Residual vorticity induced by the action of tidal currents in combination with bottom topography in the Southern Bight of the North Sea |
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| Authors: | G J Komen H W Riepma |
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| Institution: | Department of Oceanographic Research , Royal Netherlands Meteorological Institute , KNMI, De Bilt, The Netherland |
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| Abstract: | Abstract Results are presented of calculations on the generation of residual vorticity by tidal currents over the bottom topography of the Southern Bight of the North Sea. A typical order of magnitude is 10?6 to 10?7 s ?1. This is compared with current measurements on calm days, when similar magnitudes are found. At windspeeds less than about 5 m/s tidal generation of residual vorticity is important; at higher windspeeds wind effects begin to dominate. Our results are relevant in understanding the spatial variability of residual currents, because a non-zero vorticity implies the existence of horizontal gradients in the residual current field. |
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| Keywords: | Critical levels hydromagnetic waves magnetohydrodynamics transition layer solar physics astrophysics |
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