Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere-ocean GCM

Nobumasa Komori; Wataru Ohfuchi; Bunmei Taguchi; Hideharu Sasaki; Patrice Klein

doi:10.1029/2007GL032807

Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere-ocean GCM

Nobumasa Komori^*, Wataru Ohfuchi, Bunmei Taguchi, Hideharu Sasaki, Patrice Klein

^*Corresponding author for this work

Earth System Science

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

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.

Original language	English
Article number	L04610
Journal	Geophysical Research Letters
Volume	35
Issue number	4
DOIs	https://doi.org/10.1029/2007GL032807
State	Published - 2008/02/28

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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Cite this

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title = "Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere-ocean GCM",

abstract = "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.",

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T1 - Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere-ocean GCM

AU - Komori, Nobumasa

AU - Ohfuchi, Wataru

AU - Taguchi, Bunmei

AU - Sasaki, Hideharu

AU - Klein, Patrice

PY - 2008/2/28

Y1 - 2008/2/28

N2 - 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.

AB - 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.

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Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere-ocean GCM

Abstract

ASJC Scopus subject areas

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