The main focus of my research is on improving the knowledge of the physics and chemistry of atmospheric aerosols. Aerosol particles play key roles in climate change, through reflecting and absorbing solar and infra-red radiation and by acting as sites for the formation of cloud droplets; in air pollution, being linked closely with impacts on human health; and on the transport of pollutants and nutrients on regional or even global scales. My current research interests include: biomass burning and dust aerosols; the long range transport of pollution aerosol; aerosol-cloud interactions; organic aerosol; transformation and transport of aerosols on urban to regional scales.

I chair the joint NERC/Met Office FAAM aircraft operations committee and am a current member of the NERC FAAM Board. I hold associate editorsips of the Quarterly Journal of the Royal Meteorological Society and Aerosol Science and Technology. I am a committee Member of The Aerosol Society and a member of the following learned societies: the American Association of Aerosol Research; the American Geophysical Union; and the Gesellschaft fur Aerosolforschung (GeAF). I am a Fellow of the Royal Meteorological Society.