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Extraordinary isotopic fractionation in ozone photolysis

Miller, Charles E. and Onorato, Robert M. and Liang, Mao-Chang and Yung, Yuk L. (2005) Extraordinary isotopic fractionation in ozone photolysis. Geophysical Research Letters, 32 (14). Art. No. L14814. ISSN 0094-8276. doi:10.1029/2005GL023160.

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Analysis of experimental ozone absorption spectra reveals that ultraviolet photolysis within the structured Huggins band yields extraordinary wavelength-dependent isotopic fractionation, oscillating between complete enrichment and complete depletion for changes of less than 2 nm in the excitation wavelength. Visible photolysis yields wavelength-dependent fractionation that varies from −300‰ to +300‰. Photochemical modeling demonstrates photolysis contributes fractionation up to +45‰ to the heavy ozone anomaly in the middle stratosphere with measurable ^(17)O and ^(18)O isotopologue-dependent variations as a function of altitude despite the fact that the extraordinary photolysis-induced isotopic fractionation effect is dampened in the atmosphere due to the integration over all excitation wavelengths.

Item Type:Article
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URLURL TypeDescription
Miller, Charles E.0000-0002-9380-4838
Liang, Mao-Chang0000-0002-5294-9344
Yung, Yuk L.0000-0002-4263-2562
Additional Information:© 2005 The American Geophysical Union. Received 6 April 2005; Revised 15 May 2005; Accepted 16 June 2005; Published 23 July 2005. The authors thank Drs. J. Brion and S. M. Anderson for sharing their ozone absorption spectra. The research at the Jet Propulsion Laboratory (JPL), California Institute of Technology was performed under contract with the National Aeronautics and Space Administration.
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Issue or Number:14
Record Number:CaltechAUTHORS:20140821-125830617
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Official Citation:Miller, C. E., Onorato, R. M., Liang, M.-C., & Yung, Y. L. (2005). Extraordinary isotopic fractionation in ozone photolysis. Geophysical Research Letters, 32(14), L14814. doi: 10.1029/2005gl023160
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48777
Deposited On:21 Aug 2014 21:33
Last Modified:10 Nov 2021 18:35

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