北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University - 第73巻 第1号

富山湾深層における近慣性内部重力波

越後, 友利果;磯田, 豊;千手, 智晴

Permalink :  http://hdl.handle.net/2115/90245
JaLCDOI :  10.14943/bull.fish.73.1.33
KEYWORDS : Near-inertial internal gravity waves; current velocity; non-traditional f-plane; Toyama Bay

Abstract

The present study analyses current velocity data moored in Toyama Bay, where the incidence of near-inertial waves is restricted to southward propagation from the north, and provides evidence of their southward propagation from the flattened shape of the observed velocity ellipse. The results support the existence of near-inertial waves in a ‘non-traditional f-plane’ as pointed out by Echigo et al. (2022). Furthermore, the ray-path of its southward propagating near-inertial waves was found to be almost identical to the upward angle of the reflected waves and the slope gradient of the seabed near the bay-head. The rotating oscillatory currents associated with these near-inertial waves are expected to roll up the seabed mud and generate the turbidity flows.


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