Hemispheric trends of CO2 and O3 and carbon isotope measurements of discrete sample of atmospheric CO2

The comparison of the results of continuous measurements of CO(2) and O(3) concentrations in the atmosphere, carried out along three ship-courses from Europe to Antarctica allows an evaluation of the actual growing-rate of atmospheric CO(2) concentration in different latitudinal belts while tropospheric ozone concentration measurements support the hypothesis of an anthropogenic origin at high latitudes and with an hemisphere-wide effect. Carbon isotope measurements of atmospheric CO(2) from flask air samples show an unexpected and marked negativization of the delta (13)C values across the Antarctic Convergence Area. The hypothesis of a biochemical origin of these light isotopic values is suggested.