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In order to observe CO2 characteristics in the unsaturated zone of loess tableland and further understand the carbon cycle, a series of tubes for gas monitoring and sampling were installed in an approximately 90-m deep Qiushe loess section of Lingtai County, Northwestern China. The results show that the concentration of CO2 was higher in loess than in the atmosphere, reaching a maximum of 6970 μmol·mol...
The authors reviewed the history of geochemistry involved in active volcano monitoring and analyzed the relationship between variations in volcanic gas composition observed at the Changbaishan Volcano Observatory and volcanic activities. It is concluded that both geochemical method and routine gas analysis can provide the information about volcanic activity and earthquake activity, and both of them...
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