Measurement of Cl2 in coastal urban air

Measurements of Cl2 in coastal urban air were made in Irvine, California from Aug.‐Nov., 2005, using negative ion atmospheric pressure chemical ionization with tandem mass spectrometry. Cl2 ranged from <2.5 to 20 ppt with a two month mean of 3.5 ± 3.5 ppt (1σ) and an average noon photolysis rate...

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Bibliographic Details
Published inGeophysical research letters Vol. 33; no. 11; pp. L11809 - n/a
Main Authors Finley, B. D., Saltzman, E. S.
Format Journal Article
LanguageEnglish
Published Washington, DC American Geophysical Union 01.06.2006
Blackwell Publishing Ltd
Subjects
Atmospheric Composition and Structure
composition and chemistry
Constituent sources and sinks
Earth sciences
Earth, ocean, space
Exact sciences and technology
Pollution
Troposphere
urban and regional
United States
California
models
Photolysis
Ionization
photochemistry
Negative ion
air
North America
mass spectroscopy
atmospheric pressure
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Summary:Measurements of Cl2 in coastal urban air were made in Irvine, California from Aug.‐Nov., 2005, using negative ion atmospheric pressure chemical ionization with tandem mass spectrometry. Cl2 ranged from <2.5 to 20 ppt with a two month mean of 3.5 ± 3.5 ppt (1σ) and an average noon photolysis rate of 44 ppt hr−1 Cl2. Model calculations suggest that Cl2 photochemistry results in an increase of 5–8 ppb in daily maximum O3 levels, relative to a base case scenario without Cl2.
Bibliography:ArticleID:2006GL025799
istex:266978D342ED770AF493F7141FBF412112C8BC10
ark:/67375/WNG-24Z200SH-W
ISSN:0094-8276
1944-8007
DOI:10.1029/2006GL025799