AFFILIATED SCIENTIST

Zepp, Richard G.
Research Scientist, U.S. Environmental Protection Agency

Research Interests:

Photodegradation processes in the environment, the effects of UV-induced photochemical processes on the biological availability of organic carbon and nitrogen in freshwater and marine environments, and biogeochemical processes affecting trace gas exchange between biosphere and atmosphere.

Selected Publications:

• Bushaw, K. L., R. G. Zepp, M. A. Tarr, D. Schulz-Jander, R. A. Bourbonniere, R. E. Hodson, W. L. Miller, D. A. Bronk, and M. A. Moran. 1996. Photochemical release of biologically available nitrogen from aquatic dissolved organic matter. Nature 381:404-407.
• Miller, W. L. and R. G. Zepp. 1995. Photochemical production of dissolved inorganic carbon from terrestrial organic matter: significance to the oceanic organic carbon cycle. Geophys. Res. Lett. 22:417-420.
• Moran, M. A. and R. G. Zepp. 1997. Role of photoreactions in the formation of biologically labile compounds from dissolved organic matter. Limnol. Oceanogr, In press.
• Zepp, R. G., T. V. Callaghan, and D. J. Erickson. 1995. Effects of increased solar ultraviolet radiation on biogeochemical cycles. Ambio 24: 181-187.