Modeling the role of alkanes, polycyclic aromatic hydrocarbons, and their oligomers in secondary organic aerosol formation

Environmental Science & Technology
Havala O T Pye, George A Pouliot

Abstract

A computationally efficient method to treat secondary organic aerosol (SOA) from various length and structure alkanes as well as SOA from polycyclic aromatic hydrocarbons (PAHs) is implemented in the Community Multiscale Air Quality (CMAQ) model to predict aerosol concentrations over the United States. Oxidation of alkanes is predicted to produce more aerosol than oxidation of PAHs driven by relatively higher alkane emissions. SOA from alkanes and PAHs, although small in magnitude, can be a substantial fraction of the SOA from anthropogenic hydrocarbons, particularly in winter, and could contribute more if emission inventories lack intermediate volatility alkanes (>C(13)) or if the vehicle fleet shifts toward diesel-powered vehicles. The SOA produced from oxidation of alkanes correlates well with ozone and odd oxygen in many locations, but the lower correlation of anthropogenic oligomers with odd oxygen indicates that models may need additional photochemically dependent pathways to low-volatility SOA.

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Citations

Oct 24, 2012·Proceedings of the National Academy of Sciences of the United States of America·Drew R GentnerAllen H Goldstein
Aug 10, 2013·The Journal of Chemical Physics·A J WalshM W D Mansfield
Nov 7, 2015·Environmental Science & Technology·Havala Olson Taylor PyePaul B Shepson
Aug 1, 2016·Environmental Science and Pollution Research International·Hao LuBoqiong Jiang
Jan 1, 2016·Atmospheric Chemistry and Physics·Yuqiang ZhangJ Jason West
Jan 1, 2017·Atmospheric Chemistry and Physics·Havala O T PyeAllen H Goldstein
Jan 1, 2017·Geoscientific Model Development·K Wyat AppelJeffrey O Young
Jan 1, 2017·Atmospheric Chemistry and Physics·Benjamin N MurphyHavala O T Pye
Jul 14, 2018·Environmental Science & Technology·Annmarie G CarltonChristopher J Hennigan
Feb 21, 2018·Environmental Science & Technology·Quanfu HeYinon Rudich

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