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UID:69dad4bd6ba6e
DTSTAMP:20260411T190949
DTSTART:20180209T110000
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DTEND:20180209T110000
URL:https://murmitoyen.com/events/vanille/udem/detail/799058-seminaire-etud
 iant-avec-m-jacob-sommers-groupe-hayes
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:Séminaire étudiant avec M. Jacob Sommers (Groupe Hayes)
DESCRIPTION:Titre : Modeling the Atmospheric Chemistry of Pollution Emitted
  from Alberta Oil Sands
\nEndroit : Pavillon Roger-Gaudry\, salle G-415 
 à 11 h 00.
\nCette conférence sera prononcée par Monsieur Jacob Sommer
 s\, étudiant au doctorat du laboratoire de Patrick Hayes\, professeur au
  Département de chimie de l'Université de Montréal.
\nRÉSUMÉ: Organic
  aerosols (OA) are a major component of regional and global pollution. Alo
 ng with other particulate matter (PM)\, OA has a complex effect on climate
  and health\, at all geographic scales. Global and regional air quality mo
 dels underestimate the formation of OA\, largely due to poorly constrained
  parameterizations for secondary OA (SOA)\, which is formed by oxidation o
 f gaseous species in the atmosphere. In this work\, a customized box model
  is developed to evaluate commonly used SOA formation parameters. While mo
 st box model evaluations are compared to urban regions\, the Athabasca Oil
  Sands (OS) are a unique source of SOA which provide a rare opportunity to
  evaluated models against a large and isolated source of SOA.
\nThis work 
 compares two methods for improving predictions of SOA that are typically b
 iased low in traditional SOA models. The first approach incorporates multi
 -generational oxidation to increase SOA mass. The second approach adjusts 
 calculated SOA yields to correct for precursor losses to experimental cham
 ber walls. This work also compares two previously proposed volatility dist
 ributions which may describe intermediate and semi-volatile precursor emis
 sions from bitumen with the goal of assigning emission sources. Each case 
 is evaluated by comparing to measurements of OA concentration and the oxyg
 en-to-carbon ratios (O:C). Finally\, by using O:C ratios of individual OA 
 components\, the model is further elaborated to allow two phases represent
 ing non-polar OA and polar OA.
\n
\nInformations supplémentaires Lab. Hay
 es
\n
\n
\nAnnonce PDF du séminaire
\n
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