Temporal and spatial variations of atmospheric methane concentration and δ^(13)C-CH_4 near the surface on the Millor Peninsula,East Antarctica  

作　　者：刘雅淑 朱仁斌 李香兰 徐华 孙立广 

机构地区：[1]Institute of Polar Environment,University of Science and Technology of China [2]State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Science

出　　处：《Chinese Journal of Polar Science》2009年第1期22-31,共10页极地研究（英文版）

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)

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.

关 键 词：ANTARCTICA Millor Peninsula ATMOSPHERE METHANE carbon isotope. 

分 类 号：P402[天文地球—大气物理学与大气环境]