Physics
Scientific paper
Feb 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3504610k&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 4, CiteID L04610
Physics
7
Oceanography: Physical: Internal And Inertial Waves, Oceanography: Physical: Turbulence, Diffusion, And Mixing Processes (4490), Oceanography: General: Numerical Modeling (0545, 0560)
Scientific paper
In order to investigate the deep ocean inertia-gravity waves, a high-resolution global coupled atmosphere-ocean simulation is carried out with a coupling interval of 20 minutes. Large (~10-3 m s-1) root-mean-square variability of vertical velocity is found in middepths (2000-4000 m), which is not reported in previous studies using realistic ocean simulations. Horizontal distribution of the large variability roughly corresponds to the wintertime atmospheric storm tracks and is stretched equatorward due to β-dispersion in open ocean with some ``shadow regions'' behind the obstacles. Frequency spectrum of vertical velocity has strong peaks at around f and 2f (f is the local inertial period) in midlatitudes, and has additional peak at around (3/2)f or 3f at some points. These results suggest necessity of re-evaluation of wind-induced near-inertial energy with high-frequency atmospheric forcing.
Klein Patrice
Komori Nobumasa
Ohfuchi Wataru
Sasaki Hideharu
Taguchi Bunmei
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