What is the reactivity of marine atmospheric aerosol to oxidation? A study of twelve monthly samples from a remote Atlantic station.


The Earth's climate is strongly influenced by clouds. The oxidative processing of pollutants in clouds affects droplet size and optical properties, important effects. Common cloud pollutants are naturally occurring organic surfactants forming organic films on the droplet, The climatic effect depends on the rate of atmospheric oxidation of these films and whether any product film forms. In this work we will study the kinetics of hydroxyl radical with insoluble surfactants from samples from mid-Atlantic. Specifically we will (a) demonstrate that an aqueous cloud oxidant, the OH radical, can oxidise a real atmospheric organic film with different provenances, b) calculate the effect of the reaction on the hygroscopic properties of a cloud droplet and demonstrate removal of the organic film may cause a cloud to evaporate (c) Support an STFC futures grant.

DOI https://doi.org/10.5286/ISIS.E.RB1910442-1
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/103215490
Creator Dr Katherine Thompson; Mr Connor Barker; Mr Tobias Robson; Dr Thomas Arnold; Professor Adrian Rennie; Dr Rebecca Welbourn; Professor Martin King; Dr Andy Ward
Publisher ISIS Neutron and Muon Source
Publication Year 2022
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Resource Type Dataset
Discipline Chemistry; Natural Sciences
Temporal Coverage Begin 2019-06-20T08:00:00Z
Temporal Coverage End 2019-06-24T11:37:02Z