Observational evidence of rapid chlorine activation by mountain waves above northern Scandinavia

摘要: GOME observations with radiative transfer calculations, the corresponding vertical column densities are derived, and by applying pressure temperature profiles from mesoscale simulations, mixing ratios for OClO ClO at different altitude levels estimated. The of indicate a level chlorine activation that is about two times higher compared to days before mountain wave event, deduced imply was almost completely activated over wide range. area showing enhanced values increased approximately 750.000 km 2 which more than 3% polar vortex (� 23.0 * 10 6 ). These in good agreement previous model studies, where comparable increases areas were calculated. case 21 January 1997 similar other Arctic winters confirm importance stratospheric waves species northern hemisphere. INDEX TERMS: 0340 Atmospheric Composition Structure: Middle atmosphere—composition chemistry; 0341 atmosphere—constituent transport chemistry (3334); 3329 Meteorology Dynamics: Mesoscale meteorology; 3360 Remote sensing; KEYWORDS: GOME, waves,