DETECTION AND ANALYSIS OF THE SURFACE BIOTIC SIGNAL IN ATMOSPHERIC CO2 MONITORING SERIES

M. Ya. Antonovskii, V. M Bukhshtaber, and V. A. Pivovarov

The work is devoted to the detection of the surface biotic signal in atmospheric CO2 monitoring data. The main purpose is to identity and substantiate such statistically stable indices that can be used for the solution of problems on natural environment and climate change. The behavior of the given series in the vicinity of local maximums and minimums makes possible the assessment of the space-time and temporal nonstationarity of the CO2 concentration field caused by the dynamics of biota. An important characteristic of this dynamics is a month-to-month distribution of maximum and minimum values of seasonal cycles of the atmospheric CO2 concentration. Based on a joint analysis of atmospheric CO2 series and net ecosystem production estimates it is shown that the contribution of biota to the seasonal cycle of atmospheric CO2 concentrations is statistically significant and essentially depends on the location of a monitoring station.