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Monitoring potential photochemical interference in laser-induced fluorescence measurements of atmospheric OH

Dubey, Manvendra K. and Hanisco, Thomas F. and Wennberg, Paul O. and Anderson, James G. (1996) Monitoring potential photochemical interference in laser-induced fluorescence measurements of atmospheric OH. Geophysical Research Letters, 23 (22). pp. 3215-3218. ISSN 0094-8276. doi:10.1029/96GL03008.

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In situ laser-induced fluorescence measurements of atmospheric OH are susceptible to interference from laser generated OH, particularly in the troposphere. To quantify this interference we implement the addition of perfluoropropene, C_3F_6, for the chemical removal of OH from the ambient air. The removal rate of OH by C_3F_6 is determined in the laboratory using the discharge flow technique. Over the temperature range 249 to 296 K the rate constant is (6.0±0.8) × 10^(−13) exp[(370±40)/T] cm^³ molecule^(−1) s^(−1), independent of pressure. In situ measurements using C_3F_6 addition are performed in both aircraft-borne and ground-based experiments. These studies show that laser excitation of the ^²Σ^+(v=1)← ^²Π(v=0) transition (282 nm) at high pulse repetition rates and low peak power can provide reliable and sensitive measurements of tropospheric OH.

Item Type:Article
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Hanisco, Thomas F.0000-0001-9434-8507
Wennberg, Paul O.0000-0002-6126-3854
Additional Information:© 1996 American Geophysical Union. Manuscript Accepted: 19 Sep 1996. Manuscript Received: 17 Jul 1996. Paper number 96GL03008. We thank NASA's Upper Atmospheric Research and Atmospheric Effects of Aviation Programs for support.
Group:UNSPECIFIED, UNSPECIFIED, Division of Geological and Planetary Sciences
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Issue or Number:22
Record Number:CaltechAUTHORS:20140718-140607725
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47339
Deposited By: Ruth Sustaita
Deposited On:18 Jul 2014 21:57
Last Modified:10 Nov 2021 17:38

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