Paul Sheppard's research focuses on environmental history and change through time.
Sheppard, P.R., Ridenour, G., Witten, M.L. 2009. Multiple techniques for researching airborne particulates: a comprehensive case study of Fallon, Nevada. Pp. 141–156 in Airborne Particulates, M. Cheng, W. Liu (Eds.). Nova Science Publishers: New York.
Sheppard, P.R. 2010. Dendroclimatology: extracting climate from trees. Wiley Interdisciplinary Reviews: Climate Change 1(3):343–352.
Sheppard, P.R., Donaldson, B.A., Huckleberry, G. 2010. Assessment of a field-based course on integrative geology, ecology, and cultural history. International Research in Geographical and Environmental Education 19(4):295–313.