The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Degree of saturation of $(CaCO_3)$ in the East Sea

동해의 탄산칼슘$(CaCO_3)$ 포화도

  • Kang, Dong-Jin (OCEAN Laboratory/RIO/SEES, College of Natural Sciences, Seoul National University) ;
  • Kim, Kyung-Ryul (OCEAN Laboratory/RIO/SEES, College of Natural Sciences, Seoul National University) ;
  • Lee, Kyung-Eun (OCEAN Laboratory/RIO/SEES, College of Natural Sciences, Seoul National University)
  • 강동진 (서울대학교 자연과학대학 지구환경과학부 해양연구소/해양순환계 연구실) ;
  • 김경렬 (서울대학교 자연과학대학 지구환경과학부 해양연구소/해양순환계 연구실) ;
  • 이경은 (서울대학교 자연과학대학 지구환경과학부 해양연구소/해양순환계 연구실)
  • Published : 2001.11.30
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Abstract

The degree of saturation of calcium carbonate in the East Sea was calculated from the data obtained from'99 expedition using R/V Roger Revelle. The calcium concentrations in seawaters were estimated from salinity data, and the carbonate ion concentrations were calculated from total alkalinity and pH data. The results suggest that the crossover from the supersaturation to undersaturation for calcium carbonate occur at the depth of approximately 200-400 m for calcite, and 100-300 m for aragonite. Compared to the Pacific and Atlantic oceans, these levels in the East Sea are shallow due to most likely lower temperature of sea water in this region.

1999년 동해 해양 탐사에서 관측된 자료를 이용하여 동해에서 수심에 따른 탄산칼슘의 포화도 변화를 분석하였다. 해수의 칼슘 농도는 염분 측정값으로부터 계산하였으며, 탄산염 농도는 총알칼리도와 수소이온농도 측정값을 이용하여 계산하였다. 동해의 해수는 방해석에 대하여 약 200${\sim}$400m보다 얕은 곳에서는 과포화 되어있고, 그보다 깊은 곳에서는 불포화 되어있다. 아라고나이트의 경우에는 약 100${\sim}$300 m보다 얕은 곳에서는 과포화 되어 있고 그보다 깊은 곳에서는 불포화되어 있다. 대양에 비교하여 동해의 포화깊이가 낮은 이유는 동해의 낮은 수온 때문으로 추정된다.

Keywords

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