Abstract
On a simple model, residual currents of the North Sea, resulting from M2-tide and a wind stress constant in time and space, have been calculated. The results are compared with the measured propagation of Cs137. The measurements are reproduced qualitatively with a mean wind stress of 0,3 dyn/cm2 for all wind directions between West and South. The model permits to estimate a mean isotropic exchange coefficient in the coastal regions of the southern part of the North Sea. It is within the order of magnitude of 10 to 50 m2/s. © 1975 Deutsches Hydrographisches Institut.
