My research encompasses the broad issues of atmospheric chemistry, composition and dynamics. My work is focused specifically on understanding the role the biosphere has in atmospheric chemistry, particularly how biogenic emissions affect the chemistry of ozone. This gas is in an EPA regulated pollutant that has been implicated in local and regional air quality. My investigations focus on making measurements in the field and then, computer modeling the resultant data in order to understand the complex sources, sinks and reactions of this important atmospheric gas.

Courses Taught at EMU:

Quantitative Analysis (Chem 281)
General Chemistry (Chem 121-124)

Professional Affiliations:

American Chemical Society
American Geophysical Union
Royal Society of Chemistry

Selected Publications:

G.D. Edwards, P.B. Shepson, J.W. Grossenbacher, J.M. Wells, G.E. Patterson, D.J Barket Jr., S. N. Pressley, T. Karl and E. Apel "Development of a Cylindrical Ion Trap Mass Spectrometer for the Measurement of Atmospheric VOC’s" Anal Chem 79 (13): 5040-5050, 2007.

Ren, X., G.D. Edwards, W.H. Brune, C.A. Cantrell, T. Shirley, A. R. Metcalf and R.L. Lesher, "Hydroxyl and Peroxy Radical Chemistry in a Rural Area of Central Pennsylvania: Observations and Model Comparisons" J. Atmos. Chem., DOI: 10.1007/s10874-005-3651-7, 2005.

X.Ren, G.D. Edwards, C. A. Cantrell, R. Lesher and W.H. Brune, Peroxy Radical measurement by CIMS and LIF at a rural site in Pennsylvania, J. Geophys. Res, 108, (D19), 2003.

G.D. Edwards, C. A. Cantrell, S. Stephens, B. Hill, O. Goyea, R. E. Shetter, R.L. Mauldin, E. Kosciuch, D.J. Tanner and F.L. Eisele, A Chemical Ionization Mass Spectrometer instrument for the Measurement of Tropospheric HO2 and RO2, Analytical Chemistry, 75 (20): pp. 5317-5327, 2003.

G.D. Edwards and P.S. Monks, "The Performance of a Single Monochromator Diode Array Spectroradiometer at IPMMI: An Evaluation", J. Geophys. Res., 108 (D16) ,2003.