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1989 (1)
1Author    C. M. Stevens, A. F. WagnerRequires cookie*
 Abstract    Dedicated to Professor Jacob Bigeleisen on the occasion of his 70th birthday Kinetic isotopic fractionation plays an important role in the quantitative analysis by isotopic studies of the cycles of the two atmospheric trace gases, CO and CH4, which are important because of their impact on the environment. These gases are scavenged from the atmosphere mainly by homogeneous gas phase oxidation reactions with OH radicals. The isotopic composition of these gases provides constraints on the relative distribution of the fluxes from sources, natural or anthro­ pogenic, of different isotopic compositions. The relationship between the composition of the gas in the atmosphere and the average value of the sources is determined by the fractionation effect of the scavenging processes, in particular the reaction with OH. Thus, knowledge of the fractionation effect is essential to determining the relative distribution of the fluxes from isotopically different sources. The reactions CO + OH and CH4 + OH exhibit several types of KIE's including normal, inverse, and compound effects resulting from the bimodal character of the former. A brief discussion of the measured values of the KIE for these reactions and their application to interpretation of the atmospheric cycles of CO and CH4 is presented. 
  Reference    Z. Naturforsch. 44a, 376 (1989); received February 3 1989 
  Published    1989 
  Keywords    Kinetic isotopic fractionation, CO + OH, CH4 + OH, Atmospheric carbon monoxide, Atmospheric methane 
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 TEI-XML for    default:Reihe_A/44/ZNA-1989-44a-0376.pdf 
 Identifier    ZNA-1989-44a-0376 
 Volume    44