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UID:20250826T150544EDT-1200d8zCWi@132.216.98.100
DTSTAMP:20250826T190544Z
DESCRIPTION:Modeling of Secondary Organic Aerosol partitioning for the Isop
 rene system at Low and High RH\n\nThe secondary organic aerosol (SOA) prod
 uced from isoprene oxidation by ozone with and without inorganic seed is m
 odelled using an equilibrium partitioning model based on AIOMFAC and EVAPO
 RATION. The model results are compared with measurements at the CERN CLOUD
  (Cosmics Leaving OUtdoor Droplets) chamber. For the model we used experim
 ental data on SOA yields and molecular composition of first generation pro
 ducts from isoprene oxidation under conditions comparable to those of the 
 experiments. The model uses surrogate molecular species such as monomers a
 nd dimers to represent the SOA formed.  Experimental SOA mass concentratio
 n and levels of isoprene reacted were used to determine branching ratios f
 or the model predictions. The branching ratios are adjustable parameters u
 sed to estimate the percentage of semi-volatile or low volatility monomer 
 and dimer compounds formed from compounds predicted by the Master Chemical
  Mechanism. Model results for the yield and mass concentration are compare
 d with the experiments for cases with and without Ammonium sulfate seed. T
 he goal is to study the hygroscopic growth and partitioning of aerosols at
  varying RH for both seeded and non-seeded cases. To match the SOA mass yi
 eld and mass concentration calculated by the model with the experimental d
 ata for the seeded case\, the branching ratios of the monomers needed to b
 e adjusted. Results and possible reasons for the discrepancies will be dis
 cussed.\n
DTSTART:20160316T190000Z
DTEND:20160316T193000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Student Seminar: Dalrin Ampritta Amaladhasan
URL:/meteo/channels/event/student-seminar-dalrin-ampri
 tta-amaladhasan-255081
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