Substantial contribution of iodine to Arctic ozone destruction

Nuria Benavent, Anoop S. Mahajan, Qinyi Li, Carlos A. Cuevas, Julia Schmale, Hélène Angot, Tuija Jokinen, Lauriane L. J. Quelever, Anne-Marlene Blechschmidt, Bianca Zilker, Andreas Richter, Jesús A. Serna, David Garcia-Nieto, Rafael P. Fernandez, Henrik Skov, Adela Dumitrascu, Patric Simões Pereira, Katarina Abrahamsson, Silvia Bucci, Marina DütschAndreas Stohl, Ivo Beck, Tiia Laurila, Byron Blomquist, Dean Howard, Stephen D. Archer, Ludovic Bariteau, Detlev Helmig, Jacques Hueber, Hans-Werner Jacobi, Kevin Posman, Lubna Dada, Kaspar R. Daellenbach, Alfonso Saiz-Lopez

Publications: Contribution to journalArticlePeer Reviewed

Abstract

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.

Original languageEnglish
Pages (from-to)770-773
Number of pages4
JournalNature Geoscience
Volume15
Issue number10
Early online date15 Sep 2022
DOIs
Publication statusPublished - Oct 2022

Austrian Fields of Science 2012

  • 105206 Meteorology

Keywords

  • BOUNDARY-LAYER HALOGENS
  • BRO
  • BROMINE
  • EMISSIONS
  • HIGH-RESOLUTION
  • IO
  • MONOXIDE
  • PARTICLE FORMATION

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