Characteristics of a warm eddy observed in the Ulleung Basin in July 2005 SCOPUS KCI

Title
Characteristics of a warm eddy observed in the Ulleung Basin in July 2005
Author(s)
Shin, C.-W.
KIOST Author(s)
Shin, Chang Woong(신창웅)
Publication Year
2009
Abstract
Oceanographic survey data were analyzed to understand the characteristics of a warm eddy observed in the Ulleung Basin in July 2005. The temperature distribution at 200 db and vertical sections provided evidence of the warm eddy in the Ulleung Basin (UWE05). Based on the 5°C isothermal line on 200 db temperature, the major axis was 160 km from southwest to northeast, and the minor axis was 80 km from southeast to northwest. The homogeneous layer in the thermocline of UWE05 had mean values of 10.40 °C potential temperature, 34.35 psu salinity, and 26.37 kg/m3 potential density (σθ) and provided evidence that UWE05 also existed during the winter of 2004-2005. A warm streamer initially flowed along the circumference of UWE05 and mixed with the upper central water. Two northward current cores were found on the western side of the measured current section at the central latitude of UWE05. One was the East Korean Warm Current (EKWC) and the other was the main stream of the western part of UWE05. Geostrophic transport of the upper layer (from the surface to the isopycnal surface of 26.9 σθ) was approximately 2.5 Sv in the eastern side of UWE05. However, the measured transport was twice as large as the geostrophic transport. Mass conservation of geostrophic transport was well satisfied in the upper layer. The direct current measurements and geostrophic transport analysis showed that the EKWC meandered around UWE05.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4363
DOI
10.4217/OPR.2009.31.4.283
Bibliographic Citation
Ocean and Polar Research, v.31, no.4, pp.283 - 296, 2009
Subject
current meandering; eddy; geostrophic flow; homogeneous medium; oceanic current; salinity; thermocline; volume transport; water temperature; Pacific Ocean; Sea of Japan; Ulleung Basin
Keywords
Homogeneous layer; Meandering; Ulleung warm eddy; Volume transport; Warm streamer
Type
Article
Language
English
Document Type
Article
Related Researcher
Research Interests

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

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