Horizontal variability of surface currents in the Dead Sea
H.-H. ESSEN, K.-W. GURGEL, F. SCHIRMER, Z. SIRKES
Oceanologica Acta, Vol. 18, No. 4, pp. 455...467, 1995.
Abstract - -
Surface currents in the Dead Sea, as measured by two land-based HF (high
frequency) radar stations in autumn 1984, are analysed. High horizontal
variability is observed, which may partly be explained by the inhomogeneous
wind field. Decomposition into empirical orthogonal eigenfunctions (EOF) shows
that the currents may not be represented by a small number of patterns. The
forcing of currents by wind is proved through significant correlation between
both. Spatially-averaged rotary spectra provide evidence of the presence of
inertial oscillations. The data set allows the calculation of horizontal
derivatives. Time series of divergence and curl are presented. By estimating
the advective terms of the Navier-Stokes equation it is shown that nonlinear
effects are important.
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