北海道大学水産科学研究彙報 = Bulletin of Fisheries Sciences, Hokkaido University;第72巻 第1号

FONT SIZE:  S M L

網走沖の陸棚-海盆境界域における dense Soya Current Water の力学的役割

千葉, 彩;磯田, 豊

Permalink : http://hdl.handle.net/2115/86615
JaLCDOI : 10.14943/bull.fish.72.1.1
KEYWORDS : Okhotsk Sea;dense Soya Current Water (DSCW);model experiments;shelf waves;coastal jet

Abstract

The mechanical role of dense Soya Current Water (DSCW) responsible for a flow pattern in the boundary region between shelf and basin areas off Abashiri is investigated using a multi-layer model. Observations in summer show significant downwelling of modified DSCW inside the steep slope of basin area. This study finds a water column of DSCW trapped on the slope like as the barotropic adjustment. According to conservation of potential vorticity, a strong positive vorticity is produced by vortex stretching when DSCW is pushed out from shallower shelf to deeper basin. This causes the generation and propagation of shelf waves to occur a coastal jet along the shelf slope.

FULL TEXT:PDF