• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.5
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• pp.520-524
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• 2023

Regalecus russellii, which spends most of its life in the deep sea, occasionally appears in coastal waters. However, the reasons for its appearance remain unclear. In Korea, R. russellii mainly appears along the eastern coastal waters, and most of them are caught in fishing gear, such as gill nets, or are stranded on the shore; nevertheless, the frequency of appearance is extremely low. Even if found, this species is often identified to be morphologically similar to Trachipterus ishikawae, and comprehensive analysis to identify the species through sample collection is limited. Consequently, information on the biological characteristics of R. russellii appearing in the coastal waters of Korea is scarce. Herein, the anatomical characteristics of R. russellii caught in a gill net off the Gangwon-do coast on March 14, 2023, were analyzed, and coastal water temperature was measured using an ocean buoy. Our results showed that the individual was male, its total length was 320 cm, body weight was 27.52 kg, body length was 26.62 cm, gonad weight was 619.45 g, and liver weight was 218.71 g. The stomach was full of euphausiids. The water temperature changed drastically at 15-30 m roughly a week before the R. russellii individual was caught, and the subsurface water temperature was lower than 10 ℃. Our findings provide baseline data to understand the ecological characteristics of R. russellii appearing along the eastern coast of the Korea.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.14 no.4
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• pp.229-239
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• 2009

To understand major factors that affected on distinct Cochlodinium bloom scale in Korean coasts in 2007 and 2008, oceanographic and meteorological characteristics during Cochlodinium bloom period were compared. The main reason for large scale blooms in 2007, covering both southern coast and eastern coast with about 10 million US dollars fish kills, was attributed to sufficient nutrient supply by heavy rainfall, upwelling in the coast arising from irregular wind shift, weak thermocline and low grazing pressure by zooplanktons during Cochlodimum bloom development period. On the contrary, small scale blooms in 2008 covering only inshore areas of southern coast without fish kills was attributed to the low nutrient level in coastal areas by long persistent drought and strong influence of oligotrophic offshore water onto inshore and high grazing pressure by extra ordinarily abundant zooplanktons during Cochlodinium development period. Conclusively, it was estimated that nutrient level, strength of offshore water and feeding pressure might play a significant role in the difference of bloom scale between the two years.

• Journal of the Korean Society of Marine Environment & Safety
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• v.30 no.5
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• pp.407-414
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• 2024

This study analyzed the spatiotemporal errors and limitations of LDAPS-based rainfall forecast data used in coastal ocean numerical models and verified their reliability by comparing them with the rainfall data for 2020 from three rain gauges located around Jinhae Bay, South Korea. The results indicated that although LDAPS-based rainfall data generally reproduced long-term trends, they exhibited significant discrepancies in short-term variations. The quantitative error in annual rainfall was 197.5 mm, which increased to 285.4 mm for summer, indicating that the difference in the cumulative rainfall prediction increases for seasons with high rainfall variability. Furthermore, the rainfall-time predictions exhibited a temporal delay of approximately 8 h, suggesting that temporal errors in the LDAPS-based rainfall data could significantly reduce the accuracy of coastal environment predictions. The indiscriminate use of these data, which fail to accurately reflect coastal rainfall, could lead to serious issues in predicting coastal environmental changes caused by pollutants or extreme rainfall events. Therefore, to appropriately use LDAPS-based rainfall data, it is necessary to improve their accuracy through comprehensive verifications and further refinements.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.1925-1930
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• 2006

A quasi depth-varying mathematical model for wind-generated circulation in coastal areas, expressed in terms of the depth-averaged horizontal velocity components and free surface elevation was validated and used to understand the diurnal circulation process. The wind velocity is considered as a dominant factor for driving the wind generated current. In this paper, three dimensional numerical experiments that included the land topography were used to investigate the mesoscale air flow over the coastal regions. The surface temperature of the inland was determined through the surface heat budget consideration with inclusion of a layer of vegetation. A series of numerical experiments were then carried out to investigate the diurnal response of the air flow and wind-generated circulation to various types of surface inhomogeneities.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.299-301
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• 2015

As the new notification of Ministry of Public Safety and Security on the management of coastal VTS has been effective since April $20^{th}$ this year, all pleasure ships over 2 tons with AIS device(Automatic Identification System) must be the objects given certain vessel traffic service. So Tong-yeong Coastal VTS which has the largest number of pleasure ship throughout the country tries to review some problems that have emerged since the beginning and require consideration in all its aspects to prevent any maritime incidents related with pleasure ships and contribute largely to making our sea safe.

