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Detection of atmospheric OH radicals

: Platt, U.; Rateike, M.; Hofzumahaus, A.; Ehhalt, D.H.; Junkermann, W.

Free radical research communications 3 (1987), No.1-5, pp.165-172
ISSN: 8755-0199
Journal Article
Fraunhofer IFU; 2002 in Helmholtz-Gesellschaft integriert
atmosphere; laser; model calculation; OH radical; spectroscopic measurement

The detection of atmospheric OH radicals by laser long path absorption spectroscopy is described. This technique is specific to OH and easily calibrated. In various field measurements from below the detection limit 5 E5/ccm up to 8.7 E6 OH radicals/ccm have been observed. Measurements of meteorologic parameters and mixing ratios of other trace gases simultaneously with OH allow comparison of observed OH levels with reaction kinetic model calculations. (IFU)