Influence of Hydrological Regime on Carbon Dioxide Fluxes over Oligotrophic Bog Massif in Northwestern Russia

I. L. Kalyuznyi and S. A. Lavrov

It is found that the surface bog temperature and bog water level position are major factors that determine CO2 emission from the bog massif. The emission intensity increases with increasing temperature and with a bog water level decrease. The dependence of CO2 emission is shown to be different for each bog microlandscape. Monthly mean CO2 emissions are given for the central bog massif in the years with different water content. Based on modeling, it is shown that in the case of a low bog water level the CO2 flux is directed to the atmosphere (the emission value exceeds the gas amount consumed for photosynthesis), while in the case of a high level, it is taken up by the growing plants.