• 한국수산과학회지
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• 제36권2호
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• pp.170-177
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• 2003

This study is to analyze the influence of the Tsushima Warm Current (TWC) on the variation of sound speed in the southern part of the East Sea. Sound speed is calculated by method of Chen and Millero (1977:, based on the CTD data measured in June of 1996. Sound speed in the central part of the TWC is about $45ms^{-1}$ more fast than that in the other regions without the TWC. Sound speed minimum layer (SML) in the TWC region exists between loom and 341 m, while it exists between 260m and 290m in the non-TWC region. SML distributes along the path of TWC over continental shelf in the coastal waters of Japan.

• 한국환경과학회지
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• 제12권9호
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• pp.943-948
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• 2003

Variation of the polar front in the East Sea is studied using temperature and dissolved oxygen data obtained from Japan Meteorological Agency from 1972 to 1999. Variation of the polar front in the East Sea has a close relation to the variation of the Tsushima Warm Current (TWC). When the TWC spreads widely in the East Sea, polar front moves northward. The spatial variation of the polar front is greater in the southwestern area of the East Sea and the northern area of Tsugaru Strait where the variation of the TWC's distribution area is greater than those in others of the East Sea. Hence, in the southeastern area of the East Sea, that is, between near Noto peninsula and Tsugaru Strait, the spatial variation of the polar front is not so wide as in the southwestern area because the flow of TWC is stable.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2004년도 춘계학술발표회
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• pp.89-92
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• 2004

포텐셜와도는 해류의 순환을 설명하는데 유용하게 활용된다. 동해에서 포텐셜와도의 분포 특성을 이용하여 쓰시마난류를 포함한 상층부의 해류순환을 설명하였다. 상층부를 표층부분과 쓰시마난류의 분포 층 그리고 수온약층 분포 수층으로 구분하였다. 극전선남쪽은 쓰시마난류가 해류순환의 중심을 형성하며, 포텐셜와도는 쓰시마난류와 극전선의 분포 특성을 잘 나타내어준다. 포텐셜와도의 분포로부터, 극전선 북쪽은 일본 분지와 그 서쪽해역의 순환 세포로 구분된다.

• 해양환경안전학회지
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• 제9권2호
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• pp.65-72
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• 2003

1996년 6월에 실시된 CREAMS 항해 관측 자료를 이용하여 동해 남부 해역의 해황을 분석하였다. 1996년은 1990년∼1999년 사이의 다른 해에 비해 동해 남부 해역에 저수온 현상이 나타났으며, 이러한 현상은 일본 연안을 따라 이동하는 쓰시마난류의 지류가 더욱더 연안에 근접하여 이동하는 것과 관련이 있다. 쓰시마난류의 분포는 수심 200m 이천의 대륙붕 위에 존재하는 core 형태의 고염분수 분포와 지형류의 분포로부터 확인된다. 해수의 안정도 계산결과로부터 고온 고염분수인 쓰시마 난류의 유입은 연안역의 연직 밀도 구조에 영향을 주게 되며, 이로 인하여 수주의 불안정한 상태를 초래하는 요인 중 한가지로 작용하는 것으로 나타난다.

• 한국해양학회지:바다
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• 제24권3호
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• pp.439-447
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• 2019

지금까지의 연구 결과를 토대로 하여 대마난류의 순환역학에 관한 몇 가지 쟁점들을 정리해 보고 향 후 해결할 문제점들을 짚어보는 기회로 삼고자 하였다. 주요 관심 사항은 대마난류의 형성, 그 수송량의 계절변동 및 동해 내부에서의 분지 현상이다. 대마난류는 북태평양 아열대순환의 일부로서 북태평양 전지구적 바람장에 의해 형성된다. 그러나 마찰, 만의 지형, 장벽효과 등에 따라 그 수송량은 민감하게 변한다. 수송량의 계절변동에 대해서는 여러 학자들에 의해 많은 요인들이 제시되어 왔으나 아한대 바람장이 이와 가장 밀접히 연관되어 있는 것으로 밝혀졌다. 그러나 향후, 아한대 바람장 뿐만 아니라 아열대 바람장까지를 포함한 북태평양 전체 바람장과의 관계를 보여줄 수 있는 연구가 필요해 보인다. 대마난류의 두 분지인 동한난류와 일본연안류의 형성 기작으로서 그동안 서안강화 현상과 해저지형 효과가 가장 유력하게 제시되어 왔다. 그러나 서안강화는 동한난류의 계절변동을 설명할 수 없다는 문제점을 갖고 있음으로 이를 대체할 다른 기작에 대한 연구가 필요하다고 사료된다.

