Atmospheric Chemistry and Physics Suppression of chlorine activation on aviation-produced

• Main Authors: Volatile Particles, S. K. Meilinger, B. Kärcher, Th. Peter
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2002
• Subjects: North Atlantic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.404.8285; http://hal.archives-ouvertes.fr/docs/00/29/52/08/PDF/acp-2-307-2002.pdf

Abstract. We examine the effect of nanometer-sized aircraft-induced aqueous sulfuric acid (H2SO4/H2O) particles on atmospheric ozone as a function of temperature. Our calculations are based on a previously derived parameterization for the regional-scale perturbations of the sulfate surface area density due to air traffic in the North Atlantic Flight Corridor (NAFC) and a chemical box model. We confirm large scale model results that at temperatures T> 210 K additional ozone loss – mainly caused by hydrolysis of BrONO2 and N2O5 – scales in proportion with the aviation-produced increase of the background aerosol surface area. However, at lower temperatures (< 210 K) we isolate two effects which efficiently reduce the aircraft-induced perturbation: (1) background particles growth due to H2O and HNO3 uptake enhance scavenging losses of aviation-produced liquid particles