Estimated future atmospheric concentrations of CCl/sub 3/F (fluorocarbon-11) for various hypothetical tropospheric removal rates
The variation in CCl/sub 3/F tropospheric concentrations vs. time has been calculated with different assumptions for the rates of its removal by hypothetical tropospheric removal processes. A comparison has been made of the actual total atmospheric release from anthropogenic sources to that date. The observed CCl/sub 3/F exceeds by about 20 percent the amount calculated to be present with stratospheric photolysis as the only removal process. Consequently, an increase of 10 to 20 percent in the estimated manufacture of CCl/sub 3/F through 1975 is needed to obtain agreement with the observed concentrations on the assumption that tropospheric removal processes are negligible. If the estimates of manufacture are stretched to the upper limit and of observed atmospheric concentration to the lower limit (total change of 30 percent), agreement could be reached on the assumption of about equal losses to stratospheric and tropospheric sinks. Faster tropospheric removal rates for CCl/sub 3/F are incompatible with the observed atmospheric concentrations.
- Research Organization:
- Univ. of California, Irvine
- OSTI ID:
- 7342805
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 80:19; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400500 -- Photochemistry
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
CHEMICAL REACTIONS
CHEMISTRY
CHLORINATED ALICYCLIC HYDROCARBONS
DECOMPOSITION
EARTH ATMOSPHERE
ENVIRONMENTAL EFFECTS
FLUORINATED ALICYCLIC HYDROCARBONS
FORECASTING
HALOGENATED ALICYCLIC HYDROCARBONS
MONITORING
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OZONE
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
PHOTOLYSIS
POLLUTION
PRODUCTION
REMOVAL
STRATOSPHERE
TROPOSPHERE