Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Variability of the Coastal Current off Uljin in Summer 2006

2006년 하계 울진 연안 해류의 변동성

  • Lee, Jae Chul (Department of Oceanography, College of Environmental and Marine Sciences and Technology Pukyong National University) ;
  • Chang, Kyung-Il (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University)
  • 이재철 (부경대학교 환경.해양대학 해양학과) ;
  • 장경일 (서울대학교 자연과학대학 지구환경과학부)
  • Received : 2013.12.24
  • Accepted : 2014.05.20
  • Published : 2014.06.30
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Abstract

In an effort to investigate the structure and variability of the coastal current in the East Sea, a moored ADCP observation was conducted off Uljin from late May to mid-October 2006. Owing to the transition of season from summer to autumn, the features of the current and wind can be divided into two parts. Until mid-August (Part-I), a southward flow is dominant at all depths with a mean alongshore velocity of 4.2~8.9 cm/s but northward winds are not strong enough to reverse the near-surface current. During Part-II, a strong northward current occurs frequently in the upper layer but winds are predominantly southward including two typhoons that have deep-reaching influence. Profile of mean velocity has three layers with a northward velocity embedded at 12~28 m depth. The near-surface current of Part-II significantly coheres with winds at 4-8 day periods with a phase lag of about 12 hours. The modal structure of the current obtained by EOF analysis is: (1) Mode-1, having 83.6% of total variance, represents the current in the same direction at all depths corresponding to the southward North Korean Cold Current (NKCC). (2) Mode-2 (11.7%) reveals a two-layer structure that can be explained by the northward East Korean Warm Current (EKWC) in the upper layer and NKCC in the lower. (3) Mode-3 (2.6%) has three layers, in which the EKWC is reversed near the surface by opposing winds. This mode is particularly similar to the mean velocity profile of Part-II.

