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contributor authorEriksen, Charles C.
date accessioned2017-06-09T14:50:43Z
date available2017-06-09T14:50:43Z
date copyright1993/06/01
date issued1993
identifier issn0022-3670
identifier otherams-28036.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4165108
description abstractThe response of the ocean at low latitude to idealized westerly wind bursts can be described as a wave wake composed of equatorial gravity and Rossby-gravity modes. The excited waves are those with phase speeds that match the zonal translation speed of a wind burst, typically 10 m s?1. These modes sum to produce oscillations near the local inertial frequency at each latitude, analogous to near-inertial internal gravity waves generated by moving storms at midlatitude. Linear theory predicts that typical wind burst amplitudes (stresses of 0.1 Pa) will generate substantial current oscillations [O (1 m s?1)] in the upper ocean. Response is initially confined to the region directly beneath a wind burst, after which the wake descends and refracts equatorward as a propagating beam. Waves are of sufficient amplitude to dominate shear and vertical strain in the upper ocean. Phase differences between oscillations at neighboring latitudes induce motion in the meridional-vertical plane at ever-decreasing meridional scales. Mixing associated with predicted low Richardson numbers is expected to check development of nonlinearity from vertical and meridional advection by the waves.
publisherAmerican Meteorological Society
titleEquatorial Ocean Response to Rapidly Translating Wind Bursts
typeJournal Paper
journal volume23
journal issue6
journal titleJournal of Physical Oceanography
identifier doi10.1175/1520-0485(1993)023<1208:EORTRT>2.0.CO;2
journal fristpage1208
journal lastpage1230
treeJournal of Physical Oceanography:;1993:;Volume( 023 ):;issue: 006
contenttypeFulltext


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