Ekman motion in shallow open sea in the presence of time-harmonic variation of water depth SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 1 time in Scopus
Title
Ekman motion in shallow open sea in the presence of time-harmonic variation of water depth
Author(s)
Jung, Kyung Tae; Kang, Hyoun-Woo; Lee, Ho Jin; Kim, Mi Kyung
KIOST Author(s)
Kang, Hyoun-Woo(강현우)
Publication Year
2007-05-15
Abstract
The time variation of the wind-induced flow in a homogeneous unbounded sea region has been analytically investigated. The time-dependent Ekman solution in a homogeneous, shallow open sea has been further extended by taking into account the time variation in water depth which might be caused by either tidal motion or change in the mixed layer thickness. The solution approach taken in this study is based on the Galerkin-eigenfunction method originally developed by Heaps [1972. On the numerical solution of three-dimensional hydrodynamical equations for tides and storm surges. Memoires de la Societe Royale des Sciences de Liege Serie 6(2), 143-180]. A series of calculations have been made with emphasis on the influence of the time variation in water depth upon the build-up of Ekman spirals in the presence of oscillatory variations in water depth. It has been found that two oscillations contribute to the wind drift current, the inertial oscillation and the depth-variation-induced oscillation; the inertial oscillation decays with time, but the depth -variation- induced oscillation remains undamped despite the presence of bottom friction. The presence of time-harmonic variation produces peculiar forms of hodograph with a curled or circular pattern according to the angular frequency of the water depth variation. (c) 2007 Elsevier Ltd. All rights reserved.
ISSN
0278-4343
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4695
DOI
10.1016/j.csr.2007.01.022
Bibliographic Citation
CONTINENTAL SHELF RESEARCH, v.27, no.9, pp.1287 - 1302, 2007
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
WAVE-INDUCED CURRENTS; INERTIAL OSCILLATIONS; WIND; MODEL; STEADY; LAYERS; OCEAN
Keywords
wind-induced flows; Ekman spiral; Galerkin-eigenfunction; shallow water
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

Marine System Modeling,Ocean Climate,Ocean Circulation,해양시스템모델링,해양 기후,해양 순환

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