• 제목/요약/키워드: Korean coastal seas

검색결과 214건 처리시간 0.03초

南東 아시아 海域의 潮汐 數値 模型 (A Numerical Tidal Model for the Southeast Asian Seas)

  • Byung Ho Choi;Duk Gu Kim;Dong Hoon Kim
    • 한국해안해양공학회지
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    • 제9권2호
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    • pp.63-73
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    • 1997
  • 본 연구에서는 기조역항이 포함된 1/12$^{\circ}$x1/12$^{\circ}$의 해상도를 갖는 2차원 조석모형을 사용하여, 동남아시아 전역에 대한 4개의 반일주조(M$_2$, S$_2$, $K_2$, $N_2$)와 4개의 일주조(K$_1$, $O_2$, P$_1$, Q$_1$)의 분포를 산정하였다. 산정 결과들은 관측 자료들과의 비교되었으며 기존의 Schwiderski의 조석도및 기존의 일부 해역만을 포함하는 조석도와 비교 검토되었다

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위성 자료를 이용한 제주도 주변해역의 중국대륙연안수 영향에 관한 연구 (A study on the influence of the China Coastal Waters nearby Jeju Island Using Satellite Data)

  • 조한근;윤흥주
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 춘계학술대회 논문집
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    • pp.91-94
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    • 2006
  • 중국 대륙연안수(CCW;China Coastal Waters)는 해에 따라 다소 다르지만 보통 하계인 6월$\sim$10월 사이에 제주도 주변해역에서 두드러지게 나타난다. 즉, 5월에 나타나기 시작하여 8월에 가장 큰 영향을 미치며 10월로 접어들면서 그 세력이 점차 소멸해간다. 해수면편차와 해수면온도의 경험직교함수 분석 결과 해수면편차는 $1{\sim}3$모드가 총 분산의 95.05%를 차지하였고, 해수면온도는 1모드가 총 분산의 98.70%를 차지하였다. 해수면편차 경험직교함수분석의 첫 번째 결과에 대한 파워스펙트럼분석에서는 중국대륙연안수에 의한 영향으로 동쪽해역보다 서쪽해역이 43일 주기의 세력이 더 강하게 나타났다. 해수면온도에 대해서는 양자강 하구를 비롯한 제주도 동쪽 서쪽해역의 주기가 모두 260일 주기가 나타남으로서 중국대륙연안수는 43일, 120일 등의 짧은 주기 보다는 비교적 장주기라 할 수 있는 260일 주기에 더 큰 영향을 미쳤다.

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CMIP5 자료를 활용한 우리나라 미래 해수면 상승 (Future Sea Level Projections over the Seas Around Korea from CMIP5 Simulations)

  • 허태경;김영미;부경온;변영화;조천호
    • 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.

동아시아 해역의 조석 모형 (Modelling of Tides in the East Asian Marginal Seas)

  • 최병호;고진석
    • 한국해안해양공학회지
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    • 제6권1호
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    • pp.94-108
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    • 1994
  • 연근해에서의 위성고도계 자료의 정확도가 향상됨에 따라 기존에 잘 알려져 있는 Schwiderski의 전구적 모형보다 더 정확한 조석모형으로 위성고도계 자료에서의 조석성분에 대한 보정을 향상시킬 필요가 있다. 초기단계로 오오츠크해, 남중국해와 북서태평양역을 포함하는 동아시아 전 해역에 대해 기존의 조석모형보다 해상도가 높은 1/6도 격자체계의 조석모형을 수립하여 반일주조(M$_2$, S$_2$, $N_2$, $K_2$)와 일주조(K$_1$, $O_1$, P$_1$, Q$_1$)의 조석체계에 대한 수치모형실험을 수행하였다. 계산된 결과들과 이 해역에서의 관측치와 기존의 경험적 조사도 및 Schwiderski의 조석도와 비교분석이 이루어졌다.

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SATELLITE MONITORING OF OIL POLLUTION IN THE EUROPEAN SEAS

  • Kostianoy, Andrey G.
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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    • pp.977-980
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    • 2006
  • Ships and industries damage the delicate coastal ecosystem in many parts of the world by releasing oil or pollutants into rivers, coastal and offshore waters. After a tanker accident the biggest problem is to get a clear idea of the extent of the oil slick and predict the way it will move. For natural and man-made oil spills it is necessary to operate a regular and operational monitoring. In the Mediterranean, North and Baltic seas aircrafts or ships normally carry it out. This is expensive and is constrained by the limited availability of these resources, borders between countries, daylight hours, good weather conditions, etc. Satellite imagery can help greatly identifying probable spills over large areas and then guiding aerial surveys for precise observation of specific locations. The Synthetic Aperture Radar (SAR) instrument, which can collect data almost independently of weather and light conditions, is an excellent tool to monitor and detect oil on water surfaces. SAR is currently on board the ENVISAT, ERS-2 and RADARSAT satellites. The application of this technology to the investigation of oil pollution in the Caspian, Black, Mediterranean, North and Baltic seas is shown.

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연.근해 운항선박의 해난실태와 사고방지대책 (A Study on Some Consideration of Marime Casualities and Prevention Measures against them of Vessels engaged in Near-coastal and Greater-coasting Seas)

  • 윤점동;이윤철
    • 한국항해학회지
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    • 제15권1호
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    • pp.67-93
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    • 1991
  • In general, marine casualities take palace by the composite action of three elements such as waterway condition, vessel condition and man condition. One of the important characteristics of most marie casualties for small cargo vessels in maritime transportation of near-coastal and greater-coasting seas in that the same kind of casualities take place repeatedly in spite of the apprent causes, Because, it takes much time and effort for seamen to master waterway, vessel or operatin technique only to the practical and sensible level. In these days, with the development of our economy, our shiypping industry has grown and therefore the demand of marine officers has increased. This economic growth brought about undesirable situation like the evasion of seamen and frequent casualities of Korea vessels. These marine casualities are being caused mainly by the unskilfulness of operating technique as well as the bad waterway condition and ship's installation condition. Therefore, I conclude, in this paper, that the most efficient and economic preventing measures of marine casualities are seeking causes and removing them in advance under the close coperation system among all concerned parties.

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Satellite data analysis of the China Coastal Waters in the Seas surrounding Jeju Island, Korea

  • Yoon, Hong-Joo
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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    • pp.344-347
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    • 2006
  • China Coastal Water (CCW) usually appears in the seas surrounding Jeju Island annually (June?October) and is very pronounced in August. The power spectrum density (PSD), sea level anomalies (SLAs), and sea surface temperatures (SSTs) were found to peak annually and semiannually. The peaks at intervals of 80-, 60-, and 43-days are considered to be influenced by CCW and the Kuroshio Current. Generally, low-salinity water appears to the west of Jeju Island from June through October and gradually propagates to the east, where CCW meets the Tsushima Current. Empirical orthogonal function (EOF) analysis of SLAs and SSTs indicated that the variance in SLAs and SSTs was 55.70 and 98.09% in the first mode, respectively. The PSD for the first mode of EOF analysis of SLAs was stronger in the western than in the eastern waters because of the influence of CCW. The PSD for the EOF analysis of SSTs was similar in all areas (the Yangtze Estuary and the waters to the west and east of Jeju Island), with a period of approximately 260 days.

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