DYNAMICS OF THE SOIL CO2 EMISSION DURING SNOW-FREE PERIOD IN THE IN MIDDLE TAIGA ZONE OF CENTRAL SIBERIA.

The soil is a major reservoir for carbon (C) in biosphere, containing globally twice as much C as the atmosphere and three times as much as vegetation. Soil CO₂ efflux is highly sensitive to changes in surface temperature and relatively small changes in surface temperature may have a major influence on the magnitude of soil efflux. The potential increase in CO₂ release from the soil caused by future elevated temperature may have a positive feedback effect on the atmospheric CO₂ and global changes. For estimation of C budgets in target ecosystems, we must be able to account for small-scale spatial variation in soil respiration. Vegetation models require incorporating both temporal and spatial variation of soil respiration and scaling-up the chamber measurements of soil respiration to ecosystem level. In the this study, were compared different underline surfaces due to the soil CO₂ emission and identified the main driving factors of soil CO₂ emission there. It was created the model which combines the meteorological parameters of whole area and local specific features of each ecosystem. [ABSTRACT FROM AUTHOR]