Substantial contribution of iodine to Arctic ozone destruction

• Published in: Nature Geoscience
• Main Authors: Benavent, Nuria, Mahajan, Anoop, Li, Qinyi, Cuevas, Carlos, Schmale, Julia, Angot, Hélène, Jokinen, Tuija, Quéléver, Lauriane, Blechschmidt, Anne-Marlene, Zilker, Bianca, Richter, Andreas, Serna, Jesús, Garcia-Nieto, David, Fernandez, Rafael, 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, Bariteau, Ludovic, Helmig, Detlev, Hueber, Jacques, Jacobi, Hans-Werner, Posman, Kevin, Dada, Lubna, Daellenbach, Kaspar, Saiz-Lopez, Alfonso
• Other Authors: Instituto de Química Física Rocasolano (IQFR), Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute for Atmospheric and Earth System Research (INAR), Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Universität Bremen, iCLIMATE Aarhus University Interdisciplinary Centre for Climate Change, Aarhus University Aarhus, Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL), Institut für Meteorologie und Geophysik Wien (IMGW), Universität Wien = University of Vienna
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2022
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Arctic
• Online Access: https://hal.science/hal-03779484; https://hal.science/hal-03779484/document; https://hal.science/hal-03779484/file/s41561-022-01018-w-1.pdf; https://doi.org/10.1038/s41561-022-01018-w

International audience 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.