• 한국수산과학회지
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• 제46권6호
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• pp.973-976
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• 2013

We observed the vertical distribution and feeding ecology of the Mirror dory, Zenopsis nebulosa, in the Southern Sea of Korea from 2009 to 2013 using an otter trawl. The total length of captured individuals ranged from 11 to 48 cm. Individuals captured at greater depths were significantly larger than those from shallower sites. Fish abundance was significantly related to depth and temperature. We found that 89% of the total catch was obtained at depths between 80 and 140 meters. Prey organisms, including fish, crustaceans, and cephalopods, were found in Z. nebulosa stomachs. Fishes were the main prey items for all size groups. Cephalopods were consumed by individuals > 25 cm in length. Our findings suggested that the vertical distribution of Z. nebulosa varied with depth and temperature, and that the fish are carnivores.

• 한국해양학회지
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• 제27권2호
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• pp.123-136
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• 1992

한국의 서해와 남해에서 채집된 50개의 시료에서 채출된 183종의 저서 유공충의 분포자료를 동물군 분석한 결과, 5개의 생물군집(bioassociation)과 5개의 생물장 (biotope)이 구분되었다. 생물군집, 생물장의 지리적 분포 및 유공충 종의 이용가능한 생태학적 자료로부터 5개의 생물상(biofacies)이 인지되었다. (1) 남부 내대륙붕 생물 상; (2) 남부 해안 생물상; (3) 북부 중대륙대 생물상; (4) 중앙 중대륙대 생물상; (5) 남부 외대륙붕 및 상대륙사면 생물상. 특징적인 종 군집을 포함하는 시료들의 집 단으로 정의 되는 생물상은 연구해역에서 주요 해류 분포양상과 밀접한 관계가 있다. 남부 내대륙붕 생물상은 연안류와 중국으로부터 유입되는 하천수의 영향을, 남부 해안 생물상은 연안류와 한반도로부터 유입되는 하천수의 영향을 크게 받고 있는 것으로 보 인다. 또한 북부 중대륙붕 생물상은 연안류와 황해 냉수층, 중앙 중대륙붕 생물상은 황해 난류, 그리고 남부 외대륙붕 및 상대륙사면 생물상은 쓰시마 난류와 밀접한 관계 가 있는 것으로 보인다.

• Ocean and Polar Research
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• 제29권1호
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• pp.1-8
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• 2007

A series of long chain unsaturated ketone (alkenone) was identified in the particulate organic matter sampled from surface water of the eastern South Sea, Korea. The seawater temperature based on the $C_{37}$ alkenone was calculated by using several different equations of unsaturation index(${U^{K'}}_{37}$), compared with in situ CTD temperature. Among the previously reported equations, the equation(0.044T-0.204) which was proposed by Sawada et al.(1996) seems to be the most useful for the calculation of $C_{37}$ alkenone temperature, showing average $0.51^{\circ}C$ difference between ${U^{K'}}_{37}$ temperature and in situ CTD temperature. This result suggest that alkenone should be a useful molecular biomarker for reconstructing paleo-environmental change in the South and East Sea, Korea. However, it is required to establish more reliable equation for the calculation of $C_{37}$ alkenone temperature.

• 한국환경과학회:학술대회논문집
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• 한국환경과학회 2003년도 International Symposium on Clean Environment
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• pp.177-184
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• 2003

