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The non-linear approach

Many of the modeling efforts in the North Sea have employed a nonlinear bottom stress of the form

with the value of the drag coefficient taken to be either .0025 or .0050, depending on the author. Many studies [62], [1], [12], [13], and [9] have used , whereas [8] and [17] have used a value of . These values were generally determined during computation of tides, from their transient behavior. In considering an application of these values for the barotropic experiments carried out here, we must consider whether the nature of the benthic boundary layer processes in the North Sea are really very different from the ones at the bottom of the GIN Sea. To really answer this question one would need to know the typical benthic boundary layer thicknesses, interior flow speeds and the size of the turbulent eddies. On first approximation it doesn't appear that these processes would be very different at a depth of 500m from those at, say 2500m, and hence the use of drag coefficients with the same magnitude appears to be warranted.