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2016/03/08 14:00 Associate Prof. Yu-Lin (Eda) Chang（Institute of Marine Environmental Science and Technology, NTNU）
Seminar
Poster： ╱ Post date：2016-02-17NCU IHOS Seminar Announcemnet
Speaker：Associate Prof. Yu-Lin (Eda) Chang
Place：S-325, Science Building 1
Abstract：
Title：Effect of Mesoscale Eddies on the Taiwan Strait Current
Speaker：Associate Prof. Yu-Lin (Eda) Chang
Institute of Marine Environmental Science and Technology, NTNU
Time：03/08（Tue.）14：00
Place：S-325, Science Building 1
Abstract：
This study shows that mesoscale eddies can alter the Taiwan Strait Current. The 20-yr data-assimilated Japan Coastal Ocean Predictability Experiment 2 (JCOPE2) reanalysis data are analyzed, and the results are confirmed with idealized experiments. The leading wind-forced seasonal cycle is excluded to focus on the effect of the eddy. The warm eddy southwest of Taiwan is shown to generate a northward flow, whereas the cold eddy produces a southward current. The effect of the eddy penetrates onto the shelf through the joint effect of baroclinicity and relief (JEBAR). The cross-isobath fluxes lead to shelfward convergence and divergence, setting up the modulation of the sea level slope. The resulting along-strait current anomaly eventually affects a wide area of the Taiwan Strait. The stronger eddy leads to larger modification of the cross-shelf flows and sea level slope, producing a greater transport anomaly. The composite Sea-Viewing Wide Field-of-View Sensor chlorophyll-a (Chl-a) serves as an indicator to show the change in Chl-a concentration in the strait in response to the eddy-induced current. During the warm eddy period, the current carries the southern water of lower concentration northward, reducing Chl-a concentration in the strait. In contrast, Chl-a is enhanced because the cold eddy–induced southward current carries the northern water of higher concentration southward into the strait.
Last modification time：2016-02-17 AM 10:55
