ICAS ICAS ICAS ICAS ICAS
ICAS


University of Houston
Natural Sciences and Mathematics
Department of Earth and Atmospheric Sciences

  • EPA
  • HARC
  • NASA
  • NSF
  • TCEQ
  • EDF
 
 
Barry Lefer   Curriculum Vitae pdf
Dr. Barry Lefer
 

Associate Professor of Atmospheric Science, Atmospheric Chemistry

Post Doc, National Center for Atmospheric Research,1997-2000, Boulder, CO
Ph.D., Earth Sciences-Geochemical Systems, 1997, University of New Hampshire
M.S. Earth Sciences-Geochemical Systems, 1992, University of New Hampshire
B.A. Environmental Sciences, 1989, University of Virginia

Office: 229 Old Science
Phone: (713) 893-1741
blefer@uh.edu

  • Research Interest
  • Projects
  • Publications
  • Students
  • Courses
 

The impact of clouds, urban aerosol, and Asian dust on photolysis frequencies and ozone photochemistry.

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.

The Institute for Multi-Dimensional Air Quality Studies (IMAQS)

Content for projects
 
 
 
 
  • Trace gas emissions through a winter snowpack in the subalpine ecosystem at Niwot Ridge, Colorado, Swanson, A.L., B.L. Lefer, V. Stroud, and E. Atlas, Geophysical Research Letters, 32, L03805 (doi:10.1029/2004GL021809), 2005.
  • South Pole NOx Chemistry: an assessment of factors controlling variability and absolute levels, Davis, D., G. Chen, M. Buhr, J. Crawford, D. Lenschow, B. Lefer, R. Shetter, F. Eisele, L. Mauldin, A. Hogan, Atmospheric Environment, 38(32), 5375-5388, 2004.
  • Testing fast photochemical theory during TRACE-P based on measurements of OH, HO2, and CH2O, Olson, J.R., et al., Journal of Geophysical Research-Atmospheres, 109 (D15), 2004.
  • Photolysis frequency of O3 to O(1D): Measurements and modeling during the International Photolysis Frequency Measurement and Modeling Intercomparison (IPMMI), Hofzumahaus, A., et al., J. Geophys. Res., 109, doi:10.1029/2003JD004333, 2004.
  • Photochemistry in the arctic free troposphere: Ozone budget and its dependence on nitrogen oxides and the production rate of free radicals, Stroud, C., et al., Journal of Atmospheric Chemistry, 47 (2), 107-138, 2004.
  • An overview of ISCAT 2000, Davis, D.D., F. Eisele, G. Chen, et al.,Atmospheric Environment, 38 (32), 5363-5373, 2004.
  • A reassessment of HOx South Pole chemistry based on observations recorded during ISCAT 2000, Chen, G., D. Davis, J. Crawford, et al., Atmospheric Environment, 38 (32), 5451-5461, 2004.
  • Measurements of OH, HO2+RO2, H2SO4, and MSA at the south pole during ISCAT 2000, Mauldin, R.L., E. Kosciuch, B. Henry, et al., Atmospheric Environment, 38 (32), 5423-5437, 2004.
  • Column ozone and aerosol optical properties retrieved from direct solar irradiance measurements during SOLVE II, W.H. Swartz, J.-H. Yee, R.E. Shetter, S. R. Hall, B. L. Lefer, J.M. Livingston, P.B. Russel, E.V. Browell, and M.A. Avery. Atmos, Chem, Phys, Discuss., 4, 7403-7431, 2004
  • Measurements of the sum of HO2NO2 and CH3O2NO2 in the remote troposphere, Murphy, J.G., J.A. Thornton, P.J. Wooldridge, et al., Atmospheric Chemistry and Physics, 4, 377-384, 2004.
  • International Photolysis Frequency Measurement and Model Intercomparison (IPMMI): Spectral actinic solar flux measurements and modeling, Bais, A.F., S. Madronich, J. Crawford, et al.,Journal of Geophysical Research-Atmospheres, 108 (D16), 2003.
  • Ozone, aerosol, potential vorticity, and trace gas trends observed at high-latitudes over North America from February to May 2000, Browell, E.V., J.W. Hair, C.F. Butler, et al., Journal of Geophysical Research-Atmospheres, 108 (D4), 2003.
  • Overview and conclusions of the international photolysis frequency measurement and modeling intercomparison (IPMMI) study, Cantrell, C.A., J.G. Calvert, A. Bais, et al., Journal of Geophysical Research-Atmospheres, 108 (D16), 2003.
  • Peroxy radical behavior during the Transport and Chemical Evolution over the Pacific (TRACE-P) campaign as measured aboard the NASA P-3B aircraft, Cantrell, C.A., G.D. Edwards, S. Stephens, et al., Journal of Geophysical Research-Atmospheres, 108 (D20), 2003.
  • Steady state free radical budgets and ozone photochemistry during TOPSE, Cantrell, C.A., L. Mauldin, M. Zondlo, et al., Journal of Geophysical Research-Atmospheres, 108 (D4), 2003.
