Ocean and Polar Research

  • 제26권4호
  • /
  • Pages.595-606
  • /
  • 2004
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  • 1598-141X(pISSN)
  • /
  • 2234-7313(eISSN)
한국해양과학기술원 (Korea Institute of Ocean Science & Technology)
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하계 대한해협 저층냉수의 물리.화학적인 특성 및 기원

Physicochemical Properties and the Origin of Summer Bottom Cold Waters in the Korea Strait

  • 김일남 (부산대학교 자연과학대학 해양과학과) ;
  • 이동섭 (부산대학교 자연과학대학 해양과학과)
  • Kim, Il-Nam (Department of Marine Science, College of Natural Science Pusan National University) ;
  • Lee, Tong-Sup (Department of Marine Science, College of Natural Science Pusan National University)
  • 발행 : 2004.12.31
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초록

Hydrographic survey in the Korea Strait has long history that has begun in August 1917 at the Busan - Tsushima cross section, still continues to date. However, chemical properties of bottom cold water found exclusively in the western channel of the Korea Strait during summer did not receive much scientific attention. The aim of the study is to decipher the enigmatic origin of the Korea Strait Bottom Cold Water (KSBCW) in terms of chemical properties. The physicochemical properties of the KSBCW are extracted from the CREAHS II hydrographic data. OMP method was applied to analyze origin of the KSBCW quantitatively. The KSBCW is well defined by low temperature below $10^{\circ}C$. The cold waters exhibited the local presence near the coast at about 120m depth with a thickness of 20m to 30m. The cold water was characterized by relatively cold, saline and higher chemical concentrations than adjacent waters. The KSBCW seems to have different origin kom that of the coastal upwelled waters at the Ulgi-Gampo because it is saline, denser and contains considerably less dissolved oxygen than upwelled waters. The physicochemical properties are reported to have noticeable annual variations which suggest the complex origin of the KSBCW. OMP analysis show that the KSBCW is a mixture of three water types; TMW (24%), ESIW (36%) and ESPW (40%). Relationship between the KSBCW and the east Sea circulation is traced by mapping the water masses that have similar T, S and DO of KSBCW. The result showed that the KSBCW is most possibly an extension of southward flowing coastal intermediate waters. Front these results, we expect that the monitoring KSBCW will provide us valuable information about the East Sea circulation.

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피인용 문헌

  1. Nutrient distribution and effects on phytoplankton assemblages in the western Korea/Tsushima Strait vol.47, pp.1, 2013, https://doi.org/10.1080/00288330.2012.718284
  2. Variability of the Coastal Current off Uljin in Summer 2006 vol.36, pp.2, 2014, https://doi.org/10.4217/OPR.2014.36.2.165
  3. The Influences of Coastal Upwelling on Phytoplankton Community in the Southern Part of East Sea, Korea vol.19, pp.4, 2014, https://doi.org/10.7850/jkso.2014.19.4.287
  4. Temporal Variation of Phytoplankton Community Related to Water Column Structure in the Korea Strait vol.32, pp.3, 2010, https://doi.org/10.4217/OPR.2010.32.3.321
  5. Metagenomic Approach on the Eukaryotic Plankton Biodiversity in Coastal Water of Busan (Korea) vol.17, pp.2, 2012, https://doi.org/10.7850/jkso.2012.17.2.059
  6. Observations of Bottom Currents in the Korea Strait vol.49, pp.3, 2016, https://doi.org/10.5657/KFAS.2016.0393