We have
conducted long-term regular monitoring of vertical profiles of 13C/12C
ratio of atmospheric CO2 over three sites in Siberia and a site in Japan.
Time-series and seasonality of the 13C/12C ratio at each
altitude levels at the four site were examined. Apparent isotopic signature was
calculated from the relationship between CO2 mixing ratio and the 13C/12C
ratio in individual vertical profiles.
Author: Y. Takahashi, T. Machida, T. Watai, G. Inoue, et al (yoshiyu at nies dot go dot jp)
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