  • Regional-scale chemical transport modeling in support of the analysis of observations obtained during the TRACE-P experiment, Carmichael, G.R., Y. Tang, G. Kurata, et al., Journal of Geophysical Research-Atmospheres, 108 (D21), 2003.
  • Clouds and trace gas distributions during TRACE-P, Crawford, J., J. Olson, D. Davis, et al., Journal of Geophysical Research-Atmospheres, 108 (D21), 2003.
  • Cloud impacts on UV spectral actinic flux observed during the International Photolysis Frequency Measurement and Model Intercomparison (IPMMI), Crawford, J., R.E. Shetter, B. Lefer, et al., Journal of Geophysical Research-Atmospheres, 108 (D14), 2003.
  • An assessment of western North Pacific ozone photochemistry based on springtime observations from NASA's PEM-West B (1994) and TRACE-P (2001) field studies, Davis, D.D., G. Chen, J.H. Crawford, et al., Journal of Geophysical Research-Atmospheres, 108 (D21), 2003.
  • Stratospheric influence on the northern North American free troposphere during TOPSE: Be-7 as a stratospheric tracer, Dibb, J.E., R.W. Talbot, E. Scheuer, et al., Journal of Geophysical Research-Atmospheres, 108 (D4), 2003.
  • Summary of measurement intercomparisons during TRACE-P, Eisele, F.L., L. Mauldin, C. Cantrell, et al., Journal of Geophysical Research-Atmospheres, 108 (D20), 2003.
  • Airborne tunable diode laser measurements of formaldehyde during TRACE-P: Distributions and box model comparisons, Fried, A., J. Crawford, J. Olson, et al., Journal of Geophysical Research-Atmospheres, 108 (D20), 2003.
  • Tunable diode laser measurements of formaldehyde during the TOPSE 2000 study: Distributions, trends, and model comparisons, Fried, A., Y.H. Wang, C. Cantrell, et al., Journal of Geophysical Research-Atmospheres, 108 (D4), 2003.
  • Impact of clouds and aerosols on photolysis frequencies and photochemistry during TRACE-P: 1. Analysis using radiative transfer and photochemical box models, Lefer, B.L., R.E. Shetter, S.R. Hall, et al., Journal of Geophysical Research-Atmospheres, 108 (D21), 2003.
  • Ozone depletion events observed in the high latitude surface layer during the TOPSE aircraft program, Ridley, B.A., E.L. Atlas, D.D. Montzka, et al.Journal of Geophysical Research-Atmospheres, 108 (D4), 2003.
  • Measurement of NO2 by the photolysis conversion technique during the Transport and Chemical Evolution Over the Pacific (TRACE-P) campaign, Nakamura, K., Y. Kondo, G. Chen, et al., Journal of Geophysical Research-Atmospheres, 108 (D24), 2003.
  • Shetter, R.E., W. Junkermann, W.H. Swartz, et al., Photolysis frequency of NO2: Measurement and modeling during the International Photolysis Frequency Measurement and Modeling Intercomparison (IPMMI), Journal of Geophysical Research-Atmospheres, 108 (D16), 2003.
  • Seasonal distributions of fine aerosol sulfate in the North American Arctic basin during TOPSE, Scheuer, E., R.W. Talbot, J.E. Dibb, et al., Journal of Geophysical Research-Atmospheres, 108 (D4), 2003.
  • Photochemistry in the arctic free troposphere: NOx budget and the role of odd nitrogen reservoir recycling, Stroud, C., S. Madronich, E. Atlas, et al., Atmospheric Environment, 37 (24), 3351-3364, 2003.
  • Impacts of aerosols and clouds on photolysis frequencies and photochemistry during TRACE-P: 2. Three-dimensional study using a regional chemical transport model, Tang, Y.H., G.R. Carmichael, I. Uno, et al.,Journal of Geophysical Research-Atmospheres, 108 (D21), 2003.
  • Springtime photochemistry at northern mid and high latitudes, Wang, Y.H., B. Ridley, A. Fried, et al., Journal of Geophysical Research-Atmospheres, 108 (D4), 2003.
  • Measurements of pernitric acid at the South Pole during ISCAT 2000, Slusher, D.L., L.G. Huey, D.J. Tanner, et al., Geophysical Research Letters, 29 (21), 2002.
  • Comparison of airborne measured and calculated spectral actinic flux and derived photolysis frequencies during the PEM Tropics B mission, Shetter, R.E., L. Cinquini, B.L. Lefer, et al., Journal of Geophysical Research-Atmospheres, 108 (D2), 2002.
  • Photolysis frequency measurements at the South Pole during ISCAT-98, Lefer, B.L., S.R. Hall, L. Cinquini, and R.E. Shetter, Geophysical Research Letters, 28 (19), 3637-3640, 2001.
  • An investigation of South Pole HOx chemistry: Comparison of model results with ISCAT observations, Chen, G., D. Davis, J. Crawford, et al., Geophysical Research Letters, 28 (19), 3633-3636, 2001.
