HR: 0800h
AN: A11C-0596    [Abstracts]
TI: Behavior of Tropospheric Peroxy Radicals during Several Recent Airborne Measurement Campaigns
AU: * Cantrell, C A
EM: cantrell@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Anderson, R S
EM: rsa@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AB: Concentrations of HO₂ and HO₂+RO₂ were measured during several airborne campaigns using a mass spectrometric/chemical conversion technique. MIRAGE and INTEX-B were designed to assess the behavior of urban megacity emissions at close-to-medium range, and at long range, respectively. The PASE campaign examined sulfur chemistry in the remote central Pacific Ocean basin. We will present the results of these studies using a variety of chemical and physical coordinates (e.g. altitude, time, NO concentration) and making use of photochemical model results to assess our understanding of free radical chemistry over the variety of conditions encountered during these studies.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting