Articles | Volume 10, issue 3
Research article
02 Sep 2019
Research article |  | 02 Sep 2019

Characteristics of soil profile CO2 concentrations in karst areas and their significance for global carbon cycles and climate change

Qiao Chen

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Cited articles

Bajracharya, R. M., Lai, R., and Kimble, J. M.: Erosion effects on carbon dioxide concentration and carbon flux from an Chio Alfisol, Soil Sci. Soc. Am. J., 64, 694–700, 2000. 
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Cao, J. H., Pan, G. X., and Yuan, D. X.: Simulation experiments on dissolution of calcite by citric and its karst importance, Carsologica Sinica, 20, 1–4, 2001 (in Chinese). 
Chen, Q. Q., Sun, Y. M., Shen, C. D., Peng, S. L., Yi, W. X., Jiang, M. T., and Li, Z. A.: Quantitative study on organic matter turnover characteristics of mountainous soil profiles in the subtropical area, south China, Scientia Geographical Sinica, 22, 196–201, 2002 (in Chinese). 
Short summary
The missing carbon sink is puzzling since carbon cycle is related to global climate. The varying characteristics of soil profile CO2 concentration in carbonate areas and noncarbonates were investigated, together with pH, SOC, and isotope. It is found that carbonate corrosion deeply consumes soil CO2, which accounts for an average of 36 %. Such a process is important for karst carbon cycles and global climate changes, and may be a potential part of the missing sink.
Final-revised paper