contributor author | Eriksen, Charles C. | |
date accessioned | 2017-06-09T14:50:43Z | |
date available | 2017-06-09T14:50:43Z | |
date copyright | 1993/06/01 | |
date issued | 1993 | |
identifier issn | 0022-3670 | |
identifier other | ams-28036.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4165108 | |
description abstract | The 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. | |
publisher | American Meteorological Society | |
title | Equatorial Ocean Response to Rapidly Translating Wind Bursts | |
type | Journal Paper | |
journal volume | 23 | |
journal issue | 6 | |
journal title | Journal of Physical Oceanography | |
identifier doi | 10.1175/1520-0485(1993)023<1208:EORTRT>2.0.CO;2 | |
journal fristpage | 1208 | |
journal lastpage | 1230 | |
tree | Journal of Physical Oceanography:;1993:;Volume( 023 ):;issue: 006 | |
contenttype | Fulltext | |