The entire university community is invited to the following seminar:
Title: New techniques for the recovery of optical constants from individual levitated particles.
Speaker: Dr. Antonio Valenzuela, Researcher at the University of Granada.
Location: Conference Room of the Andalusian Institute for Earth System Research (IISTA)
Day and time: Friday, June 14, 2019, at 13:00.
Abstract:
Aerosols constitute one of the main agents of climate change. According to the Fifth Assessment Report (AR5) of the latest Intergovernmental Panel on Climate Change (IPCC).
Panel on Climate Change (IPCC) of 2013, atmospheric aerosols produce a net cooling effect on the Earth’s climate. However, a precise estimate of this
cooling is extremely difficult due to the large uncertainty in the estimation of aerosol radiative forcing (RF), where the largest uncertainty in RF is due to uncertainties in the
in the RF is due to uncertainties in the understanding of aerosol properties. To reduce these uncertainties, it is necessary to improve the methods for laboratory determination of
the optical properties of aerosol particles and their change with ambient relative humidity. Cavity ring spectroscopy (CRDS) has been shown to be a sensitive tool
to measure with high accuracy the absolute extinction cross sections of individual aerosol particles by combining optical confinement and levitation of a pair of aerosol particles.