Atmospheric CH4 Concentrations from the Commonwealth Scientific and Industrial Research Organization (CSIRO) GASLAB Flask Sampling Network (1984 - 2001)

The listed data were obtained from flask air samples returned to the CSIRO GASLAB for analysis. Typical sample storage times ranged from days to weeks for some sites (e.g., Cape Grim) to as much as one year for Macquarie Island and the Antarctic sites. Experiments carried out to test for any change in sample CH4 mixing ratio during storage have shown no drift to within detection limits over test periods of several months to years (Cooper et al., 1999).所列数据来源于送回CSIRO GASLAB进行分析的瓶式空气样本。不同站点的样本储存时间差异较大：部分站点（如格里姆角）的储存时间通常为几天至几周，而麦夸里岛及南极站点的储存时间最长可达一年。为测试储存期间样本甲烷（CH4）混合比是否发生变化而开展的实验表明，在数月至数年的测试周期内，混合比未出现超出检测限的漂移（Cooper等，1999）。