Kinetics investigations of atmospheric chemical reactions. Doctoral thesis
Two gas-phase kinetics investigations were performed using a low-pressure, fast-flow system with mass spectrometric detection. The first investigation was a study of the rates of the reactions of diatomic sulfur, S/sub 2/, with O, O/sub 2/, O/sub 3/, N/sub 2/O, NO and NO/sub 2/ at 409K and low pressure (0.89-3.0 Torr). The reaction with atomic oxygen was found to be fast. Under the experimental conditions, S/sub 2/ did not react with any of the other species, but upper limits to the reaction rate constants are reported. The second investigation was a study of the synergistic coupling of atmospheric bromine and chlorine chemistry. It is concluded that the ClO+BrO reaction could account for a large fraction of the spring-time ozone hole reported recently, provided that at least 20 ppt of total inorganic bromine is present, and it may provide a source of chlorine dioxide of sufficient magnitude to explain the recent measurements of this species in the Antarctic stratosphere.
- Research Organization:
- National Center for Atmospheric Research, Boulder, CO (USA)
- OSTI ID:
- 6028051
- Report Number(s):
- PB-87-213351/XAB; NCAR/CT-107
- Country of Publication:
- United States
- Language:
- English
Similar Records
Temperature dependence of the rate constant and product channels for the BrO + ClO reaction
Stratospheric OClO measurements as a poor quantitative indicator of chlorine activation
Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
580000 -- Geosciences
AIR POLLUTION
ANTARCTIC REGIONS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORINE
EARTH ATMOSPHERE
ELEMENTS
HALOGENS
KINETICS
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
OZONE
POLAR REGIONS
POLLUTION
REACTION KINETICS
STRATOSPHERE
SULFUR