Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3224614v&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 24, CiteID L24614
Physics
9
Oceanography: Physical: Currents, Oceanography: Physical: Coriolis Effects, Oceanography: Physical: Overflows, Oceanography: Physical: Internal And Inertial Waves
Scientific paper
In the ocean outside areas of dense-water formation, coherent vertical motions (w) are generally much weaker (~10-3) than horizontal (u, v) ones. According to theoretical models based upon ``the traditional approximation'', i.e. where the horizontal component of the Coriolis force is neglected, describing inertio-gravity waves in the ocean interior, this holds especially for motions at the inertial frequency f: w(f) < O(10-2(u(f),v(f))). We present observations of significant w(f), with mean values of 10-1(u(f),v(f)) and occasional values of 1(u(f),v(f)), from the deep Western Mediterranean Sea characterized by very small buoyancy frequency N = 0 +/- 0.4f. Our observations also present evidence of vertical propagation of internal waves, originated in the near-surface density stratified layers, through homogeneous layers below. The observations could be interpreted only within the framework of ``non-traditional approach'' with the horizontal component of the Coriolis force fully taken into account.
Millot Claude
van Haren Hans
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