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Projected global ground-level ozone impacts on vegetation under different emission and climate scenarios

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Sicard, Pierre, Anav, Alessandro, De Marco, Alessandra, Paoletti, Elena·2017·Atmospheric Chemistry and Physics

Abstract

Abstract. The impact of ground-level ozone (O3) on vegetation is largely under-investigated at the global scale despite large areas worldwide that are exposed to high surface O3 levels. To explore future potential impacts of O3 on vegetation, we compared historical and projected surface O3 concentrations simulated by six global atmospheric chemistry transport models on the basis of three representative concentration pathways emission scenarios (i.e. RCP2.6, 4.5, 8.5). To assess changes in the potential surface O3 threat to vegetation at the global scale, we used the AOT40 metric. Results point out a significant exceedance of AOT40 in comparison with the recommendations of UNECE for the protection of vegetation. In fact, many areas of the Northern Hemisphere show that AOT40-based critical levels will be exceeded by a factor of at least 10 under RCP8.5. Changes in surface O3 by 2100 worldwide range from about +4–5 ppb in the RCP8.5 scenario to reductions of about 2–10 ppb in the most optimistic scenario, RCP2.6. The risk of O3 injury for vegetation, through the potential O3 impact on photosynthetic assimilation, decreased by 61 and 47 % under RCP2.6 and RCP4.5, respectively, and increased by 70 % under RCP8.5. Key biodiversity areas in southern and northern Asia, central Africa and North America were identified as being at risk from high O3 concentrations.

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Metadata

Authors
Sicard, P., Anav, A., De Marco, A., & Paoletti, E.
Venue
Atmospheric Chemistry and Physics
Published
2017-10-12
Volume
17
Issue
19
Pages
12177-12196
ISSN
  • 1680-7316 (ISSN-L)
  • 1680-7324
OpenAlex
W2593386112
Cited by
240
References
6
FWCI
21.46
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Projected global ground-level ozone impacts on vegetation under different emission and climate scenarios. https://app.cochat.ai/papers/10.5194/acp-17-12177-2017
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Sicard, P., Anav, A., De Marco, A., & Paoletti, E. (2017). Projected global ground-level ozone impacts on vegetation under different emission and climate scenarios. Atmospheric Chemistry and Physics. https://doi.org/10.5194/acp-17-12177-2017

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