摘要
During the 22nd Chinese Antarctic Research Expedition （ CHINARE-22, 2005/06） , the atmospheric gas samples near the surface were taken on the Millor Peninsula and adjacent areas, east Antarctica, using Tedlar gas bags. The methane （ CH4 ） concentration and δ^13C-CH4 in those samples were analyzed in the laboratory. The average value of atmospheric CH4 concentration on this peninsula was （ 1.87 ± 0. 12） × 10^ -6, slightly higher than the global average CH4 concentration. The summertime variation of CH4 concentrations showed a large fluctuation, corresponding to the variation of air temperatures. The average δ^13 C-CH4 was （ - 38.26 ± 0.52 ） ‰. CH4 concentrations and δ^13C-CH4 at different sites varied from 1.74 ×10^-6 to 2. 56 × 10^ -6 and from - 39.31‰ to - 31.25‰, respectively. The factors affecting CH4 concentrations and δ^13C-CH4 values have also been discussed in this study.
During the 22nd Chinese Antarctic Research Expedition （ CHINARE-22, 2005/06） , the atmospheric gas samples near the surface were taken on the Millor Peninsula and adjacent areas, east Antarctica, using Tedlar gas bags. The methane （ CH4 ） concentration and δ^13C-CH4 in those samples were analyzed in the laboratory. The average value of atmospheric CH4 concentration on this peninsula was （ 1.87 ± 0. 12） × 10^ -6, slightly higher than the global average CH4 concentration. The summertime variation of CH4 concentrations showed a large fluctuation, corresponding to the variation of air temperatures. The average δ^13 C-CH4 was （ - 38.26 ± 0.52 ） ‰. CH4 concentrations and δ^13C-CH4 at different sites varied from 1.74 ×10^-6 to 2. 56 × 10^ -6 and from - 39.31‰ to - 31.25‰, respectively. The factors affecting CH4 concentrations and δ^13C-CH4 values have also been discussed in this study.
基金
supported by the National Natural Science Foundation(No.40676005 and No.40730107)
the Open Foundation for Key Laboratory of Polar Science(No.KP2008004)
