Journal
ATMOSPHERIC CHEMISTRY AND PHYSICS
Volume 11, Issue 22, Pages 11581-11590Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/acp-11-11581-2011
Keywords
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Funding
- CIRES
- NASA
- NSF [CHE 1011770]
- NSERC
- Division Of Chemistry [1011770] Funding Source: National Science Foundation
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We report the ozone absolute absorption cross section between 350-470 nm, the minimum between the Huggins and Chappuis bands, where the ozone cross section is less than 10(-22) cm(2). Ozone spectra were acquired using an incoherent broadband cavity enhanced absorption spectrometer, with three channels centered at 365, 405, and 455 nm. The accuracy of the measured cross section is 4-30 %, with the greatest uncertainty near the minimum absorption at 375-390 nm. Previous measurements vary by more than an order of magnitude in this spectral region. The measurements reported here provide much greater spectral coverage than the most recent measurements. The effect of O-3 concentration and water vapor partial pressure were investigated, however there were no observable changes in the absorption spectrum most likely due to the low optical density of the complex.
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