동해 내부조석의 계절 변동성

Title
동해 내부조석의 계절 변동성
Alternative Title
Seasonal effects on internal tides in the East/Japan Sea
Author(s)
전찬형; 박재훈; Sergey Varlamov; Jong-Hwan Yoon; 박영규; 김영호; 서성봉; 민홍식; 이재학
KIOST Author(s)
Park, Young Gyu(박영규)Seo, Seongbong(서성봉)Lee, Jae Hak(이재학)
Alternative Author(s)
전찬형; 박재훈; 박영규; 김영호; 서성봉; 민홍식; 이재학
Publication Year
2013-04-24
Abstract
Analyses of 2-year-long real-time ocean forecasting system outputs operated byKyushu University reveal a remarkable seasonal change of semi-diurnal internal tides in theEast/Japan Sea. Energetic semi-diurnal internal tides are generated around the northern mouthof Korea Strait where the continental shelf slope exists and the barotropic tides meet thesudden depth change nearly normally. The simulated amplitude and phase of semi-diurnalinternal tides agree well with two time series of 25-hour CTD castings in hourly intervalobtained during spring and neap tidal periods on the continental shelf slope. Converted energyfrom barotropic to baroclinic (internal) tides shows a significant seasonal signal due tostratification changes near the internal tide generation region. Generated internal tide energytravels far to the northern part of the East/Japan Sea during summer but not during winter.Propagating distance of internal tide energy appears to be associated with not only itsgeneration intensity but also its wavelength. Longer (shorter) wavelength during summer(winter) makes internal tide energy dissipates less (more). Internal tides can contribute oceanmixing through its breaking in far field as well as near field. Our result provides an exampleimplying that spatio-temporal variation of internal-tide-induced mixing due to the seasonalityof its generation, propagation, and dissipation should be around the northern mouthof Korea Strait where the continental shelf slope exists and the barotropic tides meet thesudden depth change nearly normally. The simulated amplitude and phase of semi-diurnalinternal tides agree well with two time series of 25-hour CTD castings in hourly intervalobtained during spring and neap tidal periods on the continental shelf slope. Converted energyfrom barotropic to baroclinic (internal) tides shows a significant seasonal signal due tostratification changes near the internal tide generation region. Generated internal tide energytravels far to the northern part of the East/Japan Sea during summer but not during winter.Propagating distance of internal tide energy appears to be associated with not only itsgeneration intensity but also its wavelength. Longer (shorter) wavelength during summer(winter) makes internal tide energy dissipates less (more). Internal tides can contribute oceanmixing through its breaking in far field as well as near field. Our result provides an exampleimplying that spatio-temporal variation of internal-tide-induced mixing due to the seasonalityof its generation, propagation, and dissipation should be
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/27136
Bibliographic Citation
The 17th PAMS Meeting 2013, pp.513, 2013
Publisher
PAMS
Type
Conference
Language
English
Publisher
PAMS
Related Researcher
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse