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

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...

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Bibliographic Details
Main Authors: 千葉, 彩, 磯田, 豊
Format: Article in Journal/Newspaper
Language:Japanese
Published: 北海道大学大学院水産科学研究院
Subjects:
Okhotsk Sea
dense Soya Current Water (DSCW)
model experiments
shelf waves
coastal jet
600
Okhotsk
okhotsk sea
Online Access:http://hdl.handle.net/2115/86615
https://doi.org/10.14943/bull.fish.72.1.1
Description
Summary: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.

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