Journal
NATURE GEOSCIENCE
Volume 15, Issue 10, Pages 770-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41561-022-01018-w
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Funding
- European Research Council Executive Agency under the European Union's Horizon 2020 Research and Innovation Program [ERC-2016-COG 726349 CLIMAHAL, ERC-2016-STG 714621 GASPARCON]
- European Commission via the EMME-CARE project
- Consejo Superior de Investigaciones Cientificas of Spain
- European Union's Horizon 2020 Research and Innovation Programme [856612]
- Academy of Finland [334514]
- Swiss National Science Foundation [200021_188478]
- Swiss Polar Institute
- U.S. National Science Foundation [1914781, 1807163]
- Ministry of Earth Sciences, Government of India
- Ferring Pharmaceuticals
- Polarstern expedition [AWI-PS122_00]
- European ERA-PLANET project iGOSP [689443]
- European ERA-PLANET project iCUPE [689443]
- FORMAS
- Swedish Polar Research Secretariat
- Deutsche Forschungsgemeinschaft within the Transregional Collaborative Research Center 'ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)3' [268020496 - TRR 172]
- Academy of Finland (AKA) [334514, 334514] Funding Source: Academy of Finland (AKA)
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The study found that iodine chemistry plays a more important role than bromine chemistry in tropospheric ozone losses in the Arctic. Chemical reactions between iodine and ozone were identified as the second highest contributor to ozone loss over the study period.
Unlike bromine, the effect of iodine chemistry on the Arctic surface ozone budget is poorly constrained. We present ship-based measurements of halogen oxides in the high Arctic boundary layer from the sunlit period of March to October 2020 and show that iodine enhances springtime tropospheric ozone depletion. We find that chemical reactions between iodine and ozone are the second highest contributor to ozone loss over the study period, after ozone photolysis-initiated loss and ahead of bromine. Iodine chemistry plays a more important role than bromine chemistry in tropospheric ozone losses in the Arctic, according to ship-based observations of halogen oxides from March to October 2020.
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