동해 반일주조 내부조석의 계절 변동성

Title
동해 반일주조 내부조석의 계절 변동성
Alternative Title
Seasonal variation of semi-diurnal internal tides in the East/Japan Sea
Author(s)
전찬형; 박재훈; Sergey M. Varlamov; Jong-Hwan Yoon; 김영호; 서성봉; 박영규; 민홍식; 이재학
KIOST Author(s)
Seo, Seongbong(서성봉)Park, Young Gyu(박영규)Lee, Jae Hak(이재학)
Alternative Author(s)
전찬형; 박재훈; 김영호; 서성봉; 박영규; 민홍식; 이재학
Publication Year
2014-02-26
Abstract
Seasonal variation of semi-diurnal internal tides in the East/Japan Sea is studied using 2-year-long outputs from a real-time ocean forecasting system. The model generates energetic internal tides around the northern mouth of Korea Strait. The simulated amplitude and phase of internal tides agree well with two hourly-interval 25-hour-long CTD castings obtained at a site close to the generation region during spring and neap tidal periods. Converted energy from barotropic to baroclinic tides has seasonal variation ranging 0.4− 0.5 GW during summer and 0.1− 0.2 GW during winter due to stratification changes near the southwestern East/Japan Sea. The internal tides travel far to the northern part of the East/Japan Sea during summer but not during winter. Propagating distance of internal tide energy can be explained with both generation intensity and wavelength. Longer wavelength during summer makes internal tide energy dissipates less. Our result provides a case implying that spatio-temporal variation of internal-tide-induced mixing due to the seasonality of its generation, propagation, and dissipation should be considered to simulate more realistic water mass and circulation in the East/Japan Sea.The simulated amplitude and phase of internal tides agree well with two hourly-interval 25-hour-long CTD castings obtained at a site close to the generation region during spring and neap tidal periods. Converted energy from barotropic to baroclinic tides has seasonal variation ranging 0.4− 0.5 GW during summer and 0.1− 0.2 GW during winter due to stratification changes near the southwestern East/Japan Sea. The internal tides travel far to the northern part of the East/Japan Sea during summer but not during winter. Propagating distance of internal tide energy can be explained with both generation intensity and wavelength. Longer wavelength during summer makes internal tide energy dissipates less. Our result provides a case implying that spatio-temporal variation of internal-tide-induced mixing due to the seasonality of its generation, propagation, and dissipation should be considered to simulate more realistic water mass and circulation in the East/Japan Sea.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26417
Bibliographic Citation
Ocean Sciences Meeting 2014, pp.1, 2014
Publisher
AGU
Type
Conference
Language
English
Publisher
AGU
Related Researcher
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