I am a Senior Lecturer at the Department of Mathematics and Global Systems Institute at the University of Exeter.

I am interested in understanding the large-scale dynamics of the atmosphere and oceans of Earth (and sometimes other planets too). I use a combination of idealised models, comprehensive general circulation models, and observational data. My current particular interests include:

  • Polar vortex dynamics on Earth, Mars, and Titan
  • Jet stream and Hadley cell variability
  • Stratospheric ozone depletion
  • Southern Ocean-atmosphere interactions

I currently have two fully-funded PhD studentship opportunities available. Do get in touch if you are interested in these opportunities.

  1. On The Atmospheric Dynamics of Tropical Expansion, for which I’m the lead supervisor and Stephen Thomson is a co-supervisor. Deadline: 24 January 2022
  2. On Effects of rapid Arctic climate change on jet streams and extreme weather, for which Stephen Thomson is the lead supervisor, and I am one of the co-supervisors. Deadline: 10 January 2022


I joined Exeter in June 2020, following a PhD in Atmospheric, Oceanic, and Planetary Physics at Oxford, almost four years as a postdoc in the Department of Earth and Planetary Sciences at Johns Hopkins University, and 18 months as a research fellow in the School of Geographical Sciences at the University of Bristol (where I still have an honorary affiliation).

For all the gory details, you can download my CV (pdf) here.

Contact details:


Dr William J. M. Seviour
Department of Mathematics
Harrison Building
Streatham Campus
University of Exeter
North Park Road
Exeter EX4 4QF
United Kingdom