The Role of Natural Halogens in Global Tropospheric Ozone Chemistry and Budget Under Different 21st Century Climate Scenarios
Open accessAbstract
Abstract Tropospheric ozone ( ) is an important greenhouse gas and a surface pollutant. The future evolution of 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 budget over the 21st century following Representative Concentration Pathway (RCP)6.0 and RCP8.5 climate scenarios. Our results indicate that the global tropospheric net chemical change (NCC, chemical gross production minus destruction) will decrease , 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 precursor emissions. Water vapor and iodine are found to be key drivers of future tropospheric destruction, while the largest changes in 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 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.
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Modelled tropospheric burden of ozone is 11-15% lower throughout the twenty-first century if natural halogenated VSLS are included.
“Modelled tropospheric burden of ozone is 11–15% lower throughout the twenty-first century if natural halogenated VSLS are included (see Fig. 4) [80].”
Inclusion of halogen chemistry in models results in a considerably lower estimate of the burden of ozone in the troposphere.
“Inclusion of halogen chemistry in models results in a considerably lower estimate of the burden of ozone in the troposphere [80].”
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References 78 · Cited by 35
- Authors
- Badia, A., Iglesias‐Suarez, F., Fernandez, R. P., Cuevas, C. A., Kinnison, D. E., Lamarque, J., Griffiths, P. T., Tarasick, D. W., Liu, J., & Saiz‐Lopez, A.
- Affiliations
- Department of Atmospheric Chemistry and Climate Institute of Physical Chemistry Rocasolano CSIC Madrid Spain
- Consejo Superior de Investigaciones Científicas (ES)
- NSF National Center for Atmospheric Research (US)
- Climate and Global Dynamics Laboratory NCAR Boulder CO USA
- University of Cambridge (GB)
- Environment and Climate Change Canada (CA)
- University of Toronto (CA)
- Corresponding author
- Saiz‐Lopez, Alfonso
- ORCID
- Venue
- Journal of Geophysical Research: Atmospheres
- Publisher
- American Geophysical Union (AGU)
- Published
- 2021-10-19
- Volume
- 126
- Issue
- 20
- ISSN
- 0148-0227 (ISSN-L)
- 2169-897X
- 2169-8996
- OpenAlex
- W3202927402
- Cited by
- 35
- References
- 78
- Citations by year
- 2026: 6 · 2025: 7 · 2024: 7 · 2023: 7 · 2022: 8
- FWCI
- 1.93
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Geophysical Research Atmospheres (publishedVersion, cc-by-nc-nd)
- Bristol Research (University of Bristol) (publishedVersion, cc-by-nc-nd)
- elib (German Aerospace Center) (acceptedVersion)
- Dipòsit Digital de Documents de la UAB (Universitat Autònoma de Barcelona) (submittedVersion, cc-by-nc-nd)
- DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, cc-by-nc-nd)
- Apollo (University of Cambridge) (submittedVersion, cc-by-nc-nd)
- Apollo
- Funders
- H2020 European Research Council (ERC‐2016‐COG726349)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric Ozone and Climate
- Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric aerosols and clouds
- Keywords
- tropospheric ozone, iodine chemistry, ozone budget, ozone degradation, ozone formation, peroxy radicals, water vapor, climate change projections, RCP6.0, RCP8.5, greenhouse gases, Earth system models, precursor emissions
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