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GEOPHYSICAL RESEARCH LETTERS,
VOL. 35,
L04610,
5 PP., 2008
doi:10.1029/2007GL032807
Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere–ocean GCM
Earth Simulator Center, Japan Agency for Marine–Earth Science and Technology, Yokohama, Japan
Earth Simulator Center, Japan Agency for Marine–Earth Science and Technology, Yokohama, Japan
Earth Simulator Center, Japan Agency for Marine–Earth Science and Technology, Yokohama, Japan
Earth Simulator Center, Japan Agency for Marine–Earth Science and Technology, Yokohama, Japan
Laboratoire de Physique des Océans, Institut Français de Recherche pour l'Exploitation de la Mer, Plouzané, France
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.
Received 27 November 2007; accepted 24 January 2008; published 27 February 2008.
Citation: (2008), Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere–ocean GCM, Geophys. Res. Lett., 35, L04610, doi:10.1029/2007GL032807.
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