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Title: Impact of biogenic very short-lived bromine on the Antarctic ozone hole during the 21st century

Abstract

Active bromine released from the photochemical decomposition of biogenic very short-lived bromocarbons (VSLBr) enhances stratospheric ozone depletion. Based on a dual set of 1960–2100 coupled chemistry–climate simulations (i.e. with and without VSLBr), we show that the maximum Antarctic ozone hole depletion increases by up to 14 % when natural VSLBr are considered, which is in better agreement with ozone observations. The impact of the additional 5 pptv VSLBr on Antarctic ozone is most evident in the periphery of the ozone hole, producing an expansion of the ozone hole area of ~5 million km2, which is equivalent in magnitude to the recently estimated Antarctic ozone healing due to the implementation of the Montreal Protocol. We find that the inclusion of VSLBr in CAM-Chem (Community Atmosphere Model with Chemistry, version 4.0) does not introduce a significant delay of the modelled ozone return date to 1980 October levels, but instead affects the depth and duration of the simulated ozone hole. Our analysis further shows that total bromine-catalysed ozone destruction in the lower stratosphere surpasses that of chlorine by the year 2070 and indicates that natural VSLBr chemistry would dominate Antarctic ozone seasonality before the end of the 21st century. As a result, this workmore » suggests a large influence of biogenic bromine on the future Antarctic ozone layer.« less

Authors:
ORCiD logo [1];  [2];  [2];  [2];  [3]
  1. Institute of Physical Chemistry Rocasolano, Madrid (Spain); National Research Council (CONICET); Mendoza (Argentina)
  2. National Center for Atmospheric Research, Boulder, CO (United States)
  3. Institute of Physical Chemistry Rocasolano, Madrid (Spain)
Publication Date:
Research Org.:
Institute for Advanced Study, Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1358422
Grant/Contract Number:  
SC0009988
Resource Type:
Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 17; Journal Issue: 3; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; earth system model; tropical tropopause layer; stratospheric ozone; climate model; iodine chemistry; simulation; bromocarbons; troposphere; substances; emissions

Citation Formats

Fernandez, Rafael P., Kinnison, Douglas E., Lamarque, Jean -Francois, Tilmes, Simone, and Saiz-Lopez, Alfonso. Impact of biogenic very short-lived bromine on the Antarctic ozone hole during the 21st century. United States: N. p., 2017. Web. doi:10.5194/acp-17-1673-2017.
Fernandez, Rafael P., Kinnison, Douglas E., Lamarque, Jean -Francois, Tilmes, Simone, & Saiz-Lopez, Alfonso. Impact of biogenic very short-lived bromine on the Antarctic ozone hole during the 21st century. United States. https://doi.org/10.5194/acp-17-1673-2017
Fernandez, Rafael P., Kinnison, Douglas E., Lamarque, Jean -Francois, Tilmes, Simone, and Saiz-Lopez, Alfonso. Fri . "Impact of biogenic very short-lived bromine on the Antarctic ozone hole during the 21st century". United States. https://doi.org/10.5194/acp-17-1673-2017. https://www.osti.gov/servlets/purl/1358422.
@article{osti_1358422,
title = {Impact of biogenic very short-lived bromine on the Antarctic ozone hole during the 21st century},
author = {Fernandez, Rafael P. and Kinnison, Douglas E. and Lamarque, Jean -Francois and Tilmes, Simone and Saiz-Lopez, Alfonso},
abstractNote = {Active bromine released from the photochemical decomposition of biogenic very short-lived bromocarbons (VSLBr) enhances stratospheric ozone depletion. Based on a dual set of 1960–2100 coupled chemistry–climate simulations (i.e. with and without VSLBr), we show that the maximum Antarctic ozone hole depletion increases by up to 14 % when natural VSLBr are considered, which is in better agreement with ozone observations. The impact of the additional 5 pptv VSLBr on Antarctic ozone is most evident in the periphery of the ozone hole, producing an expansion of the ozone hole area of ~5 million km2, which is equivalent in magnitude to the recently estimated Antarctic ozone healing due to the implementation of the Montreal Protocol. We find that the inclusion of VSLBr in CAM-Chem (Community Atmosphere Model with Chemistry, version 4.0) does not introduce a significant delay of the modelled ozone return date to 1980 October levels, but instead affects the depth and duration of the simulated ozone hole. Our analysis further shows that total bromine-catalysed ozone destruction in the lower stratosphere surpasses that of chlorine by the year 2070 and indicates that natural VSLBr chemistry would dominate Antarctic ozone seasonality before the end of the 21st century. As a result, this work suggests a large influence of biogenic bromine on the future Antarctic ozone layer.},
doi = {10.5194/acp-17-1673-2017},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 3,
volume = 17,
place = {United States},
year = {Fri Feb 03 00:00:00 EST 2017},
month = {Fri Feb 03 00:00:00 EST 2017}
}

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Works referencing / citing this record:

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