Measurement of Cl2 in coastal urban air

Details Measurement of Cl2 in coastal urban air Measurement of Cl2 in coastal urban air

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3311809f&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 11, CiteID L11809

Physics

11

Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251), Atmospheric Composition And Structure: Troposphere: Composition And Chemistry

Scientific paper

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.

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