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The effect of ocean tides on a climate model simulation

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Mueller,  M.
The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Haak,  H.
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Jungclaus,  J. H.
The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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Citation

Mueller, M., Haak, H., Jungclaus, J. H., Suendermann, J., & Thomas, M. (2010). The effect of ocean tides on a climate model simulation. Ocean Modelling, 35, 304-313. doi:10.1016/j.ocemod.2010.09.001.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-F6E8-0
Abstract
We implemented an explicit forcing of the complete lunisolar tides into an ocean model which is part of a coupled atmosphere-hydrology-ocean-sea ice model. An ensemble of experiments with this climate model shows that the model is significantly affected by the induced tidal mixing and nonlinear interactions of tides with low frequency motion. The largest changes occur in the North Atlantic where the ocean current system gets changed on large scales. In particular, the pathway of the North Atlantic Current is modified resulting in improved sea surface temperature fields compared to the non-tidal run. These modifications are accompanied by a more realistic simulation of the convection in the Labrador Sea. The modification of sea surface temperature in the North Atlantic region leads to heat flux changes of up to 50 W/m2. The climate simulations indicate that an improvement of the North Atlantic Current has implications for the simulation of the Western European Climate, with amplified temperature trends between 1950 and 2000, which are closer to the observed trends. © 2010 Elsevier Ltd. All rights reserved.