Fifteen Years of Stratospheric Nitrogen Dioxide and Ozone Measurements in Antarctica

摘要

The stratospheric NO_2 and O_3 total columns and vertical profiles retrieved from the measurements performed the last 15 years by the GASCOD spectrometer installed at the Mario Zucchelli Antarctic Station (MZS) - 74.69S, 164.12E, are presented here and briefly discussed. The full dataset of the spectral data obtained with GASCOD during the period 1996-2009, was re-analyzed with a modified version of the software tool previously utilized. The uncertainties range from 4% up to 8% for O_3 and from 3% tup o 6% for NO_2. The peculiar features of the seasonal variation of O_3 (i.e. during the 'Ozone Hole' periods (mid-August to mid-October) and NO_2 total columns (i.e. the normal decreasing during the austral fall and the irregular growing towards the spring months) are clearly identified. For the first time, the NO_2 total columns values, obtained with the GASCOD installed at MZS, are compared with the data obtained with satellite borne equipments (SCIAMACHY, GOME and OMI).