• Journal of the korean society of oceanography
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• 제39권4호
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• pp.212-221
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• 2004

Concentrations of suspended particulate matters (SPM) and their distribution patterns were monitored three times in the East China Sea during the winter season in 1998 and 1999. SPM concentrations showed significant temporal variations controlled by the atmospheric conditions and sea states. In coastal area, SPM values were about 10-20 mg/l in fair weather conditions, but exceeded 100mg/l during the storm periods. Turbid waters were distributed widespread in the continental shelf of the East China Sea and the coastal area of the Korean Peninsula, and these two areas were connected along a NE-SW direction. The distribution patterns of turbid waters were interpreted as representing the transport behavior of suspended matter. Although the primary source of inner shelf mud deposits of Korea seems to be the Korean Peninsula, contribution from the East China Sea to the coastal area of Korea increases especially during the winter season.

• 한국지구과학회지
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• 제25권1호
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• pp.1-9
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• 2004

The clay minerals of thirty-four bottom sediments collected from the northwestern continental shelf of the East China Sea have been determined by X-ray diffraction analysis. The clay mineral distribution is mainly controlled by the sediment source and the dominant circulation pattern. The predominant clay mineral in our study area is illite comprising more-than 70% of whole clay fraction. The highest concentration of illite (>72%) is found in the southeastern offshore parts beyond the reach of terrigenous input from the Cheju Island. It means that these illites are largely transported by the Kuroshio Current from the South China Sea. Smectite is highly concentrated in the northwest middle part and in the outer-shelf mud patch. It seems to be due to the high supply of smectite transported from China where the fine-grained sediments are discharged from the modern and ancient Huanghe River. The relatively high abundance of kaolinite is likely derived from the Changjiang River via Taiwan ·Warm Current. In contrast, the large amounts of chlorite and high chlorite/kaolinite ratios occur in the northwestern are, reflecting the transportation by the Huanghai Sea Coastal Current from the southern Yellow Sea.

• Fisheries and Aquatic Sciences
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• 제3권1호
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• pp.14-22
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• 2000

The relationship between the distribution of demersal fishes and that of the water masses was examined by using the catches data and hydrographic data in the Yellow Sea and the East China Sea on May 13-19, 1996 and May 10-17, 1997. During the study period, the dominant fish species were Cleisthenes pinetorum herzinsteini, Lophiomus setigerus and Pseudosciaena polyactis. These three low temperature water species accounted for $21-24\%$ of the total catches. The percentage of the low temperature water species was high in the Yellow Sea and the coastal area on the continental shelf of the East China Sea but was low in the vincinity of Kyushu during the study period. In the East China Sea, the isotherm of $15^{\circ}C$ at 50m, mid layer depth, was located more southeast in 1996 than in 1997. The bottom water temperature was about it lower in 1996 than in 1997. The direction of the detided current on the continental shelf of the East China Sea was southward in 1996 and northward in 1997. Yellow Sea Bottom Cold Water (YSBCW) strongly expanded to south in 1996 when the northward current was weak. But, Tsushima Warm Current (TSWC) strongly intruded into the continental shelf of the East China Sea in 1997. As YSBCW expanded strongly to south in 1996, the percentage of the low temperature water species relative to the total catches was high. But, TSWC strongly intruded and the percentage of low temperature water fishes was low in 1997.

• Ocean and Polar Research
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• 제28권2호
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• pp.175-186
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• 2006

There are disputes for oil and gas development between China and Japan in the East China Sea. These involve the area where China is already carrying out activities of oil and gas development and where Japan is proclaiming its EEZ. China insists that the Chinese activities on oil and gas development area are being carried out within the Chinese jurisdictional waters even if the median line principle of Japanese proclamation is applied in delimitation. Indeed, the permit for Japanese development is causing disputes between China and Japan because its permit allows development in the waters adjacent to Chinese development area. h the event, the core of this dispute around the oil and gas field in the East China Sea relates to issues of maritime boundary delimitation and issues of resources acquisition with both states. Chinese policy on oil and gas development is to first consider development issues in accordance with a median line principle where waters toward to China from the median line should be developed by China and the area toward Japan from the median line within the Chinese continental shelf should be jointly developed. However, the Japanese position is that the East China Sea should be jointly developed, and Japan hopes to eventually convince China to accept its median line delimitation. With on-going development of such issues, Korea should establish a strategy of negotiation based on analyses of resource distributional conditions and other strategic factors in the Korean delimitation area. In particular, Korea should prepare and make the best use of joint development zone established in an agreement between the ROK and Japan concerning the development of the southern part of continental shelf adjacent to both states.