Numerical simulation on marine wind and sea surface elevation was carried out using both three-dimensional hydrostatic and non-hydrostatic models and a simple oceanic model from 0900 LST, August 13 to 0900 LST, August 15, 1995. As daytime easterly meso-scale sea-breeze from the eastern sea penetrates Kangnung city in the center part as basin and goes up along the slope of Mt. Taegullyang in the west, it confronts synoptic-scale westerly wind blowing over the top of the mountain at the mid of the eastern slope and then the resultant wind produces an upper level westerly return flow toward the East Sea. In a narrow band of weak surface wind within 10km of the coastal sea, wind stress is generally small, less than l${\times}$10E-2 Pa and it reaches 2 ${\times}$ 10E-2 Pa to the 35 km. Positive wind stress curl of 15 $\times$ 10E-5Pa $m^{-1}$ still exists in the same band and corresponds to the ascent of 70 em from the sea level. This is due to the generation of northerly wind driven current with a speed of 11 m $S^{-1}$ along the coast under the influence of south-easterly wind and makes an intrusion of warm waters from the southern sea into the northern coast, such as the East Korea Warm Current. On the other hand, even if nighttime downslope windstorm of 14m/s associated with both mountain wind and land-breeze produces the development of internal gravity waves with a hydraulic jump motion of air near the coastal inland surface, the surface wind in the coastal sea is relatively moderate south-westerly wind, resulting in moderate wind stress. Negative wind stress curl in the coast causes the subsidence of the sea surface of 15 em along the coast and south-westerly coastal surface wind drives alongshore south-easterly wind driven current, opposite to the daytime one. Then, it causes the intrusion of cold waters like the North Korea Cold Current in the northern coastal sea into the narrow band of the southern coastal sea. However, the band of positive wind stress curl at the distance of 30km away from the coast toward further offshore area can also cause the uprising of sea waters and the intrusion of warm waters from the southern sea toward the northern sea (northerly wind driven current), resulting in a counter-clockwise wind driven current. These clockwise and counter-clockwise currents much induce the formation of low clouds containing fog and drizzle in the coastal region.

• Journal of the korean society of oceanography
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• 제32권3호
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• pp.128-137
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• 1997

This study presents results from a detailed sedimentological investigation of surface sediments obtained from the Korea Strait region, the southern part of the East Sea (Sea of Japan). The distribution of different types of bottom sediments is controlled by the recent fine-grained sediment transport and deposition combined with the lowerings of sea level during the last glacial period, forming a diverse mixture of organic-rich fine-grained and shelly coarse-grained sediments. In comparison to high organic concentration of fine-grained sediments in the inner continental shelf and slope areas, the shell-rich coarse-grained sediments on the outer shelf are discernible being further modified. These coarse-grained sediments are confirmed as relict resulting from the sediment dynamics during the lower sea levels of the last glacial period. Clay mineral distribution of the fine-grained sediments gives information about the transport mechanism. Presence of present-day current system (the Tsushima Warm Current) is most probable source for the fine-grained particles into the open East Sea from the East China Sea, indicating that Holocene sediment dynamics may be used to explain the observed distribution of surface coarse-grained shell-rich sediments.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2004년도 춘계학술대회 논문집
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• pp.83-84
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• 2004

• 수산해양기술연구
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• 제27권1호
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• pp.41-55
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• 1991

최근 10년간(1977년~1986년) 제주시와 서귀포시의 지상기상자료를 분석하여 제주도지방의 해륙풍의 기후학적 특성을 조사한 결과를 요약하면 다음과 같다. 1. 해륙풍의 발생빈도는 월별로는 8월(약 15.5%)이 가장 높고 그 다음이 9월, 10월, 5월, 11월의 순이다. 춘계보다는 추계가 더 발생빈도가 높으며 동계 매월 평균(약 5%)가 가장 낮다. 2. 해풍은 제주도의 북부해안이 남부해안보다 연평균 약 30분 정도 더 일찍 발생하고 약 1시간정도 늦게 소멸한다. 반대로 육풍은 남부해안이 북부보다 연평균 1시간 정도 일찍 발생하나 연평균 소멸시각은 남북해안이 비슷하다. 제주도지방의 해풍의 발생시각은 연평균 9~10시로 남해안 지방(13~14시)보다 약 4시간 이르며, 소멸시각은 연평균 17~19시로 역시 남해안지방(19~21시)보다 약 2시간 정도 이르다. 3. 해풍의 연평균 지속시간은 북부해안이 남부해안보다 약 1시간 정도 길고, 육풍의 그것은 반대로 약 1시간 정도 짧게 나타난다. 계절별로는 해풍의 경우 하계가 동계보다 길고 육풍의 경우는 또 그 반대이다. 해풍에서 육풍으로의 전이시간은 하계가 길고 동계가 짧은 경향을 보이며, 육풍에서 해풍으로의 전이시간은 계절적인 특징이 나타나지 않는다. 4. 해풍의 최대풍속의 출현시각은 연 평균적으로 북부해안(14.0시)보다 남부(13.4)가 다소 일찍 나타나나, 육풍은 비슷한 양상(약 2.5시)을 보여주며, 해풍이나 육풍 모두 월평균 출현시각의 계절적 특징은 뚜렷하지 않다. 그리고 해풍과 육풍의 월평균 최대풍속은 각각 남북해안 모두 비슷하고 연평균으로는 해풍(약 4.1m/s)이 육풍(약 3.3m/s)보다 다소 강하다.

