Abstract
The temperature-dependent ultraviolet absorption cross-sections of CF3-CHFCI (HCFC-124) have been measured between 170 and 230 nm for temperatures ranging from 295 to 210 K, with uncertainties between 2 and 4%. These results are compared with other available sets of determinations. Temperature effects are discussed and the photodissociation coefficients, presented with their temperature dependence, are calculated. Implication of the temperature dependences on the stratospheric chemistry is also discussed. Parametrical formulae are proposed to compute absorption crosssection values for wavelengths and temperatures useful in modelling calculations.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Allied-Signal Corporation, 1989, in WMO Report 20: Scientific Assessment of Stratospheric Ozone: 1989, Volume II, Appendix: AFEAS Report.
Chou, C. C., Smith, W. S., Vera Ruiz, H., Moe, K., Crecentini, G., Molina, M. J., and Rowland, F. S., 1977, The temperature dependences of the ultraviolet absorption cross-sections of CCl2F2 and CCl3F, and their stratospheric significance, J. Phys. Chem. 81, 286–290.
Gillotay, D., Jenouvrier, A., Coquart, B., Merienne, M. F., and Simon, P. C., 1989, Ultraviolet absorption cross-section of bromoform in the temperature range 295–240 K, Planet. Space Sci. 37, 1127–1140.
Gillotay, D., and Simon, P. C., 1991, Temperature-dependence of ultraviolet absorption cross-section of alternative chlorofluoroethanes, J. Atmos. Chem. 12, 269–285.
Hubrich, G., and Stuhl, F., 1980, The ultraviolet absorption of some halogenated methanes and ethanes of atmospheric interest, J. Photochem. 12, 93–107.
Kockarts, G., 1976, Absorption and Photodissociation in the Schumann-Runge bands of molecular oxygen in the terrestrial atmosphere, Planet. Space Sci. 24, 589–604.
Molina, M. J., and Molina, L. T., 1989, in WMO Report 20: Scientific Assessment of Stratospheric Ozone: 1989, Volume II, Appendix: AFEAS Report.
Montreal Protocol on Substances that Deplete the Ozone Layer, Final Act, 1987, United Nations Environment Programme.
NASA, 1976, U.S. Standard Atmosphere Supplements, 1976, U.S. Government Printing Office, Washington, D.C.
Nicolet, M., 1984, On the molecular scattering in the terrestrial atmosphere: an empirical formula for calculation in the homosphere, Planet. Space Sci. 32, 1467–1468.
Orlando, J. J., Burkholder, J. B., McKeen, S. A., and Ravishankara, A. R., 1991, The atmospheric fate of several hydrochloro-fluoroethanes 2. Temperature dependence of UV absorption cross sections, J. Geophys. Res. 96, 5013–5023.
Simon, P. C., Gillotay, D., Vanlaethem-Meuree, N. and Wisemberg, J., 1988a, Ultraviolet absorption cross-sections of chloro-and chlorofluoro-methanes at stratospheric temperatures, J. Atmos. Chem. 7, 107–135.
Simon, P. C., Gillotay, D., Vanlaethem-Meuree, N., and Wisemberg, J., 1988b, Temperature dependence of Ultraviolet absorption cross-sections of chlorofluoroethanes, Ann. Geophys. 6, 239–248.
WMO, 1986, Atmospheric ozone 1985, WMO global ozone research and monitoring project, Report 16, vol. I, 355–367.
WMO, 1990, Scientific Assessment of Stratospheric Ozone: 1989, Report 20, Volume II, Appendix: AFEAS Report.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gillotay, D., Simon, B.C. Temperature-dependence of ultraviolet absorption cross-sections of alternative chlorofluoroethanes: 2. The 2-chloro-1,1,1,2-tetrafluoro ethane -HCFC-124. J Atmos Chem 13, 289–299 (1991). https://doi.org/10.1007/BF00058136
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00058136