Neil Harris' research interests have been based around the analysis and understanding of atmospheric measurements. Areas of interest include long-term trends in ozone, chemical depletion of stratospheric ozone in polar regions (particularly the Arctic), structure of the tropical atmosphere and measurements of trace gases. Until 2010 his main responsibility was the coordination of European research on stratospheric ozone and the UTLS. Currently, his main research interest is the atmospheric chemistry of short-lived halocarbons in the tropical atmosphere, with an emphasis on our own measurement of short-lived halocarbon concentrations in the marine boundary layer in the SE Asian and West Pacific region, iinterpreted in the framework of other measurements sets and with models. He is developing a technique to verify agricultural emissions of greenhouse gases (GHGs) as the basis for estimating agricultural emission reductions as anticipated after 2018.