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UID:20260824T223533EDT-7274uCUfu9@132.216.98.100
DTSTAMP:20260825T023533Z
DESCRIPTION:Please join us as we welcome Dr. Kaley Walker\, a Professor in 
 the department of Physics at the University of Toronto seminar titled 'Usi
 ng Spectroscopy to Measure Atmospheric Composition with the Atmospheric Ch
 emistry Experiment - A two-year mission that is still going after thirteen
  years!'. Coffee will be served.\n\nAbstract\nReliable chemical compositio
 n measurements are essential for monitoring and to understand changes occu
 rring in the Earth's atmosphere due to ozone recovery\, climate change and
  pollutant emissions.\nAltitude-resolved data are a necessary part of this
  composition data set because many processes occur at specific altitudes o
 r over limited vertical length scales.  Solar occultation has proven to be
  a very effective technique for measuring profiles of atmospheric trace ga
 ses and aerosols\, capable of tracking long-term changes.M/p>\nThis presen
 tation will describe the results from the Canadian-led Atmospheric Chemist
 ry Experiment (ACE)\, a scientific satellite mission using the solar occul
 tation technique.  In orbit since 2003\, the SCISAT/ACE satellite uses inf
 rared and UV-visible spectroscopy to investigate the chemistry and dynamic
 s of the Earth's atmosphere.  The two instruments\, ACE-FTS and ACE-MAESTR
 O\, have been making regular solar occultation observations for more than 
 twelve years and\, from these measurements\, deriving altitude profiles of
  over 30 different atmospheric trace-gas species\, temperature and pressur
 e.  This presentation will discuss recent scientific and validation result
 s from ACE-FTS.\nFor information about the Atmospheric Chemistry Experimen
 t including publications\, climatological data sets and publicly available
  profiles\, please visit the ACE website: http://www.ace.uwaterloo.ca/.
DTSTART:20161107T203000Z
DTEND:20161107T213000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Seminar: Dr.  Kaley Walker
URL:https://www.mcgill.ca/meteo/channels/event/seminar-dr-kaley-walker-2637
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