Fifteen Years of Stratospheric Nitrogen Dioxide and Ozone Measurements in Antarctica

摘要

The stratospheric NO2and O3total columns and vertical profiles retrieved fromthe measurements performedthe last 15 years by the GASCOD spectrometer installed at theMarioZucchelli Antarctic Station (MZS)-74.69S,164.12E,are presentedhereand briefly discussed.The full dataset of the spectral data obtained with GASCOD during theperiod 1996-2009, was re-analyzed with a modified version of the software tool previously utilized. The uncertaintiesrange from 4%upto 8% for O3andfrom3% tupo 6% for NO2. The peculiar features of the seasonal variation of O3(i.e.during the ‘Ozone Hole’ periods (mid-August to mid-October) and NO2total columns (i.e. the normal decreasing duringthe austral fall and the irregular growing towards the spring months) are clearly identified. For the first time, the NO2total columns values, obtained with the GASCOD installed at MZS, are compared with the data obtained with satelliteborne equipments (SCIAMACHY,GOMEandOMI).