동해 울릉분지에서의 수직혼합

Title
동해 울릉분지에서의 수직혼합
Alternative Title
Vertical mixing in the Ulleung Basin in the East Sea
Author(s)
장성태; 이재학; 신창웅; 홍창수
KIOST Author(s)
Lee, Jae Hak(이재학)Shin, Chang Woong(신창웅)
Publication Year
2007-11-01
Abstract
In order to investigate mixing in the Ulleung Basin in the East Sea, the Korea Ocean Research and Development Institute conducted a hydrographic survey which included turbulence measurements using the R/V Eardo in September 2006 and March 2007. In 2006, a small warm eddy characterized by homogeneous 10° C water appeared at 100 - 200 m depth in the region southwest of Ulleungdo. Sea surface temperature was lower near the coast of Dok Island (Dokdo) compared to the outer area, indicating mixing near the island in March 2007. Microstructureprofiling measurements were carried out at 26 stations in the Ulleung Basin and at 10 stations between Ulleungdo and Dokdo, respectively. The dissipation rate of turbulent kinetic energy (ε) is used to estimate the diapycnal eddy diffusivity. The largest value of ε, 1×10-5 Wkg-1, appears in the surface layer. The stability in the thermocline is very strong, even though it takes much more energy to displace a particle of water. It is characterized by a high value of the Brunt-Väisälä frequency, 1×10-4 s-1, and high ε in the thermocline is measured. This high ε in the thermoclineseems to be caused by internal waves. Higher eddy diffusivity of 5×10-3 m2 s-1 is calculated at a station near Dokdo which probably results from the island effect of Dokdo.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/30256
Bibliographic Citation
PICES Sixteenth Annual Meeting, pp.219, 2007
Publisher
PICES
Type
Conference
Language
English
Publisher
PICES
Related Researcher
Research Interests

Ocean Circulation,Watermass Analysis,Climate Change,해양순환,수괴분석,기후변화

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