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UID:0-1682@hmc.edu
DTSTART;TZID=America/Los_Angeles:20251007T144500
DTEND;TZID=America/Los_Angeles:20251007T160000
DTSTAMP:20250923T185707Z
URL:https://www.hmc.edu/calendar/events/hixon-center-climate-colloquium-ch
 anging-sources-of-atmospheric-organics-impacts-from-local-to-global-scales
 -2/
SUMMARY:Hixon Center Climate Colloquium– "Changing Sources of Atmospheric
  Organics: Impacts from Local to Global Scales"
DESCRIPTION:Part of the Hixon Center's Climate and Environmental Sciences C
 olloquium (CLES199)\n\nShifting patterns of emissions have reduced the imp
 ortance of anthropogenic fuel-related volatile organic compounds (VOCs) in
  forming urban pollution\, increasing the relative significance of "novel"
  (i.e.\, previously underappreciated) sources. These novel VOC emissions i
 nclude oxygenated organics from personal care products and cooking activit
 ies\, as well as terpenoids from both anthropogenic and biogenic sources. 
 Such compounds are often poorly represented in air quality and climate mod
 els\, making it difficult to diagnose their individual effects on atmosphe
 ric outcomes of interest.\n\nKelvin Bates\, assistant professor of air qua
 lity at University of Colorado Boulder\, combines field observations\, tar
 geted laboratory experiments and atmospheric modeling to determine the che
 mistry and the impacts of these compounds. His research team uses mass spe
 ctrometric techniques to identify gas-phase tracers of individual emission
  sources in major U.S. cities. After quantifying their emissions\, they re
 plicate the chemistry of VOCs from individual sources in environmental cha
 mber experiments\, which enables them to diagnose the atmospheric fates of
  compounds from each source. They incorporate the chemistry elucidated by 
 their experiments into GEOS-Chem\, a global atmospheric chemistry model\, 
 and show that organic emissions from cooking\, personal care products and 
 urban vegetation are all major contributors to modern U.S. urban air pollu
 tion. Moreover\, these sources are sufficiently strong and widespread to c
 hange atmospheric composition at regional to global scales\, with importan
 t implications for climate-chemistry feedbacks.
ATTACH;FMTTYPE=image/jpeg:https://www.hmc.edu/calendar/wp-content/uploads/
 sites/39/2025/09/Bates.jpg
CATEGORIES:General Feed,TCCS Feed: Symposium
LOCATION:Shanahan Center\, 320 E. Foothill Blvd.\, Claremont\, CA\, 91711\,
  United States
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=320 E. Foothill Blvd.\, Cla
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