Bill Simpson

Atmospheric Science
Our research group investigates Arctic radical chemistry through field measurements of trace gases and reactive radicals. We have developed and deployed spectroscopic instruments, including laser-based instruments using cavity ring-down spectroscopy and passive optical absorption instruments. Understanding of radical chemistry in the Arctic is critical for determining the fate of pollutants in the Arctic, including organics and mercury, and how this fate may change in a rapidly changing Arctic. For more information, visit our group webpage:
Current Positions: 
Present Research Interests: 
  • Atmospheric Chemistry
  • Climate Change
  • Snow/Ice Chemistry
  • Environmental Chemistry
  • Arctic Pollution
Selected Pubs: 
  • Simpson, W. R.; Brown, S. S.; Saiz-Lopez, A.; Thornton, J. A.; and von Glasow, R.: Tropospheric Halogen Chemistry: Sources, Cycling, and Impacts, Chemical Reviews, Published online ASAP. doi:10.1021/cr5006638, 2015.
  • Peterson, P. K., Simpson, W. R., et al.: Dependence of the vertical distribution of bromine monoxide in the lower troposphere on meteorological factors such as wind speed and stability, Atmos. Chem. Phys., 15, 2119-2137, doi:10.5194/acp-15-2119-2015, 2015
  • Pratt, K. A., et al.: Photochemical production of molecular bromine in Arctic surface snowpacks, Nature Geoscience 6, 351–356, (2013). doi:10.1038/ngeo1779
  • See for more publications