Tropospheric Halogen Chemistry: Sources, Cycling, and Impacts

William R. Simpson, Steven S. Brown, Alfonso Saiz-Lopez, Joel A. Thornton, Roland von Glasow

Research output: Contribution to journalLiterature reviewpeer-review

208 Citations (Scopus)

Abstract

In the past 40 years, atmospheric chemists have come to realize that halogens exert a powerful influence on the chemical composition of the troposphere and through that influence affect the fate of pollutants and may affect climate. Of particular note for climate is that halogen cycles affect methane, ozone, and particles, all of which are powerful climate forcing agents through direct and indirect radiative effects. This influencecomes from the high reactivity of atomic halogen radicals (e.g.,Cl, Br, I) and halogen oxides (e.g., ClO, BrO, IO, and higher oxides), known as reactive halogen species in this review. These reactive halogens are potent oxidizers for organic and inorganic compounds throughout the troposphere.
Original languageEnglish
Pages (from-to)4035-4062
Number of pages28
JournalChemical Reviews
Volume115
Issue number10
Early online date12 Mar 2015
DOIs
Publication statusPublished - May 2015

Keywords

  • MARINE BOUNDARY-LAYER
  • OZONE DEPLETION EVENTS
  • TROPICAL ATLANTIC-OCEAN
  • IN-SITU MEASUREMENTS
  • SEA-SALT AEROSOL
  • CHLORINE EMISSIONS INVENTORY
  • GROUND-BASED MEASUREMENTS
  • AIR-SNOWPACK EXCHANGE
  • 1-D MODEL PHANTAS
  • IODINE MONOXIDE

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