BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Measured Optical Properties of Aerosols - Dr Dan Peters\, Atmosphe
 ric\, Oceanic and Planetary Physics\, University of Oxford
DTSTART:20081117T141500Z
DTEND:20081117T151500Z
UID:TALK13192@talks.cam.ac.uk
CONTACT:Paul Young
DESCRIPTION:High quality aerosol optical properties are essential if satel
 lite measurements are to be used to quantify the atmospheric effects of ae
 rosols. The optical properties can be directly used to quantify the radiat
 ive effects of the aerosols on the atmosphere. The latest results from a s
 et of laboratory measurements of the optical properties of Saharan dust an
 d volcanic ash aerosols representative of those found in the atmosphere ar
 e shown. A novel method of aerosol dispersion at low gas flow rates is use
 d to\nmechanically generate the dry solid aerosol. The extinction cross se
 ction spectra has been determined by IR Fourier transform spectrometry. Th
 e size distributions of the aerosol are measured directly by two instrumen
 ts\; a sequential mobility particle sizer and counter and an aerodynamic p
 article sizer.  Conversion of the extinction cross spectra to refractive i
 ndex is then accomplished by an novel inversion technique using Mie theory
 .
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
END:VEVENT
END:VCALENDAR