Principal Investigator, Senior Scientist
The Reed Education Center and surrounding trailheads are back open! The Woodlawn History Center is open Fri. & Sat. with extended hours from 10am-2pm. Read Plan Your Visit for information on where to park, updated maps and hours, safety, and more.
I study the effects of sunlight, especially ultraviolet radiation, on ecosystems and the environment. I mainly work in freshwater and marine systems focusing on the responses of the smallest organisms in those systems, the plankton. A long term project has been studying the effects of increased UV-B due to Antarctic ozone depletion on the productivity of the Southern Ocean which surrounds the Antarctic continent. I also supervise the SI solar-radiation monitoring program which has been measuring UV-B radiation in Maryland since the 1970s compiling one of the longest records of spectral irradiance in the world.