Gasoline emissions dominate over diesel in formation of secondary organic aerosol mass

Bahreini, R.; Middlebrook, A.M.; de Gouw, J.A.; Warneke, C.; Trainer, M.; Brock, C.A.; Stark, H.; Brown, S.S.; Dube, W.P.; Gilman, J.B.; Hall, K.; Holloway, J.S.; Kuster, W.C.; Perring, A.E.; Prevot, A.S.H.; Schwarz, J.P.; Spackman, J.R.; Szidat, S.; Wagner, N.L.; Weber, R.J.; ... (2012). Gasoline emissions dominate over diesel in formation of secondary organic aerosol mass. Geophysical Research Letters, 39(6), n/a-n/a. Washington, D.C.: American Geophysical Union 10.1029/2011GL050718

[img]
Preview
Text
grl28949.pdf - Published Version
Available under License Publisher holds Copyright.

Download (2MB) | Preview

Although laboratory experiments have shown that organic compounds in both gasoline fuel and diesel engine exhaust can form secondary organic aerosol (SOA), the fractional contribution from gasoline and diesel exhaust emissions to ambient SOA in urban environments is poorly known. Here we use airborne and ground-based measurements of organic aerosol (OA) in the Los Angeles (LA) Basin, California made during May and June 2010 to assess the amount of SOA formed from diesel emissions. Diesel emissions in the LA Basin vary between weekdays and weekends, with 54% lower diesel emissions on weekends. Despite this difference in source contributions, in air masses with similar degrees of photochemical processing, formation of OA is the same on weekends and weekdays, within the measurement uncertainties. This result indicates that the contribution from diesel emissions to SOA formation is zero within our uncertainties. Therefore, substantial reductions of SOA mass on local to global scales will be achieved by reducing gasoline vehicle emissions.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Szidat, Sönke

Subjects:

500 Science > 540 Chemistry

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:38

Last Modified:

28 Nov 2020 02:21

Publisher DOI:

10.1029/2011GL050718

Web of Science ID:

000301936500003

BORIS DOI:

10.7892/boris.15410

URI:

https://boris.unibe.ch/id/eprint/15410 (FactScience: 222751)

Actions (login required)

Edit item Edit item
Provide Feedback