The measurement of OH and HO{sub 2} in the atmosphere
Journal Article
·
· Journal of the Atmospheric Sciences
- SRI International, Menlo Park, CA (United States)
Measurements of the OH and HO{sub 2} radicals form stringent tests of our knowledge of atmospheric photochemistry. Owing to the extremely low concentrations of these species, their determination has posed a considerable experimental challenge; but now, after many years of development, it appears that reliable measurements are possible. The major experimental methods for OH are laser absorption, laser-induced fluorescence, and chemical conversion. HO{sub 2} is determined through electron spin resonance, chemical conversion to OH, or chemical amplification producing NO{sub 2}. Recent field determinations of both compounds have provided some significant surprises, suggesting that present understanding of atmospheric photochemistry is not yet complete. This overview article discusses features of these methods, needs for OH and HO{sub 2} measurement campaigns including instrument intercomparisons, and some questions posed by field measurements. 52 refs., 7 figs.
- OSTI ID:
- 220218
- Journal Information:
- Journal of the Atmospheric Sciences, Journal Name: Journal of the Atmospheric Sciences Journal Issue: 19 Vol. 52; ISSN 0022-4928; ISSN JAHSAK
- Country of Publication:
- United States
- Language:
- English
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