ИСТИНА

Based on the regression analysis among more than 10 characteristics (hydrothermal, geocryological, soil) for CALM R1 site was revealed a high and significant correlation soil carbon dioxide efflux only with the active layer thickness (r=0,45, p-level<0,05; y=112 +0,13*x) and microbial carbon (r=0,25, p-level<0,05; y=90 +0,20*x). Water-extractable organic carbon was correlated with total organic carbon (r=0,47, p-level<0,05; y=456+30*x) and soil moisture content (r=0,62, p-level<0,05; y=-254+28*x). Microbial carbon was correlated with total organic carbon (r=0,62 , p-level<0,05; y=352+123*x) and soil moisture content (r=0,70, p-level<0,05; y=-1481+97*x). We consider the main factor, which determine the soil carbon efflux is the depth of permafrost table; it determines the type of ecosystem in such transitional landscapes and organic matter transformation processes. Underestimation of the spatial variability of soil and vegetation cover in the region of discontinuous permafrost can lead to substantial distortion of estimates of the total greenhouse gases balance.