Articles | Volume 25, issue 15
https://doi.org/10.5194/acp-25-8355-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-8355-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
01 Aug 2025
Research article |
| 01 Aug 2025
| 01 Aug 2025
Modelling Arctic lower-tropospheric ozone: processes controlling seasonal variations
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
Stephen R. Beagley
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
Kenjiro Toyota
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
Henrik Skov
Department of Environmental Science, iClimate, Aarhus University, Roskilde, 4000, Denmark
Jesper Heile Christensen
Department of Environmental Science, iClimate, Aarhus University, Roskilde, 4000, Denmark
Alex Lupu
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
Diane Pendlebury
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
Junhua Zhang
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
Department of Environmental Science, iClimate, Aarhus University, Roskilde, 4000, Denmark
Yugo Kanaya
Research Institute for Global Change (RIGC), Japan Agency for Marine–Earth Science and Technology (JAMSTEC), Yokohama 2360001, Japan
Alfonso Saiz-Lopez
Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Blas Cabrera, CSIC, Madrid, 28006, Spain
Roberto Sommariva
School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
School of Chemistry, University of Leicester, Leicester, UK
Peter Effertz
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USA
National Oceanic and Atmospheric Administration Global Monitoring Laboratory, Boulder, CO 80305, USA
John W. Halfacre
Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, YO10 5DD, UK
Nis Jepsen
Research and Development, Danish Meteorological Institute, 2100 Copenhagen, Denmark
Rigel Kivi
Space and Earth Observation Centre, Finnish Meteorological Institute, Tähteläntie 62, 99600 Sodankylä, Finland
Theodore K. Koenig
Division of Environment and Sustainability, The Hong Kong University of Science and Technology, 999077, Hong Kong SAR, China
Katrin Müller
Alfred Wegener Institute (AWI), Helmholtz Centre for Polar and Marine Research, Telegrafenberg A43, 14473 Potsdam, Germany
Claus Nordstrøm
Department of Environmental Science, iClimate, Aarhus University, Roskilde, 4000, Denmark
Irina Petropavlovskikh
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, USA
National Oceanic and Atmospheric Administration Global Monitoring Laboratory, Boulder, CO 80305, USA
Paul B. Shepson
The School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794, USA
William R. Simpson
Department of Chemistry, Biochemistry, and Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775-6160, USA
Sverre Solberg
Norwegian Institute for Air Research (NILU), Kjeller, Norway
Ralf M. Staebler
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
David W. Tarasick
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
Roeland Van Malderen
Royal Meteorological Institute of Belgium (KMI), Solar-Terrestrial Centre of Excellence, Brussels, Belgium
Mika Vestenius
Atmospheric Composition Research, Finnish Meteorological Institute, Air Quality Expert services, 00101 Helsinki, Finland
Data sets
GEM-MACH data for TOARII paper analysis for year 2015 v1.0.0 S. Beagley et al. https://doi.org/10.5281/zenodo.14237307
EBAS database Norwegian Institute for Air Research https://ebas.nilu.no/
Data repository NSF Arctic Data Center https://arcticdata.io/
WOUDC (World Ozone and Ultraviolet Radiation Data Centre) ECCC (Environment and Climate Change Canada) https://www.woudc.org/en/data/data-access
Ozonesonde data NDACC https://ndacc.larc.nasa.gov
Open Data Portal Government of Canada https://search.open.canada.ca/opendata/
Model code and software
Arctic-GEMMACH-Bromine24: v1.0.0 S. Beagley et al. https://doi.org/10.5281/zenodo.14217327
Short summary
This study showed that the springtime O3 depletion plays a critical role in driving the surface O3 seasonal cycle in the central Arctic. The O3 depletion events, while occurring most notably within the lowest few hundred metres above the Arctic Ocean, can induce a 5–7 % loss in the pan-Arctic tropospheric O3 burden during springtime. The study also found enhancements in O3 and NOy (mostly peroxyacetyl nitrate) concentrations in the Arctic due to northern boreal wildfires, particularly at higher altitudes.
This study showed that the springtime O3 depletion plays a critical role in driving the surface...
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