  • Evidence for photochemical production of ozone at the South Pole surface, Crawford, J.H., D.D. Davis, G. Chen, et al.,Geophysical Research Letters, 28 (19), 3641-3644, 2001.
  • Marine latitude/altitude OH distributions: Comparison of Pacific Ocean observations with models, Davis, D., G. Grodzinsky, G. Chen, et al., Journal of Geophysical Research-Atmospheres, 106 (D23), 32691-32707, 2001.
  • Unexpected high levels of NO observed at South Pole, Davis, D., J.B. Nowak, G. Chen, et al., Geophysical Research Letters, 28 (19), 3625-3628, 2001.
  • Comparison of airborne NO2 photolysis frequency measurements during PEM-Tropics B, Lefer, B.L., S.R. Hall, L. Cinquini, et al., Journal of Geophysical Research-Atmospheres, 106 (D23), 32645-32656, 2001.
  • Summertime measurements of aerosol nitrate and ammonium at a northeastern US site, Lefer, B.L., and R.W. Talbot, Journal of Geophysical Research-Atmospheres, 106 (D17), 20365-20378, 2001.
  • Measurements of OH aboard the NASA P-3 during PEM-Tropics B, Mauldin, R.L., F.L. Eisele, C.A. Cantrell, et al., Journal of Geophysical Research-Atmospheres, 106 (D23), 32657-32666, 2001.
  • Measurements of OH, H2SO4, and MSA at the South Pole during ISCAT, Mauldin, R.L., F.L. Eisele, D.J. Tanner, et al., Geophysical Research Letters, 28 (19), 3629-3632, 2001.
  • Seasonal differences in the photochemistry of the South Pacific: A comparison of observations and model results from PEM-Tropics A and B, Olson, J.R., J.H. Crawford, D.D. Davis, et al., Journal of Geophysical Research-Atmospheres, 106 (D23), 32749-32766, 2001.
  • Nitric acid and ammonia at a rural northeastern US site, Lefer, B.L., R.W. Talbot, and J.W. Munger,Journal of Geophysical Research-Atmospheres, 104 (D1), 1645-1661, 1999.
  • Measurements of sulfur dioxide during GASIE with the mist chamber technique, Talbot, R.W., E.M. Scheuer, B.L. Lefer, and W.T. Luke, Journal of Geophysical Research-Atmospheres, 102 (D13), 16273-16278, 1997.
  • Distributions of beryllium 7 and lead 210, and soluble aerosol-associated ionic species over the western Pacific: PEM West B, February-March 1994, Dibb, J.E., R.W. Talbot, B.L. Lefer, et al., Journal of Geophysical Research-Atmospheres, 102 (D23), 28287-28302, 1997.
  • Results of the gas-phase sulfur intercomparison experiment (GASIE): Overview of experimental setup, results and general conclusions, Stecher, H.A., G.W. Luther, D.L. MacTaggart, et al., Journal of Geophysical Research-Atmospheres, 102 (D13), 16219-16236, 1997.
  • Chemical characteristics of continental outflow from Asia to the troposphere over the western Pacific Ocean during February-March 1994: Results from PEM-West B, Talbot, R.W., J.E. Dibb, B.L. Lefer, et al., Journal of Geophysical Research-Atmospheres, 102 (D23), 28255-28274, 1997.
  • Large-scale distributions of tropospheric nitric, formic, and acetic acids over the western Pacific basin during wintertime, Talbot, R.W., J.E. Dibb, B.L. Lefer, et al., Journal of Geophysical Research-Atmospheres, 102 (D23), 28303-28313, 1997.
  • Chemical characteristics of continental outflow over the tropical South Atlantic Ocean from Brazil and Africa, Talbot, R.W., J.D. Bradshaw, S.T. Sandholm, et al., Journal of Geophysical Research-Atmospheres, 101 (D19), 24187-24202, 1996.
  • Chemical-Composition of the Atmospheric Aerosol in the Troposphere over the Hudson-Bay Lowlands and Quebec-Labrador Regions of Canada, Gorzelska, K., R.W. Talbot, K. Klemm, et al., Journal of Geophysical Research-Atmospheres, 99 (D1), 1763-1779, 1994.
  • Low to Middle Tropospheric Profiles and Biosphere/Troposphere Fluxes of Acidic Gases in the Summertime Canadian Taiga, Klemm, O., R.W. Talbot, D.R. Fitzgerald, et al., Journal of Geophysical Research-Atmospheres, 99 (D1), 1687-1698, 1994.
  • Enhancement of Acidic Gases in Biomass Burning Impacted Air Masses over Canada, Lefer, B.L., R.W. Talbot, R.C. Harriss, et al., Journal of Geophysical Research-Atmospheres, 99 (D1), 1721-1737, 1994.
  • Summertime Partitioning and Budget of Noy Compounds in the Troposphere over Alaska and Canada - Able 3b, Sandholm, S., J. Olson, J. Bradshaw, et al., Journal of Geophysical Research-Atmospheres, 99 (D1), 1837-1861, 1994.
  • Summertime Distribution and Relations of Reactive Odd Nitrogen Species and Noy in the Troposphere over Canada, Talbot, R.W., J.D. Bradshaw, S.T. Sandholm, et al., Journal of Geophysical Research-Atmospheres, 99 (D1), 1863-1885, 1994.
Pictures of students