• Ocean and Polar Research
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• 제35권2호
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• pp.127-134
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• 2013

In this study we investigated changes in the Tsushima Warm Current (TWC) under the global warming scenario RCP 4.5 by analysing the results from the World Climate Research Program's (WCRP) Coupled Model Intercomparison Project Phase 5 (CMIP5). Among the four models that had been employed to analyse the Tsushima Warm Current during the 20th Century, in the CSIRO-Mk3.6.0 and HadGEM2-CC models the transports of the Tsushima Warm Current were 2.8 Sv and 2.1 Sv, respectively, and comparable to observed transport, which is between 2.4 and 2.77 Sv. In the other two models the transports were much greater or smaller than the observed estimates. Using the two models that properly reproduced the transport of the Tsushima Warm Current we investigated the response of the current under the global warming scenario. In both models the volume transports and the temperature were greater in the future climate scenario. Warm advection into the East Sea was intensified to raise the temperature and consequently the heat loss to the air.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 추계학술발표회
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• pp.167-174
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• 2003

Oceanic conditions of the Tsushirm Wann Current (1WC) region in the southern area if the East Sea (the Japan Sea) are examined using data obtained from a CREAMS (Circulation Research if the East Asian Marginal Seas) cruise in June 1996. In 1990s, a lower temperature appears in $19\%$ and in this period, two branch of the TWC exist and the first branch of the TWC flows inshore if the Japanese coastal region compared to tfr1t in the other years, especially in the sfr1llower water layer at less th:1n about 2mm. The TWC cored with the higher salinity (>34.6 psu) is clearly observed over the continental shelf zone in the Japanese coastal region and offshore and identified by geostrophic calculation Intrusion if the TWC into the East Sea through the Korea Strait (the Tsushima Strait) makes the density structure in the water column change and the water mass in the TWC region is unstable based on Brunt- Vaisala frequency.

• 한국해안해양공학회:학술대회논문집
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• 한국해안해양공학회 1995년도 정기학술강연회 발표논문 초록집
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• pp.16-19
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• 1995

Effects of the changes in bottom topography and non-linearity of the western boundary current on the separation position of the Tsushima Warm Current(TWC) are investigated using a primitive equation model in a simplified model domain which consists of a deep ocean, a continental shelf and a marginal sea(Fig. 1). (omitted)

• 한국환경과학회지
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• 제12권11호
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• pp.1137-1144
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• 2003

To provide evidence that the changes in oceanic environmental conditions are useful indices for predicting stock structure and distribution of the Pacific saury (Cololabis saira), the body length compositions and catch per unit fishing effort were examined in relation to the sea surface temperature(SST) anomalies in the Tsushima Warm Current(TWC) region. The size of the fish became larger(smaller) than the average in the same size category during the season of higher SST(lower SST) as opposed to the normal SST. The year-to-year changes in body size caused by the changes in the environmental conditions led the stock to be homogeneous during the period of high stock level from the late 1950s to early 1970s and in the 1990s. The changes in body size manifested by higher(lower) occurrence rates of larger (smaller) sized groups in relation to temperature anomalies suggest that the changes in the environmental conditions affect the distribution and the structure of the stock in the TWC region. Therefore, if the SST anomaly derived from satellite data is large enough in the early spring months(Mar. or Apr.), it is possible to predict whether or not sea temperature will be favorable for large sized groups of saury at normal or slightly earlier time of commencement of the fishery in spring(Apr.∼June).

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.242-243
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• 2001

Tsushima Warm Current(WD entering into the East Sea through the Korean Strait flows northeastward and during this travel it shows complicated movement like meandering and eddy. It is considered that these variations of TWC are important causes making water masses unstable and also have influence on biological and chemical properties of water masses. Lee and Cho(2000) suggested that meandering of TWC in adjacent waters of Noto peninsula has much influence on fluctuation of current structure. (omitted)