Imaging the Near-Surface Gas Phase: A New Approach to Coupled Gas-Surface Chemistry
Abstract not provided.
Publications
The reaction of hydroxyl and methylperoxy radicals is not a major source of atmospheric methanol
Nature Communications
Methanol is a benchmark for understanding tropospheric oxidation, but is underpredicted by up to 100% in atmospheric models. Recent work has suggested this discrepancy can be reconciled by the rapid reaction of hydroxyl and methylperoxy radicals with a methanol branching fraction of 30%. However, for fractions below 15%, methanol underprediction is exacerbated. Theoretical investigations of this reaction are challenging because of intersystem crossing between singlet and triplet surfaces – ∼45% of reaction products are obtained via intersystem crossing of a pre-product complex – which demands experimental determinations of product branching. Here we report direct measurements of methanol from this reaction. A branching fraction below 15% is established, consequently highlighting a large gap in the understanding of global methanol sources. These results support the recent high-level theoretical work and substantially reduce its uncertainties.
Design of the CRF-PEPICO
Abstract not provided.
Design of the CRF-PEPICO a next generation multiplexed spectrometer for studying gas-phase kinetics of combustion and atmospheric reactions
Abstract not provided.
4 Results