• Ocean and Polar Research
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• 제26권1호
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• pp.65-75
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• 2004

In order to understand the water masses and their distribution in the eastern Yellow Sea from winter to spring, a cluster analysis was applied to the temperature and salinity data of Korea Oceanographic Data Center from 1970 to 1990. From December to April, Yellow Sea Cold Water (YSCW) dominates the eastern Yellow Sea, whereas Eastern Yellow Sea Mixed Water (MW) and Yellow Sea Warm Water (YSWW) are found in the southern part of the eastern Yellow Sea. MW appears at the frontal region around $34^{\circ}N$ between YSCW in the north and YSWW in the south. On the other hand, Tshushima Warm Water (TWW) is found around Jeju Island and the South Sea of Korea. These water masses are relatively well-mixed throughout the water column due to the winter monsoon. However, the water column begins to be stratified in spring due to increased solar heating, the diminishing winds and fresh water discharge, and the water masses in June may be separated into surface, intermediate and bottom layers of the water column. YSWW advances northwestward from December to February and retreats southeastward from February to April. This suggests a periodic movement of water masses in the southern part of the eastern Yellow Sea from winter to spring. YSWW may continue to move eastward with the prevailing eastward current to the South Sea from April to June. Also, the front relaxes in June, but the mixed water advances to the north, increasing salinity. The salinity is also higher in the nearshore region than offshore. This indicates an influx of oceanic water to the north in the nearshore region of the eastern Yellow Sea in spring in the form of mixed water.

• 한국수산과학회지
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• 제43권3호
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• pp.254-261
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• 2010

The feeding habits of six shark species, Scyliorhinus torazame, Mustelus manazo, Squalus megalops, Isurus oxyrinchus, Alopias pelagicus, and Carcharhinus plumbeus were studied using the stomach contents of 463 specimens collected between January and February 2007 in the southern sea of Korea. They consumed different prey items. S. torazame preyed mainly crustaceans, and M. manazo on crustaceans and fishes. S. megalops, I. oxyrinchus, A. pelagicus, and C. plumbeus consumed predominately fishes. Non-metric multi-dimensional scaling (NMDS) ordination plots emphasized that dietary similarities separated thesix shark species into three trophic groups based on similarities in percentage Index of Relative Importance (%IRI): Group I (crustacean feeders), Group II (fish and crustacean feeders), and Group III (fish feeders).

• 대기
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• 제28권1호
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• pp.25-35
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• 2018

This study presents future potential sea level change over the seas surrounding Korea using Climate Model Intercomparison Project Phase 5 9 model ensemble result from Representative Concentration Pathways (RCPs), downloaded from icdc.zmaw.de. At the end of 21st century, regional sea level changes are projected to rise 37.8, 48.1, 47.7, 65.0 cm under RCP2.6, RCP4.5, RCP6.0 and RCP8.5 scenario, respectively with the large uncertainty from about 40 to 60 cm. The results exhibit similar tendency with the global mean sea level rise (SLR) with small differences less than about 3 cm. For the East Sea, the Yellow Sea, and the southern sea of Korea, projected SLR in the Yellow Sea is smaller and SLR in the southern sea is larger than the other coastal seas. Differences among the seas are small within the range of 4 cm. Meanwhile, Commonwealth Scientific and Industrial Research Organization (CSIRO) data in 23 years shows that the mean rate of sea level changes around the Yellow Sea is high relative to the other coastal seas. For sea level change, contribution of ice and ocean related components are important, at local scale, Glacial Isostatic Adujstment also needs to be considered.