• Journal of the Korean Society for Marine Environment & Energy
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• v.1 no.1
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• pp.93-101
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• 1998

Numerical models have been widely used to understand the structure of coastal currents and the transport mechanisms in regard to the fate of pollutants. This study focuses on the development of a three-dimensional model of coastal circulation and mass transport. The model was used to calculate coastal currents and temperature distributions of the thermal plume discharged from a power plant. The model results were compared with field-observed data. They showed the relatively good agreements with the data. The model can be used to estimate the currents and its mass transport in coastal waters.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.16 no.4
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• pp.299-304
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• 1983

A tongue-like warm water which is a part of the Tsushima Warm Current appears whole year around in the east entrance of the Jeju Strait. Because of this warm water, the current direction flowing into the Jeju Strait from its west area seems to be changed in the Jeju Strait. Therefore the intermediate and bottom water of the Jeju Strait may greatly influence the formation of the coastal water in the South Coast of Korea. Since this tongue-like warm water is stronger in winter than in summer in its formation, Tsushima Warm Current comes closer to the South Coast of Korea in winter and its north boundary frequently approaches close to the coast of Geomun Island and Sori Island.

• Proceedings of KOSOMES biannual meeting
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• 2004.05b
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• pp.13-18
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• 2004

The marine traffic congestion has increased due to the expansion of vessel traffic volume in Korean coastal waterway these days. Heavy traffic could bring serious marine casualties which cause the loss of human lives, properties and marine pollution in coastal area. In this paper. the probability analysis of marine casualties in Korean coastal To achieve this aim, clears up the cause of accident and examines closely the mutual relations among marine casualties, weather condition, and marine traffic volume. These casualties are classified into several pattens or the point of view of ship‘s size, ship’s type and ship‘s age and its characteristics of each patten are described in detail.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.17 no.4
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• pp.411-420
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• 1999

Coastal development and reclamation work make environment of shore destroy, such as rapid change of land use and destruction of wet-land and ocean ecosystem. Therefore new technique to detect change have been needed. This study designed new change detection method and applied to study area. The change detection image and quantitative change area by each classes are calculated. Also, this study can use the basic idea-determination data for coastal development and city plan as the sense of sight by changed images that changed from any land-cover to any land-cover between two dates.

• Proceedings of the Fisheries Business Administration Society of Korea Conference
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• 2005.11a
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• pp.29-50
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• 2005

EU는 세계 3위의 어업생산지역임에도 불구하고 가공어류와 양식수산물에 대한 세계 최대의 소비시장을 가진 탓에 만성적인 수산물 공급부족을 겪고 있다. 이에 따라 EU는 일찍부터 제3국과의 어업협정을 통한 원양어장 진출을 적극적으로 추진해 왔다. EU의 원양어장 진출정책을 시기별로 분류하면 1세대 유형에서부터 4세대 유형으로 구분가능하다. 수역별로는 크게 유럽북부와 남부수역으로 분리되어 있으나, 어업협정 유형으로는 북유럽형, 발틱형, 북미형, 중남미형, 그리고 ACP형으로 세분화 할 수 있다. EU는 특히 대부분의 쌍무어업협정을 아프리카, 인도양, 서태평양 연안국들과 맺고 있어, 이들 국가와의 쌍무적 어업관계가 EU 원양어업정책에 있어 매우 중요하다. 최근 원양어장의 자원부족현상이 점차 심각해짐에 따라 EU 위원회는 그들의 공동어업정책 개혁안에 제3국과의 어업협력강화 방안을 수립하였다. 이는 연안국과의 어업관계를 단순입어에서 동반자적 입어관계로 발전시키는 한편, 어업 외적인 부문의 협력을 포함하는 포괄적 접근 정책을 추진하고 있다. 이러한 EU의 움직임은 단순한 어획쿼터할당에 대한 입어료지급 방식은 조업국과 연안국 간의 신뢰관계 증진에 그다지 도움이 되지 못한다는 것을 의미한다. 따라서 조업국은 연안국에 대한 자원관리기술을 지원해 주고, 자원평가에도 공동으로 참여함으로써 양국간 협력적 수산자원관리정책을 지향하도록 하여야 한다는 것을 시사하고 있다.