Groundbased spectroscopic measurements of stratospheric NO[sub 2] and OClO in arctic winter 1989/90
The authors report on column measurements of stratospheric nitrogen dioxide and OClO made near the arctic vortex. This is part of an effort to study ozone depletion effects in the artic region by looking for atmospheric signatures of gases which contribute to catalyzing ozone depletion, denitrification, and activation of halogen species. OClO is viewed as a sensitive indicator of activated halogene chemistry, since it is produced via chlorine oxide and bromine oxide interactions. It also is rapidly photolyzed. Using direct moonlight or zenith scattered sunlight, UV and visible spectroscopy was able to measure slant column integrated NO[sub 2] and OClO abundances, and convert them to vertical column densities. Elevated levels of OClO were detected during February 6, 8, 1990, when atmospheric temperatures may have favored formation of polar stratospheric clouds.
- OSTI ID:
- 6338395
- Journal Information:
- Geophysical Research Letters (American Geophysical Union); (United States), Vol. 20:10; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NITROGEN DIOXIDE
ECOLOGICAL CONCENTRATION
OXYCHLORIDES
CLOUDS
DENITRIFICATION
POLAR REGIONS
SPECTROSCOPY
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CRYOSPHERE
HALOGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
OXYHALIDES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)