Chamber Studies at NCAR


This campaign continues our investigation into the sources and behavior of marine OVOCs. Our previous work with IRCELYON has shown that UV irradiation of fatty acids followed by ozonolysis is a source of OVOCs including glyoxal. The chemical mechanism proceeds through an alkenal intermediate.

We are collaborating with the Tyndall group at NCAR, which has a 47 L temperature-controlled atmospheric chamber monitored by FTIR and GC-FID. Deployment of additional instrument is possible as well. We will observe the product distributions and kinetics of the oxidation of alkenals not just by ozone but also by OH radicals and bromine radicals.

Data from this campaign will enable us to determine whether reaction with OVOCs is a sink for halogen species in the atmosphere.