Two-dimensional modelling of some CFC replacement compounds |
| |
| Authors: | Oliver Wild Oliver V Rattigan Roderic L Jones John A Pyle R Anthony Cox |
| |
| Institution: | (1) Centre for Atmospheric Science, Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K.;(2) Present address: Earth System Science, University of California, 92697 Irvine, CA;(3) Present address: Department of Chemistry, Boston College, 02167 Boston, MA |
| |
| Abstract: | The Cambridge 2-D Eulerian model has been used to study the potential atmospheric distributions and lifetimes of a number of CFC replacement compounds and their degradation products. The study has focused on HFC 134a and HCFCs 123, 141b and 142b and the major products formed by their atmospheric degradation. The loss of these compounds and their products by hydroxyl radical attack, photolysis and in-cloud hydrolysis have been investigated. The study has shown that HCFCs 141b and 142b have sufficiently long lifetimes to enter the stratosphere in significant quantities, where degradation leads to an increase in the total stratospheric chlorine concentration. The study has also highlighted areas where further experimental work would be valuable, in particular characterisation of the product channels for the degradation reactions and determination of the removal rates of the products in the aqueous phase. |
| |
| Keywords: | CFC replacement compounds distributions tropospheric lifetimes trifluoroacetic acid |
| 本文献已被 SpringerLink 等数据库收录！ |
|
