Rethinking reactive halogen budgets in the midlatitude lower stratosphere

Victor L. Dvortsov, Marvin A. Geller, Susan Solomon, Sue M. Schauffler, Elliot L. Atlas, Donald R. Blake

Research output: Contribution to journalArticlepeer-review

97 Scopus citations


Current stratospheric models have difficulties in fully explaining the observed midlatitude ozone depletion in the lowermost stratosphere, particularly near the tropopause. Such models assume that only long-lived source gases provide significant contributions to the stratospheric halogen budget, while all the short-lived compounds are removed in the troposphere, the products being rained out. Here we show this assumption to be flawed. Using bromine species as an example, we show that in the lowermost stratosphere, where the observed midlatitude ozone trend maximizes, bromoform (CHBr3) alone likely contributes more inorganic bromine than all the conventional long-lived sources (halons and methyl bromide) combined.

Original languageEnglish (US)
Pages (from-to)1699-1702
Number of pages4
JournalGeophysical Research Letters
Issue number12
StatePublished - Jun 15 1999
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)


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