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Observational evidence for chemical ozone depletion over the Arctic in winter 1991-92.

Author(s) : GATHEN P. von der, REX M., HARRIS N. R. P., LUCIC D., KNUDSEN B. M., BRAATHEN G. O., BACKER H. de, FABIAN R., FAST H., GIL M., KYRO E, MIKKELSEN I. S., RUMMUKAINEN M., STAHELIN J., VAROTSOS C.

Type of article: Article

Summary

The paper reports the results of a new approach to calculate chemical ozone destruction rates that allows to compare ozone concentrations in specific air parcels at different times, thus avoiding the need to make assumptions about ozone/tracer ratios. For the Arctic vortex of the 1991-92 winter the authors find that, at 20 km altitude, chemical ozone loss occurred only between early January and mid February and that the loss is proportional to the exposure to sunlight. The timing and magnitude are broadly consistent with existing understanding of photochemical ozone-depletion processes.

Details

  • Original title: Observational evidence for chemical ozone depletion over the Arctic in winter 1991-92.
  • Record ID : 1996-0556
  • Languages: English
  • Subject: Environment, General information
  • Source: Nature - vol. 375 - n. 6527
  • Publication date: 1995/05/11
  • Document available for consultation in the library of the IIR headquarters only.

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