Substantial contribution of iodine to Arctic ozone destruction

• Published in: Nature Geoscience
• Main Authors: Benavent, N., Mahajan, Anoop S., Li, Qinyi, Cuevas, Carlos A., Schmale, Julia, Angot, Hélène, Jokinen, Tuija, Quéléver, Lauriane L.J., Blechschmidt, Anne Marlene, Zilker, Bianca, Richter, Andreas, Serna, Jesús A., Garcia-Nieto, D., Fernandez, Rafael P., Skov, Henrik, Dumitrascu, Adela, Simões Pereira, Patric, Abrahamsson, Katarina, Bucci, Silvia, Duetsch, Marina, Stohl, Andreas, Beck, Ivo, Laurila, Tiia, Blomquist, Byron, Howard, Dean, Archer, Stephen D., Bariteau, Ludovic, Helmig, Detlev, Hueber, Jacques, Jacobi, Hans Werner, Posman, Kevin, Dada, Lubna, Daellenbach, Kaspar R., Saiz-Lopez, A.
• Other Authors: European Commission, Consejo Superior de Investigaciones Científicas (España), Academy of Finland, Ministry of Earth Sciences (India), Swiss National Science Foundation, Swiss Polar Institute, National Science Foundation (US), Ferring Pharmaceuticals, German Research Foundation
• Format: Article in Journal/Newspaper
• Language: English
• Published: Nature Publishing Group 2022
• Subjects: Arctic; Indian; Swedish Polar Research Secretariat; Swiss Polar Institute
• Online Access: http://hdl.handle.net/10261/303312; https://doi.org/10.1038/s41561-022-01018-w; https://api.elsevier.com/content/abstract/scopus_id/85138299752

6 pags., 2 figs. 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. This study received funding from the European Research Council Executive Agency under the European Union’s Horizon 2020 Research and Innovation Program (project ERC‐2016‐COG 726349 CLIMAHAL and ERC-2016-STG 714621 GASPARCON) and the European Commission via the EMME-CARE project and was supported by the Consejo Superior de Investigaciones Científicas of Spain. This work was supported by the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement no. 856612 and the Academy of Finland (project no. 334514). The Indian Institute of Tropical Meteorology is funded by the Ministry of Earth Sciences, Government of India. Ozone, CO, CH4 and AMS measurements were funded by the Swiss National Science Foundation (grant 200021_188478), the Swiss Polar Institute and U.S. National Science Foundation grants 1914781 and 1807163. J.S. holds the Ingvar Kamprad chair for extreme environments research, sponsored by Ferring Pharmaceuticals. Data reported in this manuscript were produced as part of the international MOSAiC expedition with tag MOSAiC20192020, with activities supported by Polarstern expedition AWI-PS122_00. H.S. was funded by the European ERA-PLANET projects iGOSP and iCUPE (consortium agreement no. 689443 for both projects). We thank FORMAS and the Swedish Polar Research Secretariat for support. We gratefully acknowledge funding by the Deutsche Forschungsgemeinschaft (project no. 268020496 – TRR 172) within the Transregional Collaborative Research Center ‘ArctiC Amplification: ...