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Carbon stable isotopic composition of karst soil CO2 in central Guizhou, China

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Abstract

The δ13c values of soil CO2 are less than that of atmosphere CO2 in the karst area. On the soil-air interface, the δ13c vlaues of soil CO2 decrease with the increase in soil depth; below the soil-air interface, the δ13c values of soil CO2 are invariable. The type of vegetation on the land surface has an influence on the δ13C values of soil CO2. Due to the activity of soil microbes, the δ13C values of soil CO2 are variable with seasonal change in ps. Isotopic tracer indicates that atmosphere CO2 has a great deal of contribution to soil CO2 at the lower parts of soil proflie.

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Project supported by the National Natural Science Foundation of China (Grant Nos. 49703048 and 49833002)

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Zheng, L. Carbon stable isotopic composition of karst soil CO2 in central Guizhou, China. Sci. China Ser. D-Earth Sci. 42, 588–594 (1999). https://doi.org/10.1007/BF02877786

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  • DOI: https://doi.org/10.1007/BF02877786

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