The Heterogeneous Reactions of NO3 with Multicomponent Mixtures and Their Atmospheric Implications
Abstract
The NO3 radical is an important nighttime oxidant in the troposphere. There have been several previous studies which suggest the heterogeneous reaction of NO3 with organic substrates is important in the troposphere under certain conditions. However, all of these studies have only been carried out on single component systems. To our knowledge there is no published work dealing with reactions of NO3 with multicomponent or multiphase systems. Given the complexity of organic aerosols in the troposphere, multicomponent and multiphase systems are expected to better mimic atmospheric particles than would pure organics. Thus, in this study we investigated the heterogeneous reactions of NO3 with multicomponent mixtures in multiphase systems. The main focus of this study was to determine reactive uptake coefficients for NO3 on these different mixtures. Results from these studies will be presented. Through the use of uptake coefficients, oxidation lifetimes of the reactants within different mixtures can be estimated for tropospheric conditions.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2010
- Bibcode:
- 2010AGUFM.A11F0117B
- Keywords:
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- 0305 ATMOSPHERIC COMPOSITION AND STRUCTURE / Aerosols and particles;
- 0335 ATMOSPHERIC COMPOSITION AND STRUCTURE / Ion chemistry of the atmosphere