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References

  1. 김영호, 민홍식 (2008) 동해 재분석 자료에 나타난 북한한류의 계절 및 경년변동성. Ocean and Polar Res 30(1):21-31 (Kim YH, Min HS (2008) Seasonal and interannual variability of the North Korean cold current in the East Sea reanalysis data. Ocean and Polar Res 30(1):21-31 (in Korean) ) https://doi.org/10.4217/OPR.2008.30.1.021
  2. 김일남, 이동섭 (2004) 하계 대한해협 저층냉수의 물리.화학적인 특성 및 기원. Ocean and Polar Res 26(4):595-606 (Kim IN, Lee T (2004) Physicochemical properties and the origin of summer bottom cold waters in the Korea Strait. Ocean and Polar Res 26(4):595-606 (in Korean)) https://doi.org/10.4217/OPR.2004.26.4.595
  3. 김철호, 김구 (1983) 한국 동해안에 출현하는 냉수괴의 특성과 기원. J Oceanol Soc Korea 18(1):73-83 (Kim CH, Kim K (1983) Characteristics and origin of the cold water mass along the East Coast of Korea. J Oceanol Soc Korea 18(1):73-83 (in Korean))
  4. 나정열, 이성욱, 조규대 (1991) 한반도 근해의 해류 및 해수 특성-한국 동해의 수온의 수직구조. Bull Korean Fish Soc 24(4):215-228 (Na JY, Lee SW, Cho KD (1991) A study on sea water and ocean current in the sea adjacent to Korea Peninsula-The vertical structure of temperatures in the East Sea of Korea. Bull Korean Fish Soc 24(4):215-228 (in Korean))
  5. 박경애, 박지은, 최병주, 변도성, 이은일 (2013) 해양관측을 통해 획득한 과학적 지식에 기반한 과학교과서 동해 해류도. 한국해양학회지 바다 18(4):234-265 (Park K-A, Park J-E, Choi B-J, Byun D-S, Lee E-I (2013) An oceanic current map of the East Sea for science textbooks based on scientific knowledge acquired from oceanic measurements. J Oceanol Soc Korea 18(4):234-265 (in Korean))
  6. 박청길 (1978) 한국 동해안 냉수괴의 해양화학적 고찰. Bull Korean Fish Soc 11(2):49-54 (Park CK (1978) Chemical oceanographic aspect of the cole water mass in offshore of the east coast of Korea. Bull Korean Fish Soc 11(2):49-54 (in Korean))
  7. An HS, Chung JY (1982) The fluctuation of the thermal front in the southeastern area off Korea. J Oceanol Soc Korea 17(2):33-40 (in Korean)
  8. Hong C-H, Cho K-D (1983) The northern boundary of the Tsushima Current and its fluctuations. J Oceanol Soc Korea 18(1):1-9 (in Korean)
  9. Kawabe M (1982) Branching of the Tsushima current in the Japan Sea, Part I. Data analysis. J Oceanogr Soc Japan 38:95-107 https://doi.org/10.1007/BF02110295
  10. Kim K, Legeckis R (1986) Branching of the Tsushima current in 1981-83. Prog Oceanogr 17:265-276 https://doi.org/10.1016/0079-6611(86)90049-2
  11. Lee D-K, Niiler PP (2005) The energetic surface circulation patterns of the Japan/East Sea. Deep-Sea Res Pt II 52:1547-1563 https://doi.org/10.1016/j.dsr2.2003.08.008
  12. Lee D-K, Niiler PP (2010) Surface circulation in the southwestern Japan/East Sea as observed from drifters and sea surface height. Deep-Sea Res Pt II 57:1222-1232 https://doi.org/10.1016/j.dsr.2010.06.003
  13. Lee JC (1983) Variations of sea level and sea surface temperature associated with wind-induced upwelling in the southeast coast of Korea in summer. J Oceanol Soc Korea 18(2):6-19 (in Korean)
  14. Lee JC, Na JY (1985) Structure of upwelling off the southeast coast of Korea in summer. J Oceanol Soc Korea 20(3):149-160 (in Korean)
  15. Lee JC, Kim DH, Kim JC (2003) Observations of coastal upwelling at Ulsan in summer 1997. J Korean Soc Oceanogr 38(3):122-134 (in Korean)
  16. Lee T, Kim IN (2003) Chemical imprints of the upwelled waters off the coast of the southern East Sea of Korea. J Korean Soc Oceanogr 38(3):101-110 (in Korean)
  17. Lie H-J, Byun S-K (1985) Summertime southward current along the east coast of Korea. J Oceanogr Soc Korea 20(2):22-27 (in Korean)
  18. Lie H-J, Suk M-S, Kim C-H (1989) Observation of southeastward deep current off the east coast of Korea. J Oceanogr Soc Korea 24:63-68 (in Korean)
  19. Martin S, Kawase M (1998) The southern flux of sea ice in the Tatarsky Strait, Japan Sea and the generation of the Liman Current. J Mar Res 56:141-155 https://doi.org/10.1357/002224098321836145
  20. Park K-A, Kim K, Cornillon PC, Chung JY (2006) Relationship between satellite-observed cold water along the Primorye coast and sea ice in the East Sea (the Sea of Japan). Geophys Res Lett 33:L10602. doi:10.1029/2005GL025611
  21. Yoon J-H (1982) Numerical experiment on the circulation in the Japan Sea, Part I. Formation of the East Korean Warm Current. J Oceanogr Soc Japan 38:43-51 (in Korean) https://doi.org/10.1007/BF02110289
  22. Yoon J-H, Kawamura H (2002) The formation and circulation of the intermediate water in the Japan Sea. J Oceanogr 58:197-211 https://doi.org/10.1023/A:1015893104998
  23. Yoon J-H, Kim Y-J (2009) Review on the seasonal variation of the surface circulation in the Japan/East Sea. J Mar Sys 78:226-236 https://doi.org/10.1016/j.jmarsys.2009.03.003
  24. Yun J-Y, Magaard L, Kim K, Shin C-W, Kim C, Byun S-K (2004) Spatial and temporal variability of the North Korean Cold Water leading to the near-bottom cold water intrusion in Korea Strait. Prog Oceanogr 60:99-131 (in Korean) https://doi.org/10.1016/j.pocean.2003.11.004

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