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 δ13C-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 summer-time variation of CH4 concentrations showed a large fluctuation, corresponding to the variation of air temperatures. The average δ13C-CH4 was (-38.26±0.52)‰. CH4 concentrations and δ13C-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 δ13C-CH4 values have also been discussed in this study.
Temporal and spatial variations of a tmospheric methane concentration and δ13C-CH4 near the surface on the Millor Peninsula, East Antarctica
Vol. 20, Issue 1, pp. 22-31 (2009) • CNKI:SUN:JDYJ.0.2009-01-003