Climate change dominates recent sedimentation and organic carbon burial in Lake Chenghai, southwest China

Climate change dominates sedimentation and carbon burial

  • Weiwei Sun Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, China.
  • Qingfeng Jiang Nantong University, School of Geography Sciences, China.
  • Enfeng Liu Shandong Normal University, College of Geography and Environment, China.
  • Jie Chang Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, China.
  • Enlou Zhang | elzhang@niglas.ac.cn Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, China.

Abstract

Lacustrine ecosystems are directly influenced by terrestrial soil erosion, and excessive sediment loading constitutes a significant and widespread environmental issue. In order to investigate the response of catchment soil erosion and organic carbon burial to climate change and human activity, a sediment core spanning the last 160 years was retrieved from Lake Chenghai in southwest China. Multi-proxy analysis including grain-size composition and geochemical indicators were undertaken in this study. The result of grain-size vs standard deviation method shows that the sensitive component with a modal size of 13.2 μm is related to fluvial processes and sensitive to the catchment soil erosion. The increasing intensity of soil erosion was mainly determined by the weakening of Indian summer monsoon and global warming, as well as intensive human activities during the middle of 20th century, which resulted in decreasing vegetation cover in Lake Chenghai catchment. The organic carbon burial rate was also attributed to the catchment disturbance, indicating that increased catchment soil erosion may impact the terrestrial carbon recycling.

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Author Biography

Enlou Zhang, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences
No
Published
2018-05-11
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Original Articles
Keywords:
Soil erosion, lacustrine sediment, climate change, human activity, carbon burial.
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How to Cite
1.
Sun W, Jiang Q, Liu E, Chang J, Zhang E. Climate change dominates recent sedimentation and organic carbon burial in Lake Chenghai, southwest China: Climate change dominates sedimentation and carbon burial. J Limnol [Internet]. 2018May11 [cited 2020Jun.6];77(3). Available from: https://www.jlimnol.it/index.php/jlimnol/article/view/jlimnol.2018.1762