• 한국해안해양공학회지
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• 제5권4호
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• pp.414-426
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• 1993

황해 및 동중국해륙붕에서 해류관측에 이용되는 현대적인 방법들을 기술하였고 이 해역 해류의 변화도를 해류관측방법과 관연하여 토의하였다. 이 육붕해역의 보고된 해류관측의 총체적인 자료수집을 수행하였다.

• 한국해안해양공학회지
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• 제4권1호
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• pp.45-58
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• 1992

황해 및 동중국해에서 기상학적으로 유발된 연여균 및 계절적 해류 순환을 산정하기 위해 3次元 수치모형이 이용되었는데 수치모형은 불규칙한 연안경계와 실제 수심을 반영할 수 있도록 구성되었다. 본 연구에서는 전회의 동중국해의 3차원 수치모형 (Choi, 1984)을 제붕역에서의 흐름을 좀더 자세히 재현할 수 있도록 세분화하였는데 모형에 사용된 유한격자체계의 해상도는 위도 4분과 경도 5분으로 구성되었으며 황해 및 동중국해상에서 유속의 3차원적 순환 형태가 산정되어 제시되었다. 수치모형에 의해 계산된 기상학적으로 유발된 恒流 유원은 이 해역의 여러 영역에서 수심(표면, 중간수심, 바닥)別 및 전체 水柱에 대해 해수 문체시간을 계산하는데 이용되었다.

• 한국해양학회지
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• 제19권1호
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• pp.36-43
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• 1984

複雜한 沿岸地形 및 水深變化를 考慮한 黃海 및 東支那海의 三次元 水動力學的 羞恥모델을 開發하여 定常均一風의 應力에 의한 海流의 手織分布를 算定하였다. 北西風 및 南西風의 秒速 약 10m에 該當하는 海面應力 1.6dyne/$\textrm{cm}^2$에 의한 陸棚體系의 反應을 調査하기 위한 手織實驗에서 動的 循環形態를 提示하고 檢討하였다.

• 한국해안해양공학회지
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• 제2권4호
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• pp.231-244
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• 1990

본 연구의 장기적인 목적은 황해와 동지나해 육붕에서의 중규모적 순환 역학을 조사하는 데 있다. 슈퍼콤의 등장과 흐름의 해상력을 제고시키기 위해 전 육붕해역을 위도상 1/15도, 경도상 1/12도 격자간격을 갖는 수치해석모형을 수립하였다. 첫 단계로서 육붕해의 우세한 조석현상인 주태음양일주조의 조석체계를 산정하였다. 초기결과가 제시되었으며 추후의 모형개선을 위한 토의를 하였다.

• 물과 미래
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• 제21권2호
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• pp.183-192
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• 1988

육붕상의 유동현상을 상세하게 해상시키기 위해 기 보고된 동지나해의 2차원 비선형조석모형(최, 1980)을 위도상 4분, 경도상 5분의 격자간격을 갖는 유한차분격자체계로 개선시켰다. 수립된 세격자모형은 동지나해의 $M_2$ 조석 및 $M_4$조석을 재현시키는데 일차적으로 이용되었는데 산정된 조석체계의 신뢰성은 모형산정치와 황해동측의 조석관측 결과와의 전반적인 일치로서 입증되었다. 육붕전체에 걸친 해저최대마찰응력 및 조석항류의 분포가 제시되었으며 또한 토의되었다.

• 한국해양학회지
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• 제6권2호
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• pp.85-91
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• 1971

The origin of the Tsushima Current water was investigated with a discussion on the western North Pacific Central Water. The Tsushima Current water is formed by the mixing of the Kuroshio surface water and the East China Sea water. The area where the mixing takes place remarkably is found to be the marginal region of the continental shelf of the East China Sea at the depth from 100 to 200 meters.