The University of Denver’s Aerosol Research Group has
made aerosol measurements from aircraft platforms in the
stratosphere and the troposphere. These data have been analyzed to
study the origins, fates and impacts of the
atmospheric aerosol. As can be seen from our list of publications,
we have enjoyed extensive collaborations with colleagues measuring
related parameters and species. Specific topics include:
Instrument Design and Performance: The
function and performance of the low pressure condensation particle
counters, optical particle counters, low-turbulence inlet and passive,
near-isokinetic inlet have been described. Comparisons with lidar
and satellite measurements have been done.
Characteristics and Impacts of Volcanic Aerosol:
Number concentrations and size distributions were measured in the
stratosphere following the eruptions of El Chichon and Pinatubo.
New particle formation, optical extinction and heterogeneous chemistry
have been described.
Stratospheric Dynamics: Number
concentrations of sub-micron particles (measured with low-pressure
condensation nuclei counters) were measured to study
stratospheric-troposphere exchange and transport across the jet stream
and into the polar vortex.
Ozone Depletion: We have studied the
role of aerosol surface in the chemistry of the lower stratosphere.
Cloud-Aerosol Interactions: Tropical,
subtropical and mid-latitude cirrus clouds and their interaction with
particles have been studied. The formation of Polar Stratospheric
Clouds have been observed and related to the thermodynamic and chemical
situations. Cloud-aerosol interactions are a critical factor in
Aerosol Dynamics: The processes that sustain
the non-volcanic, stratospheric aerosol layer have been observed and
reported. The conditions leading to the formation of new particles
in the upper troposphere and lower stratosphere have been reported.
Air Quality and Long Range Transport of
Pollutants: The DU Aerosol Group has contributed to NOAA
studies of pollution in Houston and transport of pollutants.
Dust and Soot in the Atmosphere: Inlets
designed and operated by the DU Aerosol Group have facilitated the
measurement of dust and soot in the atmosphere. Both are important