• 제목/요약/키워드: Tsushima

검색결과 375건 처리시간 0.023초

A Circulation Study of the East Sea Using Satellite-Tracked Drifters 1 : Tsushima Current

  • LEE Dong-Kyu;LEE Jae-Chul;LEE Sang-Ryong;LIE Heung-Jae
    • 한국수산과학회지
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    • 제30권6호
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    • pp.1021-1032
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    • 1997
  • Satellite-tracked drifters deployed in the East Sea since 1991 are used to study the Tsushima Current (TC). It is found that the TC is a steady current with a mean speed of 10 cm/s before it enters the East Sea. Only during the summer, the TC flows along Honshu Island with a mean speed of $30\~40\;cm/s$ and then exits through the Tsugaru Strait. In fall and winter, the TC does not follow the coast along Honshu Island but it enters into the interior of the East Sea before it reaches the Tsugaru Strait. The water that passes the West Channel of the Korea Strait mostly comes from the western East China Sea and spreads into the interior of the East Sea. It also forms the large eddies in the southern East Sea. The outflow through the Tsugaru Strait comes from the interior of the East Sea in all seasons except summer. The mean speed of the Tsugaru Strait outflow is about 60 cm/s. The largest current variability is found in the eastern central area of the East Sea, south of sub-polar front.

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Structure and Vorticity of the Current Observed Across the Western Channel of the Korea Strait in September of 1987-1989

  • Byun, Sang-Kyung;Kaneko, Arata
    • Ocean and Polar Research
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    • 제21권2호
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    • pp.99-108
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    • 1999
  • With sectional data obtained in September of 1987, 1988 and 1989 by quadrireciprocal ADCP measurement and CTD cast, the current structure, volume transport and vorticity in the Western Channel of the Korea Strait were studied. The characteristics of Tsushima Current water persisted throughout the summer especially in the homogeneous water of temperature $14-16^{\circ}C$ located at the depth of 50-100m below seasonal termocline. Thickness and velocity of the homogeneous layer are about 10-170m and 20-60cm/s. and the relative vorticity for this layer is shown to be nearly constant and it is smaller than the planetary vorticity. Potential vorticity of $2.70-7.10{\times}10^{-6}m^{-1}s^{-1}$ is found to be dependent mainly on planetary rather than on the relative vorticities. The Tsushima Current water represented by the homogeneous layer R14-16^{\circ}C$ may keep the potential vorticity at the area of strong current in the Strait. The ADCP current structure is similar to geostrophic current and the core of the current with the speed of 30-50cm/s is situated in the middle layer over the deep trough. With large tidal fluctuation the volume transport has mean value of 1.17sv which was about 40% larger than that of geostrophic calculation.

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Effect of the Environmental Conditions on the Structure and Distribution of Pacific Saury in the Tsushima Warm Current Region

  • Gong, Yeong;Suh, Young-Sang
    • 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).

비디오 게임 "고스트 오브 쓰시마"의 게임플레이-스토리의 조화성 고찰 (A Study on Ludo-narrative Harmony in the Video Game "Ghost of Tsushima")

  • 전범수
    • 한국게임학회 논문지
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    • 제21권5호
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    • pp.87-104
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    • 2021
  • 클린트 호킹이 정의한 게임 안에서 게임플레이 메카닉스와 서사의 이해관계가 상반되는 "놀이-서사의 부조화"는 많은 오픈 월드 장르 게임에서 발견되는 문제이다. 그러나 비디오 게임 "고스트 오브 쓰시마 (2020)"는 구로사와 아키라 감독의 사무라이 영화 속 서사와 캐릭터의 특징을 본떠 주인공 진 사카이의 여정을 조지프 캠벨의 "영웅의 여정"으로 정의될 수 있는 서사구조로 만들고, 이를 통해 사무라이 정신인 무사도를 주인공에게 불어넣었다. 또한 "고스트 오브 쓰시마"는 능력치 상승 시스템, 맵디자인, 사이드 퀘스트 등의 게임플레이 메카닉스가 게임 속 서사의 특징을 보조하도록 디자인함으로써, 플레이어에 의해 결정되는 주인공의 모든 행동이 게임 서사의 전제와 상충하지 않는 게임플레이와 서사의 조화를 만들어 냈다.

