Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Observation of the Sea Surface Skin Current Using a GPS-Drifter

GPS 뜰개를 이용한 해양 표면류 관측

  • Park, Joon Seong (Marine Environments & Conservation Research Division, KIOST) ;
  • Kang, KiRyong (Global Environment System Research Lab, National Institute of Meteorological Research) ;
  • Lee, Seok (Marine Environments & Conservation Research Division, KIOST) ;
  • Lee, Sang-Ryong (Department of Oceanography, College of Natural Sciences, Pusan National University)
  • 박준성 (한국해양과학기술원 해양환경.보전연구부) ;
  • 강기룡 (국립기상연구소 지구환경시스템연구과) ;
  • 이석 (한국해양과학기술원 해양환경.보전연구부) ;
  • 이상룡 (부산대학교 자연과학대학 해양학과)
  • Received : 2013.05.13
  • Accepted : 2013.07.22
  • Published : 2013.09.30
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Abstract

A GPS-drifter was newly designed to observe the sea surface skin current and to estimate the direct wind effect on the sea surface. After conducting a test to establish and verify the accuracy of the GPS itself in the laboratory, in-situ experimental campaigns at Saemangeum in Gunsan city and Haeundae in Busan city, Korea, were carried out to ascertain the drifter track and to estimate the velocity data set on Oct. 3, 15, 23, 27 and Nov. 25, 2011. The current meters, RCM9 and ADCP, were moored together to remove the background current field, and the wind data were obtained from several marine stations such as towers and buoys in these areas. The drifter-observed velocity show good agreement with the flow obtained by the HF radar in the Saemangeum area. The direction of the wind-driven current extracted from the drifter-observed velocity was completely deflected to the right, however the degree of the angle was different according to the drift types. The average speed of the wind-driven current matched with 2.19~2.81% of the wind speed and the deflection angle was about $8.0{\sim}10.9^{\circ}$ without adjustment for the land-sea effect, and about 2.19~2.84% and $4.1{\sim}6.0^{\circ}$ with the adjustment for the land-sea effect.

Keywords

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