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The role of natural halogens in global tropospheric ozone chemistry and budget under different 21st century climate scenarios

Badia, Alba and Iglesias-Suarez, Fernando and Fernandez, Rafael P. and Cuevas, Carlos A. and Kinnison, D. E. and Lamarque, J. F. and Griffiths, Paul T. and Tarasick, David and Liu, Jane and Saiz-Lopez, Alfonso (2021) The role of natural halogens in global tropospheric ozone chemistry and budget under different 21st century climate scenarios. Journal of Geophysical Research: Atmospheres. Wiley. doi: 10.1029/2021JD034859. ISSN 2169-897X.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JD034859

Abstract

Tropospheric ozone (03) is an important greenhouse gas and a surface pollutant. The future evolution of O3 abundances and chemical processing are uncertain due to a changing climate, socioeconomic developments, and missing chemistry in global models. Here, we use an Earth System Model with natural halogen chemistry to investigate the changes in the O3 budget over the 21st century following RCP6.0 and RCP8.5 climate scenarios. Our results indicate that the global tropospheric O3 net chemical change (NCC, chemical gross production minus destruction) will decrease -50%, notwithstanding increasing or decreasing trends in ozone production and loss. However, a wide range of surface NCC variations (from -60% to 150%) are projected over polluted regions with stringent abatements in O3 precursor emissions. Water vapour and iodine are found to be key drivers of future tropospheric O3 destruction, while the largest changes in O3 production are determined by the future evolution of peroxy radicals. We show that natural halogens, currently not considered in climate models, significantly impact on the present-day and future global O3 burden reducing - 30-35 Tg (11-15%) of tropospheric ozone throughout the 21st century regardless of the RCP scenario considered. This highlights the importance of including natural halogen chemistry in climate model projections of future tropospheric ozone.

Item URL in elib:https://elib.dlr.de/144404/
Document Type:Article
Title:The role of natural halogens in global tropospheric ozone chemistry and budget under different 21st century climate scenarios
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Badia, AlbaCSIC, Madrid, SpanienUNSPECIFIEDUNSPECIFIED
Iglesias-Suarez, FernandoDLR, IPAhttps://orcid.org/0000-0003-3403-8245UNSPECIFIED
Fernandez, Rafael P.CSIC, Madrid, SpanienUNSPECIFIEDUNSPECIFIED
Cuevas, Carlos A.CSIC, Madrid, SpanienUNSPECIFIEDUNSPECIFIED
Kinnison, D. E.NCAR, Boulder, CO, USAUNSPECIFIEDUNSPECIFIED
Lamarque, J. F.NCAR, Boulder, Colorado, USAUNSPECIFIEDUNSPECIFIED
Griffiths, Paul T.Centre for Atmospheric Science, Cambridge University, UKUNSPECIFIEDUNSPECIFIED
Tarasick, DavidEnvironment and Climate Change Canada, Downsview, Ontario, CAUNSPECIFIEDUNSPECIFIED
Liu, JaneDepartment of Geography, University of Toronto, CanadaUNSPECIFIEDUNSPECIFIED
Saiz-Lopez, AlfonsoCSIC, Madrid, SpanienUNSPECIFIEDUNSPECIFIED
Date:2 October 2021
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1029/2021JD034859
Publisher:Wiley
ISSN:2169-897X
Status:Published
Keywords:Ozone, halogen chemistry, climate change, modelling, Earth System Model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Model Evaluation and Analysis
Deposited By: Langer, Michaela
Deposited On:06 Oct 2021 14:50
Last Modified:11 Dec 2023 09:13

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