Ground-based UV-Vis spectroscopy: Diurnal OClO-profiles during January 1990 above Soendre Stroemfjord, Greenland
- Max-Planck-Inst. fuer Chemie, Mainz (West Germany)
- Danish Meteorological Inst., Copenhagen (Denmark)
Considerable amounts of chlorine dioxide, OClO, were observed from 5 January through 2 February, 1990 in the stratosphere above Soendre Stroemfjord showing a highly perturbed chlorine chemistry. Photolysis and simultaneous formation of the OClO leads to a typical concentration minimum at noon. Its changes in concentration indicate the release of the OClO precursors BrO and ClO from their respective reservoir substances in the morning. Two incidences of increased OClO production occur repeatedly at 92{degree} and 89{degree} solar zenith angle (SZA). Furthermore, in the beginning of January OClO morning values exceed those found at dusk for comparable SZA whereas towards the end of the month the morning values become depressed compared to the evening. The twilight vertical column densities of OClO often reach about 1.6 {times} 10{sup 13} molec/cm{sup 2} and a comparison shows an increase from 1988 to 1990.
- OSTI ID:
- 5518102
- Journal Information:
- Geophysical Research Letters (American Geophysical Union); (United States), Vol. 18:4; ISSN 0094-8276
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHLORINE OXIDES
ECOLOGICAL CONCENTRATION
STRATOSPHERE
ATMOSPHERIC CHEMISTRY
ABSORPTION SPECTROSCOPY
ARCTIC REGIONS
DAILY VARIATIONS
DATA ANALYSIS
GREENLAND
LOSSES
OZONE LAYER
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
ULTRAVIOLET RADIATION
VISIBLE RADIATION
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
DECOMPOSITION
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
HALOGEN COMPOUNDS
LAYERS
OXIDES
OXYGEN COMPOUNDS
POLAR REGIONS
RADIATIONS
SPECTROSCOPY
VARIATIONS
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)