Atmospheric Chemistry and Physics Differences in Arctic and Antarctic PSC occurrence as observed by

• Main Authors: Atmos Chem Phys, Mcmurdo S, M. Maturilli, R. Neuber, P. Massoli, F. Cairo, A. Adriani, M. L. Moriconi, G. Di Donfrancesco
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2005
• Subjects: Antarctic; Arctic; McMurdo Station; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.404.9254; http://hal.archives-ouvertes.fr/docs/00/29/57/14/PDF/acp-5-2081-2005.pdf

Abstract. The extent of springtime Arctic ozone loss does not reach Antarctic “ozone hole ” dimensions because of the generally higher temperatures in the northern hemisphere vortex and consequent less polar stratospheric cloud (PSC) particle surface for heterogeneous chlorine activation. Yet, with increasing greenhouse gases stratospheric temperatures are expected to further decrease. To infer if present Antarctic PSC occurrence can be applied to predict future Arctic PSC occurrence, lidar observations from McMurdo station (78 ◦ S, 167 ◦ E) and Ny ˚Alesund (79 ◦ N, 12 ◦ E) have been analysed for the 9 winters between 1995 (1995/1996) and 2003 (2003/2004). Although the statistics may not completely cover the overall hemispheric PSC occurrence, the observations are considered to represent the main synoptic cloud features as both stations are mostly situated in the centre