Professor Mathew Evans

Phone: 01904 324188


Atmospheric Chemistry

Mathew Evans is a professor of Atmospheric Chemistry Modelling in the Wolfson Atmospheric Chemistry Laboratories of the University of York’s Chemistry Department. His research focusses on the numerical modelling of atmospheric chemistry so that we can better understand air pollution and climate change. Mathew also teaches part of the 1st year kinetics course and some of the 3rd year atmospheric chemistry course.


My research interests lie in understanding the composition of the atmosphere - what is it made of. Do do this we need to quantitatively understand the chemical, physical and biological processes which influence this composition and how they may have changed in the past and may change in the future. This is important for understanding and so providing policy information for air quality, climate change, and ecosystem degradation.

The primary tool for this research is the GEOS-Chem model. This is a community, open source model of the chemistry of the atmosphere. My group uses the model to improve our understanding of the composition of the atmosphere especially the chemistry occurring within it. We do this through our involvement in field campaigns around the world (Mid-pacific, West Africa, Borneo) and laboratory experiments.

Recent interest has focussed on the chemistry of halogens (Cl, Br, I) in the lower atmosphere, the chemistry of oxides of nitrogen in the remote atmosphere and the influence of clouds on atmospheric composition.

I also have interests in looking at new tools to understand this chemistry using spectral methodologies, ensemble approaches, graph theory or machine learning.

Career Summary


Selected publications (for a full list see the York Research database link in the right-hand column)


  • Effects of halogens on European air-quality, T. Sherwen et al., Faraday Discussions, 200, 75-100, 2017, DOI:10.1039/C7FD00026J
  • Global impacts of tropospheric halogens (Cl, Br, I) on oxidants and composition in GEOS-Chem. T. Sherwen, et al., Atmospheric Chemistry and Physics, 2016. DOI:10.5194/acp-16-12239-2016
  • Active and widespread halogen chemistry in the tropical and subtropical free troposphere, S. Wang, PNAS, 112, 30, 9281–9286, DOI:10.1073/pnas.1505142112


  • A meteorological and chemical overview of the DACCIWA field campaign in West Africa in June--July 2016. P. Knippertz et al., Atmospheric Chemistry and Physics, 2017. DOI:10.5194/acp-2017-345
  • The possible role of local air pollution in climate change in West Africa. P. Knippertz et al., Nature Climate Change, 5, 815-822, 2015,  DOI:10.1038/nclimate2727

Technical approaches:

  • Spectral analysis of atmospheric composition: application to surface ozone model-measurement comparisons. D. Bowdelo et al.,  Atmospheric Chemistry and Physics, 2016. DOI:10.5194/acp-16-8295-2016
  • Impact of uncertainties in inorganic chemical rate constants on tropospheric composition and ozone radiative forcing, B. Newsome and M. Evans, Atmospheric Chemistry and Physics, 2017, DOI:10.5194/acp-2017-12



  • Tomas Sherwen
  • Killian Murphy
  • Shani Garraway
  • Eleanor Morris
  • Daniel Ellis
  • Peter Ivatt
  • Katie Smith
  • Ryan Pound


  • Helen Macintyre
  • Roisine Commane
  • Peter Edwards.
  • Dene Bowdelo
  • Ben Newsome
  • Tim Garstin

Awards and Activities