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Research Description

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.

1. Simpson, W. R., L. Alvarez-Aviles, T. A. Douglas, M. Sturm, and F. Domine (2005), Halogens in the coastal snow pack near Barrow, Alaska: Evidence for active bromine air-snow chemistry during springtime, Geophys. Res. Lett., 32, L04811.
2. Ayers, J. D., and W. R. Simpson (2006), Measurements of N2O5 near Fairbanks, Alaska, J. Geophys. Res., 111, D14309.
3. Ayers, J. D., R. L. Apodaca, W. R. Simpson, and D. S. Baer (2005), Off-axis cavity ringdown spectroscopy: application to atmospheric nitrate radical detection, Appl. Optics., 44, 7239-7242.

phone: 907.474.7235
fax: 907.474.5640
email:wrsimpson@alaska.edu
William Simpson
Department of Chemistry & Biochemistry
University of Alaska Fairbanks
Fairbanks, AK 99775-6160