Atmospheric fate of several hydrofluoroethanes and hydrochloroethanes: 2. UV absorption cross sections and atmospheric lifetimes
1991; American Geophysical Union; Volume: 96; Issue: D3 Linguagem: Inglês
10.1029/90jd02734
ISSN2156-2202
AutoresJohn J. Orlando, James B. Burkholder, S. A. McKeen, A. R. Ravishankara,
Tópico(s)Spectroscopy and Laser Applications
ResumoThe temperature dependent UV absorption cross‐sections of the hydrochlorofluoroethanes CF 3 CHFCl, CH 3 CF 2 Cl, and CF 3 CHCl 2 are reported. The UV absorption cross‐sections were measured over the temperature range 203 to 295 K and the wavelength range 190 to 230 nm. The hydrofluorocarbons CH 3 CF 2 H and CF 3 CH 2 F were also studied at 295 K and upper limits for their UV absorption cross‐sections over the wavelength range 190 to 230 nm were obtained. The atmospheric lifetimes of these species were calculated using a one‐dimensional atmospheric model, using the kinetic data obtained in the previous paper (Gierczak et al. 1991) and the absorption cross‐section data obtained in the present study.
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