Abstract
Abstract The methane concentration profile from –1.5m depth in soil to 32m height in air was measured in alpine steppe located in the permafrost area. Methane concentrations showed widely variations both in air and in soil during the study period. The mean concentrations in atmosphere were all higher than those in soil, and the highest methane concentration was found in air at the height of 16m with the lowest concentration occurring at the depth of 1.5m in soil. The variations of atmospheric methane concentrations did not show any clear pattern both temporally and spatially, although they exhibited a more steadystable state than those in soil. During the seasonal variations, the methane concentrations at different depths in soil were significantly correlated (R2>0.6) with each other comparing to the weak correlations (R2<0.2) between the atmospheric concentrations at different heights. Mean methane concentrations in soil significantly decreased with depth. This was the compositive influence of the decrea...
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