Taro Kakinuma and Keisuke Nakayama
Release Date: July 10, 2007

A numerical study on internal waves induced by a typhoon around a continental shelf

Taro Kakinuma1) and Keisuke Nakayama2)

1) Institute of Science and Technology, Kanto Gakuin University
2) Department of Civil Engineering, Kitami Institute of Technology

(Received: April 30, 2007)
(Accepted for publication: July 5, 2007)

Abstract:
Three-dimensional simulation of offshore currents induced by a traveling typhoon of strong winds and low pressure was performed assuming initial two-layer stratification of the sea water. The typhoon generates horizontal circulation involving divergence due to the Coriolis force, resulting in vertical circulation, which flows through the density interface. Accordingly, part of the interface is raised. The interface shows a wave train, which has the near-inertial period and propagates onshore at almost the same velocity as the passing velocity of the typhoon. The interfacial waves show their largest wave height just in front of the edge of the continental shelf, after which they separate into three components: transmitted, reflected, and orthogonal waves. The orthogonal waves turn left over the shelf edge in the northern hemisphere.

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To cite this article:
Taro Kakinuma and Keisuke Nakayama: “A numerical study on internal waves induced by a typhoon around a continental shelf”, SUISUI Hydrological Research Letters, Vol. 1, pp.1-4, (2007) .

doi:10.3178/suisui.1.1
JOI JST.JSTAGE/suisui/1.1
Copyright (c) 2007 Japan Society of Hydrology and Water Resources