A 3600 years paleoclimatic change inferred from organic δ13C and TOC/TN of the Gucheng Lake sediments, southeast China |
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| Authors: | Shen Ji Ryo Matsumoto Wang Su-min |
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| Institution: | (1) Geological Institute, University of Tokyo, Hongo, 113 Tokyo, Japan;(2) Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 21008 Nanjing |
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| Abstract: | A 6.2 m thick core of Gucheng Lake sediment provided a 3600 years record of climate change. The contents of the TOC in the
core changed from 2.63% to 8.48%, and the δ13C values of organic matter were from −21.54% to −27.3%. The TOC/TN ratios indicated that the organic materials in sediments
were from lake plankton and land-derived plants.
The 2.9–22 m core interval with high TOC/TN ratios, low δ13C values and low contents of TOC indicated a cold climate stage. The 6.2–5.5 m and 0.4–0.1 m intervals were characterized
by low TOC/TN ratios, high δ13C values and high contents of TOC, and reflected temperate climate stages.
Project 49372129 supported by NSFC. |
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| Keywords: | organic carbon isotope paleoclimate Gucheng Lake |
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