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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40033

Title: Spatial-Temporal Scales of Green Island Wake Due to Passing of Kuroshio
Authors: Shih-Jen Huang;Chung-Ru Ho;Sheng-Lin Lin;Shin-Jye Liang
Contributors: 國立臺灣海洋大學:海洋環境資訊學系
Date: 2014-06
Issue Date: 2017-01-12T06:06:56Z
Publisher: International Journal of Remote Sensing
Abstract: Abstract: The Kuroshio current-induced island wake downstream of Green Island, Taiwan, is studied using satellite imagery and a depth-averaged shallow-water model. Spatial–temporal scales, such as aspect ratio, dimensionless width, and Strouhal number, as well as propagation speed of the vortices, are quantified for Reynolds numbers 100, 200, and 500, respectively. It is found that the aspect ratio is between 1.76 and 2.72 obtained from satellite images and between 3.50 and 3.72 from numerical simulations. The dimensionless width is in the range of 1.84 to 1.92 from satellite images, and 1.29 to 1.33 from numerical modelling. The Strouhal number is between 0.17 and 0.20 from numerical simulations. Computed results are compared with theory, available satellite imagery, and in situ measurements, and show reasonable agreement. The magnitude of the propagation speed of the vortices is found to be of the same order as that of the Kuroshio, implying non-linearity as well as interactions of vortices, and the Kuroshio is strong. The Coriolis force affects the free-surface distribution, but its effect on vortices and flow field is insignificant.
Relation: 35(11)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/40033
Appears in Collections:[海洋環境資訊系] 期刊論文

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