Near UV atmospheric absorption measurements of column abundances during Airborne Arctic Stratospheric Expedition, January-February 1989: 2. OClO observations

Journal Article · Thu Mar 01 00:00:00 EST 1990 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/GL017i004p00501· OSTI ID:5329435

Schiller, C; Wahner, A; Platt, U; Dorn, H P; Callies, J; Ehhalt, D H ^[1]

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1. 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), Vol. 17:4; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
ARCTIC REGIONS
STRATOSPHERE
CHLORINE OXIDES
ECOLOGICAL CONCENTRATION
ATMOSPHERIC CHEMISTRY
ABSORPTION SPECTROSCOPY
AIRCRAFT
ANTARCTICA
BOUNDARY CONDITIONS
BROMINE OXIDES
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
LATITUDE EFFECT
MATHEMATICAL MODELS
NEAR ULTRAVIOLET RADIATION
PHOTOCHEMICAL REACTIONS
VARIATIONS
VORTICES
ANTARCTIC REGIONS
BROMINE COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
EVALUATION
GEOGRAPHICAL VARIATIONS
HALOGEN COMPOUNDS
KINETICS
OXIDES
OXYGEN COMPOUNDS
POLAR REGIONS
RADIATIONS
REACTION KINETICS
SPECTROSCOPY
ULTRAVIOLET RADIATION
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects