u 4500 |
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271 |
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|a Willebrand, Jürgen
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|a Barnier, Bernard
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|a Böning, Claus
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|a Dieterich, Christian
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|a Killworth, Peter D.
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|a Le Provost, Christian
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|a Jia, Yanli
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|a Molines, Jean-Marc
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|a New, Adrian L.
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|a Circulation characteristics in three eddy-permitting models of the North Atlantic
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|c 2001.
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|u https://eprints.soton.ac.uk/271/1/NEW_overview.pdf
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|a A systematic intercomparison of three realistic eddy-permitting models of the North Atlantic circulation has been performed. The models use different concepts for the discretization of the vertical coordinate, namely geopotential levels, isopycnal layers, terrain-following (sigma) coordinates, respectively. Although these models were integrated under nearly identical conditions, the resulting large-scale model circulations show substantial differences. The results demonstrate that the large-scale thermohaline circulation is very sensitive to the model representation of certain localised processes, in particular to the amount and water mass properties of the overflow across the Greenland-Scotland region, to the amount of mixing within a few hundred kilometers south of the sills, and to several other processes at small or sub-grid scales. The different behaviour of the three models can to a large extent be explained as a consequence of the different model representation of these processes.
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