Internal Tide-Induced Enhancement of Cold Water Intrusion on the Continental Shelf of the Korea Strait SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 1 time in Scopus
Title
Internal Tide-Induced Enhancement of Cold Water Intrusion on the Continental Shelf of the Korea Strait
Author(s)
Park, Jae-Hun; Kim, Ye Sol; Lee, Ho Jin; Lee, Hee-Yeol; Ha, Ho Kyung; Park, Young-Gyu; Jeon, Chanhyung; Hirose, Naoki
KIOST Author(s)
Park, Young Gyu(박영규)
Publication Year
2016-03
Abstract
The Korea Strait bottom cold water (KSBCW), characterized by its temperature < 10 degrees C, is believed to originate from the deep basin of the southwestern East/Japan Sea with a maximum transport in August/September. Although previous studies have suggested possible causes of the enhanced KSBCW intrusion in summer, its mechanism is not yet clear. Here we investigate if tides can affect the strength of KSBCW intrusion using numerical simulations. We utilize a high-resolution regional ocean model with 1/108 degrees grids, covering the Korea Strait and the southwestern East/Japan Sea. Numerical simulations are conducted for several cases, which include semidiurnal tides (M-2+S-2), diurnal tides (K-1+O-1), and wind forcings differently to examine their effects on the intrusion. Simulation results reveal that the energetic semidiurnal internal tides, generated around the continental shelf in the northern part of the Korea Strait, can induce the KSBCW intrusion by the internal tidal pumping effect. Two cases including the four major tides reproduce at best a dome-shaped bottom cold water lower than 10 degrees C impinging on the slope southeast coast of Korea, consistent with historical monthly-mean temperature fields. Long-term ferry boat ADCP measurements (> 10 years) across the Korea Strait show that southwestward KSBCW intrusions get stronger 2-3 days after spring tides in summer and fall when the semidiurnal internal tides are strengthened, supporting our simulation results. We therefore propose that the maximum KSBCW intrusion in August/September is caused by the energetic semidiurnal internal tides.
ISSN
0749-0208
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2234
DOI
10.2112/SI75-109.1
Bibliographic Citation
JOURNAL OF COASTAL RESEARCH, pp.542 - 546, 2016
Publisher
COASTAL EDUCATION & RESEARCH FOUNDATION
Subject
TSUSHIMA WARM CURRENT; SEA
Keywords
Korea Strait bottom cold water; internal tide; numerical simulation
Type
Article
Language
English
Document Type
Article; Proceedings Paper
Publisher
COASTAL EDUCATION & RESEARCH FOUNDATION
Related Researcher
Research Interests

ocean circulation,ocean mixing,marine debris,해양순환,해양혼합,해양부유물

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