Airborne measurements of organic bromine compounds in the Pacific tropical tropopause layer

Maria A. Navarro, Elliot L. Atlas, Alfonso Saiz-Lopez, Xavier Rodriguez-Lloveras, Douglas E. Kinnison, Jean Francois Lamarque, Simone Tilmes, Michal Filus, Neil R.P. Harris, Elena Meneguz, Matthew J. Ashfold, Alistair J. Manning, Carlos A. Cuevas, Sue M. Schauffler, Valeria Donets

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Very short-lived brominated substances (VSLBr) are an important source of stratospheric bromine, an effective ozone destruction catalyst. However, the accurate estimation of the organic and inorganic partitioning of bromine and the input to the stratosphere remains uncertain. Here, we report near-Tropopause measurements of organic brominated substances found over the tropical Pacific during the NASA Airborne Tropical Tropopause Experiment campaigns. We combine aircraft observations and a chemistry?climate model to quantify the total bromine loading injected to the stratosphere. Surprisingly, despite differences in vertical transport between the Eastern and Western Pacific, VSLBr (organic + inorganic) contribute approximately similar amounts of bromine [∼6 (4-9) parts per thousand] to the stratospheric input at the tropical tropopause. These levels of bromine cause substantial ozone depletion in the lower stratosphere, and any increases in future abundances (e.g., as a result of aquaculture) will lead to larger depletions.

Original languageEnglish (US)
Pages (from-to)13789-13793
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume112
Issue number45
DOIs
StatePublished - Nov 10 2015

ASJC Scopus subject areas

  • General

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