C. polykrikoides 적조 발생시의 한국 남해안의 수온 및 염분 분포 (Distributions of Water Temperature and Salinity in the Korea Southern Coastal Water During Cochlodinium polykrikoides Blooms)

  • 이문옥;최재훈
    • 한국해양환경ㆍ에너지학회지
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    • 제12권4호
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    • pp.235-247
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    • 2009
  • 나로도를 중심으로 한 한국 남해안에서 발생하는 C. polykrikoides 적조의 원인 규명을 위해 1995년부터 2008년까지 국립수산과학원이 조사한 정선해양관측 및 위성정보 자료에 기초하여 동계 및 하계에 있어서의 수온염분 분포의 특징을 조사하였다. C. polykrikoides 적조는 나로도 주변 해역에서의 평균 수온이 약 $25.0{\sim}26.0^{\circ}C$, 염분이 약 31.00 psu 전후일 때 가장 많이 발생하였다. 한국남해 연안수와 외해수 사이에는 동계 및 하계에 각각 서로 다른 열염전선이 관측되었다. 즉, 동계에는 저온저염의 한국남해 연안수, 쓰시마 난류계의 중간수, 고온고염의 쓰시마 난류, 저온저염의 중국대륙 연안수 사이에 네 개의 전선이 관측되었다. 반면, 하계에는 저온고염의 한국남해 연안수, 고온저염의 쓰시마 난류, 고온고염의 중국대륙 연안수 사이에 두 개의 전선이 관측되었다. 이러한 열염전선은 서로 물리적 성질이 다른 수괴에 의해 형성된다는 사실이 T-S diagram을 통해서도 확인되었다. 이상으로부터, 나로도 주변해역에서 하계에 발생하는 C. polykrikoides 적조는 한국남해 연안수와 쓰시마 난류 사이에 형성되는 열염전선과 밀접한 연관을 가지고 있음을 알 수 있었다.

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On the Cold Water Mass in the Korea Strait

  • Lim, Du Byung;Chang, Sun-duck
    • 한국해양학회지
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    • 제4권2호
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    • pp.71-82
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    • 1969
  • By use of the oceanographic data from 1932 to 1941 and from 1960 to 1967, the general properties of the cold water in the Korea Strait are discussed. This water characterized with temperatures 3-10$^{\circ}C$ and salinities 34.0-34.4 originates from the Japan Sea and begins to flow out in summer along the bottom about 8 to 18 miles southeast of Ulgi in Ulsan. It usually reaches the Pusan- Tsushima section and rarely to the west of the southernmost part of Tsushima. As it flows out, it shows rising trend along the coast of Korea and sometimes upwelling occurs in the vicinity of Ulsan. It seems that the cold water forms an under current along the bottom in summer and autumn in the western channel of the Korea Strait.

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하계 대한해협 서수도에 유입되는 Tsushima난류수의 기원-2 중층수에 대한 고찰 (In Summer, the Origin of Tsushima Warm Current Water in the Western Channel of the Korea Strait-2 on the Water in the Middle Layer)

  • 윤종휘
    • 한국항해학회지
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    • 제14권2호
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    • pp.61-76
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    • 1990
  • 하계 대한 해협 서수도에는 연직적으로 특성이 서로 다른 세개의 수괴가 존재한다. 그 중 중층수에 대하여 인접 해역의 해수 특성과 상호 비교함으로써 그 기원과 유로를 추정하였다. 그 결과, (1) 중층수는 동지나 해의 대륙붕 상에서 형성된 Kuroshio수와 중국 대륙 연안수와의 혼합수인 것으로 나타났다. (2) 중층수는 Kyushu Island 의 서쪽 해역, 경도 약 127 E 부근 해역과 제주도와 Goto Islands의 사이 해역을 거쳐 유입된 것으로 나타났다.

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On the Cold Water Mass Around the Southeast Coast of Korean Peninsula

  • An, Hui Soo
    • 한국해양학회지
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    • 제9권1_2호
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    • pp.10-18
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    • 1974
  • The cold water mass around the southeast coast of the Korean Peninsula is analyzed by using CSK data from 1966 through 1970. It is shown that this water mass flows down from the region offshore of Jukbyun to the area of Youngil Bay along the 100meter contour line of bottom topography. In ordinary summer conditions when the current velocity in the Korea Strait is usually above about 50cm/sec and the wind direction is southwest, the cold water ascends to the surface and makes the surface temperature gradient large, unless disturbed by a tropical cyclon. The bottom water of the Korea Strait is formed by the stratification after the Tsushima intermediate water and the Japan Sea intermediate water have been mixed. In winter the Tsushima intermediate water with high salinity sinks rapidly around the inlet of the Japan Sea and prevents the Japan Sea intemediate water from entering the Korea Strait.

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