Measurement of Cl 2  in coastal urban air | Zendy

Finley B. D. | Zendy; Saltzman E. S. | Zendy

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Measurement of Cl 2 in coastal urban air

Author(s) -

Finley B. D.,

Saltzman E. S.

Publication year - 2006

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2006gl025799

Subject(s) - noon , environmental science , air mass (solar energy) , atmospheric sciences , photodissociation , atmospheric pressure , ion , analytical chemistry (journal) , environmental chemistry , chemistry , meteorology , physics , photochemistry , boundary layer , thermodynamics , organic chemistry

Measurements of Cl 2 in coastal urban air were made in Irvine, California from Aug.‐Nov., 2005, using negative ion atmospheric pressure chemical ionization with tandem mass spectrometry. Cl 2 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 Cl 2 . Model calculations suggest that Cl 2 photochemistry results in an increase of 5–8 ppb in daily maximum O 3 levels, relative to a base case scenario without Cl 2 .

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