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Hydrochloric acid: A regional perspective on concentrations and formation in the atmosphere of Southern California

Eldering, Annmarie and Solomon, Paul A. and Salmon, Lynn G. and Fall, Theresa and Cass, Glen R. (1991) Hydrochloric acid: A regional perspective on concentrations and formation in the atmosphere of Southern California. Atmospheric Environment Part A-General Topics, 25 (10). pp. 2091-2102. ISSN 0960-1686. doi:10.1016/0960-1686(91)90086-M.

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Atmospheric gaseous hydrochloric acid (HCl) concentrations and water-soluble species in the aerosol phase were measured at nine sites in Southern California throughout the year 1986. Annual average HCl concentrations measured by the denuder difference method ranged from 0.39 ppb at an offshore island to 1.25 ppb onshore at Hawthorne, California. An ion balance on the aerosol shows that coarse particle chloride begins as sea salt over the ocean and is depleted relative to aerosol sodium with transport inland. Total chloride and sodium balances show that chloride depletion from the aerosol is matched by a comparable increase in gaseous HCl concentrations, consistent with the proposition that acid gas reactions with sea salt are the principal source of gaseous HCl in the Southern California atmosphere. Fine aerosol chloride exceeds fine particle sodium on a number of occasions, particularly at one inland site known for extraordinarily high NH_3 levels. There is evidence that coarse aerosol chloride from sea salt is being processed by atmospheric reactions through HCl to form fine aerosol, possibly NH_4Cl.

Item Type:Article
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URLURL TypeDescription
Eldering, Annmarie0000-0003-1080-9922
Additional Information:© 1991 Pergamon Press. First received 1 May 1990 and in final form 16 October 1990. The data acquisition phase of this research was supported by the California Air Resources Board under agreement A4-144-32. Data interpretation was supported by a fellowship from the Switzer Foundation and by gifts to the Environmental Quality Laboratory.
Group:Environmental Quality Laboratory
Funding AgencyGrant Number
California Air Resources BoardA4-144-32
Robert and Patricia Switzer FoundationUNSPECIFIED
Environmental Quality LaboratoryUNSPECIFIED
Subject Keywords:Hydrochloric acid; aerosol chloride; nitric acid; aerosol nitrate; sodium; marine aerosol
Issue or Number:10
Record Number:CaltechAUTHORS:20160623-080754238
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Official Citation:AnnMarie Eldering, Paul A. Solomon, Lynn G. Salmon, Theresa Fall, Glen R. Cass, Hydrochloric acid: A regional perspective on concentrations and formation in the atmosphere of Southern California, Atmospheric Environment. Part A. General Topics, Volume 25, Issue 10, 1991, Pages 2091-2102, ISSN 0960-1686, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68625
Deposited On:23 Jun 2016 22:20
Last Modified:11 Nov 2021 04:02

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