The Role of Natural Halogens in Global Tropospheric Ozone Chemistry and Budget Under Different 21st Century Climate Scenarios
Authors
Publication Date
2021Journal Title
Journal of Geophysical Research: Atmospheres
ISSN
2169-897X
Publisher
American Geophysical Union (AGU)
Volume
126
Issue
20
Language
en
Type
Article
This Version
AO
VoR
Metadata
Show full item recordCitation
Badia, A., Iglesias-Suarez, F., Fernandez, R., Cuevas, C., Kinnison, D., Lamarque, J., Griffiths, P., et al. (2021). The Role of Natural Halogens in Global Tropospheric Ozone Chemistry and Budget Under Different 21st Century Climate Scenarios. Journal of Geophysical Research: Atmospheres, 126 (20) https://doi.org/10.1029/2021JD034859
Description
Funder: NSF
Funder: Office of Science of the US Department of Energy
Funder: PICT‐2016‐0714 (ANPCyT)
Funder: i‐COOP‐B20331 (CSIC + CONICET)
Abstract
Abstract: Tropospheric ozone ( O 3 ) is an important greenhouse gas and a surface pollutant. The future evolution of O 3 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 O 3 budget over the 21st century following Representative Concentration Pathway (RCP)6.0 and RCP8.5 climate scenarios. Our results indicate that the global tropospheric O 3 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 O 3 precursor emissions. Water vapor and iodine are found to be key drivers of future tropospheric O 3 destruction, while the largest changes in O 3 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 O 3 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.
Keywords
Composition and Chemistry, ATMOSPHERIC COMPOSITION AND STRUCTURE, Evolution of the atmosphere, Troposphere: composition and chemistry, Air/sea constituent fluxes, Biosphere/atmosphere interactions, Volcanic effects, BIOGEOSCIENCES, Climate dynamics, Modeling, COMPUTATIONAL GEOPHYSICS, Numerical solutions, CRYOSPHERE, Avalanches, Mass balance, GEODESY AND GRAVITY, Ocean monitoring with geodetic techniques, Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions, Global change from geodesy, GLOBAL CHANGE, Global climate models, Abrupt/rapid climate change, Atmosphere, Climate variability, Earth system modeling, Impacts of global change, Land/atmosphere interactions, Oceans, Regional climate change, Sea level change, Solid Earth, Water cycles, HYDROLOGY, Climate impacts, Hydrological cycles and budgets, INFORMATICS, MARINE GEOLOGY AND GEOPHYSICS, Gravity and isostasy, ATMOSPHERIC PROCESSES, Climate change and variability, Ocean/atmosphere interactions, Climatology, General circulation, Regional modeling, Theoretical modeling, OCEANOGRAPHY: GENERAL, Climate and interannual variability, Numerical modeling, NATURAL HAZARDS, Atmospheric, Geological, Oceanic, Physical modeling, Climate impact, Risk, Disaster risk analysis and assessment, OCEANOGRAPHY: PHYSICAL, Air/sea interactions, Decadal ocean variability, Ocean influence of Earth rotation, Sea level: variations and mean, Surface waves and tides, Tsunamis and storm surges, PALEOCEANOGRAPHY, POLICY SCIENCES, Benefit‐cost analysis, RADIO SCIENCE, Radio oceanography, SEISMOLOGY, Earthquake ground motions and engineering seismology, Volcano seismology, TECTONOPHYSICS, Evolution of the Earth, VOLCANOLOGY, Volcano/climate interactions, Atmospheric effects, Volcano monitoring, Effusive volcanism, Mud volcanism, Explosive volcanism, Volcanic hazards and risks, Research Article, ozone, halogens, climate, chemistry, emission
Sponsorship
EC, H2020, H2020 Priority Excellent Science, H2020 European Research Council (ERC) (ERC‐2016‐COG726349)
Identifiers
jgrd57367, 2021jd034859
External DOI: https://doi.org/10.1029/2021JD034859
This record's URL: https://www.repository.cam.ac.uk/handle/1810/329628
Rights
Licence:
http://creativecommons.org/licenses/by-nc-nd/4.0/
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