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Two-dimensional modelling of some CFC replacement compounds

Research output: Contribution to journalJournal article

Published

  • O Wild
  • OV Rattigan
  • RL Jones
  • JA Pyle
  • RA Cox
Journal publication date10/1996
JournalJournal of Atmospheric Chemistry
Journal number2
Volume25
Number of pages33
Pages167-199
Original languageEnglish

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.