Biomass-burning-derived particles from a wide variety of fuels - Part 1: Properties of primary particles
Name
acp-20-1531-2020.pdf
Description
Published version
Size
8.41 MB
Format
Adobe PDF
Checksum (MD5)
0a7109d27f70ed6eb2508108cc39453b
Author(s)
Lim, Christopher Yung-Ta
Hagan, David Henry
Kroll, Jesse
Date Issued
February 2020
Journal
Atmospheric Chemistry and Physics
Publisher
Copernicus GmbH
Citation
McClure, Crystal D. et al. “Biomass-burning-derived particles from a wide variety of fuels - Part 1: Properties of primary particles.” Atmospheric Chemistry and Physics 20 (2020): 1531-1547 © 2020 The Author(s)
Version
Final published version
Abstract
Relationships between various optical, physical, and chemical properties of biomass-combustion-derived particles are characterized for particles produced in the laboratory from a wide range of fuels and burn conditions. The modified combustion efficiency (MCE), commonly used to parameterize biomass particle emissions and properties, is shown to generally have weak predictive capabilities, especially for more efficient combustion conditions. There is, however, a strong relationship between many intensive optical properties (e.g., single-scatter albedo, Ångström absorption exponent, mass absorption efficiency) and the organic aerosol-to-black carbon ([OA]/[BC]) mass ratio over a wider range than previously considered (0.3 to 105). The properties of brown carbon (BrC, i.e., light-absorbing organic carbon) also vary with [OA]/[BC]. Coating-induced enhancements (i.e., effects) contribute only a minor amount to BC absorption for all of the burns despite some burns producing particles having large ensemble-average coating-to-core mass ratios. The BC-OA mixing state varies strongly with [OA]/[BC]; the fraction of OA that is internally mixed with BC decreases with [OA]/[BC] while the relative amount of OA coated on BC increases. In contrast, there is little relationship between many OA bulk chemical properties and [OA]/[BC], with the O:C and H:C atomic ratios and the relative abundance of a key marker ion (m/z=60 linked to levoglucosan) all showing no dependence on [OA]/[BC]. In contrast, both the organic nitrate fraction of OA and the OA volatility do depend on the [OA]/[BC]. Neither the total particle nor BC-specific size distributions exhibit any clear dependence on the burn conditions or [OA]/[BC], although there is perhaps a dependence on fuel type. Overall, our results expand on existing knowledge to contribute new understanding of the properties of particles emitted from biomass combustion.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.5194/acp-20-1531-2020
