Letter | Published:

Reactions of OH radicals with gaseous sulphur compounds

Nature volume 284, pages 330331 (27 March 1980) | Download Citation

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Abstract

Several recent papers1–3 have discussed the origin of the sulphate aerosol in the stratosphere in terms of atmospheric carbonyl sulphide (OCS) and carbon disulphide (CS2). There is, however, considerable uncertainty in the life cycles and budgets of these compounds. This arises from a lack of knowledge of the various possible sources and also from the differences in the reported rate constants for the reactions of OCS and CS2 with hydroxyl (OH) radicals4,5, which provide a potentially large sink for these molecules in the troposphere. We report here measurements of rate constants and product formation for OH reaction with several sulphur compounds, including OCS and CS2. The results support the suggestion that oxidation of CS2 is a significant source of atmospheric OCS, but do not give conclusive evidence for a large sink for OCS in the troposphere.

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Author information

Affiliations

  1. Environmental and Medical Sciences Division, AERE, Harwell, Oxfordshire OX11 0RA, UK

    • R. A. Cox
  2. Department of Chemistry, University of Birmingham, Birmingham B15 2TT, UK

    • D. Sheppard

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DOI

https://doi.org/10.1038/284330a0

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