• Journal of Korean Society of Coastal and Ocean Engineers
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• v.8 no.2
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• pp.215-220
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• 1996

Seasonal and interannual variations of the oceanic condition in the surface layer of the northwestern East Sea are described. The seasonal variation shows two types in the water circulation. In the first type the East Korean Warm Current (EUC) Water are dominant in the East Korean Bay in spring, while in summer the cold water region develops as the North Korean Cold Current (NKCC) becomes strong. In the second type the cold water appears in the East Korean Bay from spring, but in summer the EKWC comes close to the coast, thus influencing the coastal cold water region. The characteristics of the interannual variation can be classified into 4 types according to the relative strength between the EKWC and the NKCC, and the paths of these currents. In each case various sizes of cyclonic cold eddies and/or anti-cyclonic warm eddies are formed frequently in the East Korean Bay.

• Journal of the Korean Association of Geographic Information Studies
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• v.8 no.3
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• pp.142-149
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• 2005

To provide observed oceanography data at coastal fish and shellfish farm in the northeastern sea of the Korean peninsula on real time base, we developed real time application system for fisheries oceanography information. The system has been made up a mooring buoy system, a server for oceanography data collection, a server for archiving data and a database system, and a web server for providing fisheries oceanography information using internet. Futhermore, to support letters service on a cellular phone, we developed the communication system from mooring buoy to cell phone on real time base. The oceanography data derived from the system are water temperature speed and direction of current in surface layer middle layer and bottom layer in hour. We were able to quantify short term variation of ocean conditions within several days at shellfish farm such as a scallop sea farm using our system. To reduce damages of fish and shellfish farm from abnormal phenomena of ocean conditions such as a broken stratification of water, an occurrence of abnormal coastal cold water and warm water we will be able to move vertically and horizontally the sea farm facilities to proper conditions using real time oceanography information derive from the system.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 1996.06a
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• pp.381-386
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• 1996

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.13 no.1
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• pp.36-41
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• 1977

• Proceedings of the Korean Environmental Sciences Society Conference
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• 1999.04a
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• pp.171-172
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• 1999

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.24 no.2
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• pp.65-70
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• 1988

A series of echo-sounding and current measurements as well as the drogue and drift bottle experiments were carried out in the mouth of the Nakdong river from April 1986 to August 1987: Several sand bars and sea channels are formed by reclaiming and dredging work in the river. The main stream of the river is separated into east and west branch channel. The tidal current speed of the west channel is faster than of the east channel in 1986, but is reverse in 1987 to that in 1986.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2007.05a
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• pp.292-293
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• 2007

한국 남해안에서 2005년 10월부터 2006년 8월까지 격월별로 관측된 CTD 자료 및 분석된 영양염 자료를 가지고 격월별 해황 및 영양염의 분포를 살펴 보았다. 겨울철에는 표층과 저층간의 수직 혼합으로 일정한 수괴 분포 및 수온과 염분에 대해서 일정한 영양염 분포를 나타내었다. 그리고 연안역과 외양역 사이에 수온 전선이 뚜렷하였다. 그러나 여름철에는 양자강 저염수의 유입으로 T-S상에서 수형의 분포 범위가 넓었으며, 또한 수온과 염분에 대한 영양염의 분포도 일정하지 않았다. 그리고 여름철에는 저염수 유입에 의해서 수온 전선보다는 염분 전선이 뚜렷하였다. 봄과 가을에는 계절적 천이기로 수온과 염분의 분포에서 뚜렷한 pattern을 보이지 않았다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.211-212
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• 2002

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 1998.06a
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• pp.107-108
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• 1998

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.38 no.1
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• pp.1-10
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• 2002

Biomass distribution of zooplankton showed its lowest level in June in the Cheju Strait, and the highest one was noticed in November when the secondary productivity is considered high. The highest biomass of zooplankton appeared in the sea areas of Sta. 14 and 11 respectively with relation to oceanographic conditions and wet weight of biomass. The positions were the center part of the Cheju Strait, while the sea area of the South Sea of Korea and the northern coast of Cheju Island showed relatively low biomass distribution. The characteristic of the sea area where biomass was densely distributed was it was in patch shape. Meanwhile, biomass distribution was higher in the northern sea area of Cheju Island than In the coastal sea of the South Sea of Korea. It shows formation of hairtail fishing grounds is closely related to biomass distribution in the Cheju Strait. In addition, high biomass is displayed in the center part of the saddle shaped ocean, a boundary of the heterogeneous water mass as a feature of fall oceanographic condition. Good fishing grounds of a hairtail In the Cheju Strait were formed outside of the sea area that showed patch-shaped high biomass distribution.