Near UV atmospheric absorption measurements of column abundances during Airborne Arctic Stratospheric Expedition, January-February 1989: 2. OClO observations
- Kernforschungsanlage Juelich (West Germany)
Column abundances of OClO were measured during the Airborne Arctic Stratospheric Expedition from January 6 to February 9, 1989 by near UV absorption spectroscopy. OClO was detected during AASE inside the vortex and at the edge of the vortex with column abundances of 3-10 {times} 10{sup 12} cm{sup {minus}2} under twilight conditions and up to 1 {times} 10{sup 14} cm{sup {minus}2} during the night. For comparison, in the Antarctic winter nighttime column abundances of OClO ranged from 1-2.5 {times} 10{sup 14} cm{sup {minus}2}, while those at mid-latitudes were below the detection limit, i.e. by at least a factor of 10 lower (Solomon et al., 1988). The measurements are broadly consistent with observed BrO column abundances and chemical model calculations.
- OSTI ID:
- 5329435
- Journal Information:
- Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 17:4; ISSN 0094-8276; ISSN GPRLA
- Country of Publication:
- United States
- Language:
- English
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Near UV atmospheric absorption measurements of column abundances during Airborne Arctic Stratospheric Expedition, January-February 1989: 1. Technique and NO sub 2 observations
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54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTROSCOPY
AIRCRAFT
ANTARCTIC REGIONS
ANTARCTICA
ARCTIC REGIONS
ATMOSPHERIC CHEMISTRY
BOUNDARY CONDITIONS
BROMINE COMPOUNDS
BROMINE OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
CHLORINE OXIDES
COMPARATIVE EVALUATIONS
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
ELECTROMAGNETIC RADIATION
EVALUATION
GEOGRAPHICAL VARIATIONS
HALOGEN COMPOUNDS
KINETICS
LATITUDE EFFECT
MATHEMATICAL MODELS
NEAR ULTRAVIOLET RADIATION
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
POLAR REGIONS
RADIATIONS
REACTION KINETICS
SPECTROSCOPY
STRATOSPHERE
ULTRAVIOLET RADIATION
VARIATIONS
VORTICES