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Observational evidence for the role of denitrification in Arctic stratospheric ozone loss

  • R. S. Gao
  • , E. C. Richard
  • , P. J. Popp
  • , G. C. Toon
  • , D. F. Hurst
  • , P. A. Newman
  • , J. C. Holecek
  • , M. J. Northway
  • , D. W. Fahey
  • , M. Y. Danilin
  • , B. Sen
  • , K. Aikin
  • , P. A. Romashkin
  • , J. W. Elkins
  • , C. R. Webster
  • , S. M. Schauffler
  • , J. B. Greenblatt
  • , C. T. McElroy
  • , L. R. Lait
  • , T. P. Bui
  • D. Baumgardner
  • National Oceanic and Atmospheric Administration
  • University of Colorado Boulder
  • Jet Propulsion Laboratory, California Institute of Technology
  • NASA Goddard Space Flight Center
  • Verisk Atmospheric and Environmental Research
  • National Center for Atmospheric Research
  • NASA Ames Research Center
  • Université Laval and Environment and Climate Change Canada
  • Universidad Nacional Autónoma de México

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Severe and extensive denitrification, chlorine activation, and photochemical ozone loss were observed throughout the lower stratosphere in the 1999-2000 Arctic vortex. A large number of air parcels sampled between late February and mid-March, 2000, were photochemically intercomparable for chemical O3 loss rates. In these air parcels, the temporal evolution of the correlations of O3 with the NOy remaining after denitrification provides strong evidence for the role of NOy in moderating O3 destruction. In 71%-denitrified air parcels, a chemical O3 destruction rate of 63 ppbv/day was calculated, while in 43%-denitrified air parcels the destruction rate was only 43 ppbv/day. These observational results show that representative denitrification models will be required for accurate prediction of future Arctic O3 changes.

Original languageEnglish
Pages (from-to)2879-2882
Number of pages4
JournalGeophysical Research Letters
Volume28
Issue number15
DOIs
StatePublished - Aug 1 2001
Externally publishedYes

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