University of Houston

Lefer Group


  • Dr. Barry Lefer
  • Dr. Bernhard Rappenglueck
  • Dr. Gary Morris (Adjunct Professor from Valparaiso University)
  • James Flynn
  • Christine Haman
  • Marc Taylor
  • Nicole Grossberg
  • Richard Fuller
  • Denet Pernia
  • Matt Haworth
  • Barbara Schmeitz
  • Darrell Anderson
  • Julia Golovko
  • Leonardo Pedemonte
  • Sergio Alvarez
  • Luis Ackermann
  • Cari-Sue Wilmot


Balloon Facility

  • Celiometer - Uses backscatter technique to resolve boundary layer height and characteristics.
  • Tethersonde System - Returns temperature, relative humidity, mixing ratio, wind speed and direction, with a maximum launch level of 500 feet.
  • Radiosonde System - Returns same variables as tethersonde, but is attached to a weather balloon, typically reaching an altitude of 25km.
  • Ozonesonde System - Similar to radiosonde, but measures ozone in addition to meteorological variables. Typically reaches altitude of 30km.


Moody Tower

  • SO2 - Thermo 43c pulsed flourescence
  • CO - gas filter correlation
  • O3 - UV photometry
  • Brewer - spectrophotometer measuring total column O3
  • Cimel Sun Photometer -Aerosol optical depths
  • USPA - UVB site - UV and Visible MFR-SR and Broadband UV-B and PAR
  • Scanning Actinic Flux Spectroradiometer - actinic flux at luminescence res to calculate photolysis rates 280- 420nm
  • Diode Array Actinic Flux spectroradiometer - actinic flux at luminescence res to calculate photolysis rates ~2.5nkm
  • Sky Camera - whole sky images ever 60s
  • Apogee Pyronometer - measure shortwave radiation reaching the Earth's surface

moody roof met tower brewer cimel


  • The contribution of direct emissions of radical precursors HCHO and HONO from flares, stacks, and other point and mobile sources.
  • The importance of the secondary formation of HCHO from the ozonolysis of olefins.
  • The identification of formation pathways of HONO (Night/Day, surface, heterogeneous, homogeneous).
  • Impact of soot (fresh and coated) on chemistry, radiation (photochemistry/climate), and dynamics.
  • The ambient levels of ClNO2 in Houston and potential as a radical source.
  • The relative importance of “missing” radical sources.
  • Springtime ozone formation mechanisms in Houston.

Reducing uncertainties in these fields will improve our ability to model radicals and ozone formation, and thus help to assess the effectiveness of control strategies.

uh/home.txt · Last modified: 2009/04/11 14:44 by clhaman
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