Temporal and spatial variations of a

Temporal and spatial variations of atmospheric methane concentration and δ13C-CH4 near the surface on the Millor Peninsu

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 summertime 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.

作 者： Liu Yashu Zhu Renbin Li Xianglan Xu Hua Sun Liguang   作者单位： Liu Yashu,Zhu Renbin,Sun Liguang(Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, China)

Li Xianglan,Xu Hua(State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Science, Nanjing 210091, China) 

刊 名： 极地研究（英文版）  英文刊名： CHINESE JOURNAL OF POLAR SCIENCE  年，卷(期)： 2009 20(1)  分类号： P4  关键词： Antarctica   Millor Peninsula   atmosphere   methane   carbon isotope