• 제목/요약/키워드: 해류

검색결과 417건 처리시간 0.026초

Wave and surface current measurement with HF radar in the central east coast of Korea (동해중부에서 HF Radar를 이용한 파랑 및 해수유동 관측)

  • Kim, Moo-Hong;Kim, Gyung-Soo;Kim, Hyeon-Seong
    • Journal of Advanced Marine Engineering and Technology
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    • 제38권6호
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    • pp.771-780
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    • 2014

  • We installed HF Radar of Array type in Site A and Site B, observing the real-time wave and current in the central East coast of Korea. WERA(WavE RAdar) in this research uses HF Radar of Array Type with frequency range of 24.525 MHz, developed by Helzel, Germany. Each site is a 8-Channel system consisting of four transmitters and eight receivers, generating wave and current data, being observed every thirty minutes at the present time. HF Radar has grid resolution of an interval of 1.5 km using bandwidth of 150 kHz; The wave data covers an observation range of about 25 km, and the current data covers the maximum observation range of about 50 km. The Wave data observed by HF Radar was compared and verified with the AWAC data observed in the research sites. MIT also compared the Current data observed by HF Radar with Monthly the East sea average surface current and current flow pattern provided by KOHA(Korea Hydrographic and oceanographic Administration). The regression line and deviation of the comparison data of Wave was calculated by Principal Component Analysis, which showed correlation coefficient 0.86 and RMSD 0.186. Besides, data analysis of long-term changes of the current in the East coast showed that, during August and September, the North Korean Cold Current flow into the southward direction and the East Korean Warm Current flow into the northward direction in the coast.

  • https://doi.org/10.5916/jkosme.2014.38.6.771 인용 PDF KSCI

Numerical Model for Spreading of Cochlodinium Bloom in the Southern Coastal Waters in Korea (한국 남해안에서 Cochlodinium적조 확산모델)

  • Kwon Chul Hui;Cho Ku Dae
    • Korean Journal of Fisheries and Aquatic Sciences
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    • 제35권6호
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    • pp.568-577
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    • 2002

  • The spreading Cocuoainim polykikoides bloom in the southern coastal waters of Korea was simulated using numerical model including the physical processes of water flow and the chemical processes of increasing cell of C. polykikoides by uptake of dissolved nutrients. The circulation of sea water was simulated by two dimensional tide model reflecting the main four tidal components of $M_2,\;S_2,\;K_1,\;O_1$, and permanent current was driven by inflow/outflow across open boundaries. According to the result of model which tidal and permanent current were reflected simultaneously, eastward flows entering the southern waters from the western waters of Korea are dominant but westward flows are weak relatively. These result suggest that it is difficult for initial C. polykikoides bloom generated in the coastal waters of Goheung to move to the western coast of Korea through Jeju Strait. For spreading model of C. poiyhikoides, the range of generating distribution and the generating time of C. polykikoides bloom in coastal area are similar to those of observation data in the field. Wind is the most important factor in moving and distribution of red tide. Permanent current flowing eastward is also considered to be important factor and tidal current was a little influenced.

  • https://doi.org/10.5657/kfas.2002.35.6.568 인용 PDF KSCI