Behavior of HOx radicals in Ozone Depletion Events during OASIS-Barrow 2009
Abstract
OASIS-Barrow 2009 was a surface-based measurement campaign designed to examine in detail the chemistry and physics of springtime ozone depletion. From late February to late April 2009, the technique of selected-ion chemical ionization mass spectrometry (SICIMS) was used to quantify the abundances of OH, HO2 and HO2+RO2 by our team. Other groups observed ozone, nitrogen oxides, volatile organic compounds, solar radiation, halogen-containing compounds, formaldehyde, aerosol properties and other composition and physical properties of the snow and lower atmosphere. Using the suite of preliminary observations, the roles and behavior of OH, HO2 and RO2 radicals are examined as ozone is depleted. HOx radical ratios are impacted by the presence of halogen-containing radicals and their reservoirs, and these ratios may be used to constrain the abundance of reactive halogen species. This study along with many others over the past 30 years leads to better understanding of the details of ozone depletion in the Arctic springtime.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2009
- Bibcode:
- 2009AGUFM.A31C0111C
- Keywords:
-
- 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0322 ATMOSPHERIC COMPOSITION AND STRUCTURE / Constituent sources and sinks;
- 0365 ATMOSPHERIC COMPOSITION AND STRUCTURE / Troposphere: composition and chemistry