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Title: Substantial contribution of iodine to Arctic ozone destruction

Journal Article · · Nature Geoscience (Online)
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  1. Institute of Physical Chemistry Rocasolano, Madrid (Spain)
  2. Indian Institute of Tropical Meteorology, Pune (India)
  3. Ecole Polytechnique Federale Lausanne Valais Wallis, Sion (Switzerland)
  4. University of Helsinki (Finland); Cyprus Institute, Aglantzia (Cyprus)
  5. University of Helsinki (Finland)
  6. University of Bremen (Germany)
  7. National Research Council, Mendoza (Argentina)
  8. Aarhus University, Roskilde (Denmark)
  9. University of Gothenburg (Sweden)
  10. University of Vienna (Austria)
  11. University of Colorado, Boulder, CO (United States)
  12. Bigelow Laboratory for Ocean Sciences, Boothbay, ME (United States)
  13. University of Grenoble Alpes, Grenoble (France)
  14. Paul Scherrer Institute (PSI), Villigen (Switzerland)
+ Show Author Affiliations

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Atmospheric Radiation Measurement (ARM) Data Center
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); European Research Council (ERC); Consejo Superior de Investigaciones Científicas of Spain; Ministry of Earth Sciences, Government of India; Swiss National Science Foundation (SNSF); Swiss Polar Institute; National Science Foundation (NSF); European ERA-PLANET; German Research Foundation (DFG)
Grant/Contract Number:
AC05-76RL01830; 200021_188478; 1914781; 1807163
OSTI ID:
1957718
Journal Information:
Nature Geoscience (Online), Vol. 15, Issue 10; ISSN 1752-0908
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (31)

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Chlorine, Bromine AND Iodine in arctic aerosols journal January 1988
Iodine oxide in the global marine boundary layer journal January 2015
Rapid increase in atmospheric iodine levels in the North Atlantic since the mid-20th century journal April 2018
Field-Deployable, High-Resolution, Time-of-Flight Aerosol Mass Spectrometer journal December 2006
Molecular-scale evidence of aerosol particle formation via sequential addition of HIO3 journal August 2016
Simultaneous satellite observations of IO and BrO over Antarctica journal July 2012
ATom: L2 Particulate Iodine from High-Resolution Aerosol Mass Spectrometer (HR-AMS) collection January 2020
Extensive halogen-mediated ozone destruction over the tropical Atlantic Ocean journal June 2008
Iodine observed in new particle formation events in the Arctic atmosphere during ACCACIA journal January 2015
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Ground-based imaging differential optical absorption spectroscopy of atmospheric gases journal January 2004
MOSAiC Extended Acknowledgement other January 2021
Reactive halogen chemistry in the troposphere journal January 2012
A mechanism for biologically induced iodine emissions from sea ice journal January 2015
Overview of the MOSAiC expedition: Atmosphere journal January 2022
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Atmospheric Chemistry of Iodine journal October 2011
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A Factor and Trends Analysis of Multidecadal Lower Tropospheric Observations of Arctic Aerosol Composition, Black Carbon, Ozone, and Mercury at Alert, Canada journal December 2019
Evaluation of Composition-Dependent Collection Efficiencies for the Aerodyne Aerosol Mass Spectrometer using Field Data journal March 2012
Active molecular iodine photochemistry in the Arctic journal September 2017
Measurements of iodine monoxide (IO) above Spitsbergen journal May 2000
Ozone destruction and photochemical reactions at polar sunrise in the lower Arctic atmosphere journal July 1988
Atmospheric iodine levels influenced by sea surface emissions of inorganic iodine journal January 2013
ATom: Merged Atmospheric Chemistry, Trace Gases, and Aerosols collection January 2018
Comparison of airborne measurements of NO, NO2, HONO, NOy, and CO during FIREX-AQ journal August 2022
Atmospheric sulphuric acid and neutral cluster measurements using CI-APi-TOF journal January 2012

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