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Los Angeles Summer Midday Particulate Carbon: Primary and Secondary Aerosol

Turpin, Barbara J. and Huntzicker, James J. and Larson, Susan M. and Cass, Glen R. (1991) Los Angeles Summer Midday Particulate Carbon: Primary and Secondary Aerosol. Environmental Science and Technology, 25 (10). pp. 1788-1793. ISSN 0013-936X. doi:10.1021/es00022a017.

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Aerosol sampling during photochemically active times across the Los Angeles Basin has provided evidence of secondary formation of organic aerosol from gas-phase precursors at midday. Ambient organic carbon/elemental carbon ratios exceeded the estimated ratio of organic carbon/elemental carbon in primary source emissions on most sampling days at all sites. The concentration of secondary organic aerosol was calculated by using ambient data and estimates of the organic carbon/elemental carbon ratio in primary source emissions. Nonparametric sign correlations comparing calculated secondary organic carbon concentrations with tracers of both primary and secondary aerosols supported the method used to quantify secondary organic carbon. Secondary organic aerosol appears to have contributed roughly half of the organic aerosol in Pasadena during midday summer conditions.

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Additional Information:© 1991 American Chemical Society. Received for review April 22, 1991. Accepted June 6, 1991. Support for this project was provided by the National Aeronautics and Space Administration and the California Air Resources Board, by a grant from the Hewlett Foundation, and by gifts to the Environmental Quality Laboratory at the California Institute of Technology. Field sites were located at South Coast Air Quality Management District monitoring stations. The advice and assistance of Dr. Stephen McDow is greatly appreciated.
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California Air Resources BoardUNSPECIFIED
Hewlett FoundationUNSPECIFIED
Environmental Quality LaboratoryUNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:20160629-110314055
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Official Citation:Los Angeles summer midday particulate carbon: primary and secondary aerosol Barbara J. Turpin, James J. Huntzicker, Susan M. Larson, and Glen R. Cass Environmental Science & Technology 1991 25 (10), 1788-1793 DOI: 10.1021/es00022a017
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68741
Deposited By: Ruth Sustaita
Deposited On:29 Jun 2016 20:20
Last Modified:11 Nov 2021 04:04

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