Diurnal variation of the OH concentration in ambient air

Details Diurnal variation of the OH concentration in ambient air Diurnal variation of the OH concentration in ambient air

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..123s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, Feb. 1987, p. 123-126. DOE-supported research.

Physics

7

Atmospheric Composition, Concentration (Composition), Diurnal Variations, Hydroxyl Radicals, Atmospheric Chemistry, Laser Induced Fluorescence

Scientific paper

A tunable dye laser pumped by a doubled Nd-YAlG laser was used to obtain measurements of the ambient OH concentrations over a small area in Michigan in July-August 1986 by means of the fluorescence technique. The UV radiation was in line with the OH Q1(2) transition near 281.1 nm. Steps taken to account for O3 and water vapor interference are described. The trials demonstrated that it is preferable to monitor OH with a beam energy density of about 0.05 mJ/sq cm. Routine OH monitoring can then be effected with the laser in a pulsed mode.

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