Job Title

Project Scientist I

NCAR (National Center for Atmospheric Research)

ACD (Atmospheric Chemistry Division)

ARIM (Atmospheric Radiation Investigation and Measurements)

Contact Information

email: lefer@ucar.edu

address: 1850 Table Mesa Dr, Boulder, CO 80305

phone: 303-497-1641

fax: 303-497-1411

office: ML 019E

lab: 063, 070

Education

B.A., Environmental Sciences, University of Virginia (1989)

M.S., Earth Sciences, University of New Hampshire (1992)

Ph.D., Earth Sciences, University of New Hampshire (1997)

Research, Activities and Interests

The impact of clouds, urban aerosol and Asian dust plumes on insitu photolysis frequencies.

Photochemical reactions occurring within a snow-pack and the measurement and modeling of solar UV actinic radiation in a snow-pack environment.

The atmosphere-biosphere exchange of nitric acid (HNO3) and ammonia (NH3) to forest ecosystems.

Recent publications

Lefer, B. L., S. R. Hall, L. Cinquini, and R. E. Shetter, Photolysis frequency measurements at the South Pole during ISCAT-98, Geophysical Research Letters, 28, 3637-3640

Lefer, B., S. R. Hall, L. Cinquini, J. D. Barrick, J. H. Crawford, and R. E. Shetter, A comparison of spectroradiometer and filter radiometer NO2 photlysis frequency measurements during PEM-Tropics B, 2001, in press

Mauldin, R. L., III; Eisele, F. L.; Tanner, D. J.; Kosciuch, E.; Shetter, R.; Lefer, B.; Hall, S. R.; Nowak, J. B.; Buhr, M.; Chen, G.; Wang, P.; Davis, D. , Measurements of OH, H2SO4, and MSA at the South Pole during ISCAT, Geophys. Res. Lett. Vol. 28, No. 19, p. 3629

Lefer, B. L. and R. Talbot, .W., Aerosol nitrate and ammonium at a northeastern U.S. site, Journal of Geophysical Research, 106, 20,365-20,378

Lefer, B. L., R. W. Talbot, and J. W. Munger, Nitric acid and ammonia at a rural northeastern U.S. site, Journal of Geophysical Research, 104, 1645-1661, 1999