Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Holocene Variations of Organic Carbon Contents in Lake Langer of King George Island, South Shetland Islands, West Antarctica

  • Khim, Boo-Keun (Department of Marine Science, Pusan National University) ;
  • Yoon, Ho-Il (Korea Polar Research Institute, KORDI) ;
  • Kang, Cheon-Yun (Korea Polar Research Institute, KORDI) ;
  • Zhao, Junlin (Institute of Polar Environment, University of Science and Technology of China)
  • Published : 2004.09.30
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Abstract

A sediment core drilled from Lake langer on King George Island was analyzed for a variety of textural md geochemical properties along with $^{14}C$ age dates. These data were combined with published records of other cores to provide a detailed history of Holocene variation of total organic carbon (TOC) contents with respect to terrestrial paleoclimate change. The lithologic contrast of the lower diamicton and upper fine-grained sediments shows the glacier activity and subsequent lake formation. Low TOC contents fluctuated during the diamicton deposition whereas the increase of TOC began with the lake formation during the postglacial period that started about 5,000 yr B.p More notable are the distinct TOC peaks that may imply enhanced primary productivity during the warm period. The uniform and low TOC contents may reflect the limited productivity during the evolution of the lake. However, the recent TOC readvance clearly indicates gradual warming on King George Island. However, the paleoclimatic signature in the terrestrial lake environment during the Holocene seems to be subtle and less distinct, compared to the marine environment.

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References

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