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Basinwide nitric acid and related species concentrations observed during the Claremont nitrogen species comparison study

Solomon, Paul A. and Larson, Susan M. and Fall, Theresa and Cass, Glen R. (1988) Basinwide nitric acid and related species concentrations observed during the Claremont nitrogen species comparison study. Atmospheric Environment, 22 (8). pp. 1587-1594. ISSN 1352-2310 . http://resolver.caltech.edu/CaltechAUTHORS:20140630-082210970

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Abstract

In conjunction with the Claremont Nitrogen Species Comparison Study, tandem filter units designed to collect HNO_3/total aerosol (TA) NO_3− and NH_3/TA NH+_4 were operated at seven locations throughout the Los Angeles area, including Claremont. The sampling methods used were related to the comparison study via intensive short-term and long-term measurements made at Claremont by both the tandem filter method and the denuder difference method. Between methods, 4-h and 6-h duration HNO_3 samples taken by the tandem filter method were higher (~ 20%) than the HNO_3 results obtained by the denuder difference method. As sampling duration increased to 22 h, the tandem filter method HNO_3 and NH_3 concentration measurements increased, while the 22-h denuder difference method HNO_3 values remained indistinguishable from the average of simultaneous short-term 4- and 6-h average samples. Analysis of the basinwide data showed that Claremont experienced the highest measured HNO_3 concentrations in the Los Angeles area during the period of the comparison study, confirming that Claremont was a wise choice for the main site of the study. In contrast, an alternative site near Riverside experienced the lowest HNO_3 levels in the air basin, accompanied by high aerosol nitrate and very high NH_3 concentrations.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0004-6981(88)90386-1 DOIArticle
http://www.sciencedirect.com/science/article/pii/0004698188903861PublisherArticle
Additional Information:© 1988 Pergamon Press plc. First received 24 November 1986 and in final form 11 August 1987. This work was supported by the California Air Resources Board under Agreement A4-144-32. Thanks are due to the South Coast Air Quality Management District for allowing the use of their air monitoring sites.
Group:Environmental Quality Laboratory
Funders:
Funding AgencyGrant Number
California Air Resources BoardA4-144-32
Subject Keywords:Nitric acid (HNO3), ammonia (NH3), tandem filter method, denuder difference method, Los Angeles
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Environmental Quality LaboratoryA-221
Record Number:CaltechAUTHORS:20140630-082210970
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140630-082210970
Official Citation:Paul A Solomon, Susan M Larson, Theresa Fall, Glen R Cass, Basinwide nitric acid and related species concentrations observed during the Claremont nitrogen species comparison study, Atmospheric Environment (1967), Volume 22, Issue 8, 1988, Pages 1587-1594, ISSN 0004-6981, http://dx.doi.org/10.1016/0004-6981(88)90386-1. (http://www.sciencedirect.com/science/article/pii/0004698188903861)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46564
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Jul 2014 19:19
Last Modified:01 Jul 2014 19:19

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