Preprints
https://doi.org/10.5194/acp-2020-1313
https://doi.org/10.5194/acp-2020-1313

  24 Feb 2021

24 Feb 2021

Review status: a revised version of this preprint was accepted for the journal ACP and is expected to appear here in due course.

Arctic on the verge of an ozone hole?

Jayanarayanan Kuttippurath1, Wuhu Feng2,3, Rolf Müller4, Pankaj Kumar1, Sarath Raj1, Gopalakrishna Pillai Gopikrishnan1, and Raina Roy5 Jayanarayanan Kuttippurath et al.
  • 1CORAL, Indian Institute of Technology Kharagpur, Kharagpur–721302, India
  • 2School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
  • 3National Centre for Atmospheric Science, University of Leeds, Leeds, LS2 9PH, UK
  • 4Forschungszentrum Jülich GmbH (IEK-7), 52425 Jülich, Germany
  • 5Department of Physical Oceanography, Cochin University of Science and Technology, Kochi, India

Abstract. Severe vortex-wide ozone loss in the Arctic would expose nearly 650 million people and ecosystem to unhealthy ultra-violet radiation levels. Adding to these worries, and extreme weather events as the harbingers of climate change, clear signature of an ozone hole (ozone column values below 220 DU) appeared over the Arctic in March and April 2020. Sporadic occurrences of ozone hole values at different regions of vortex for almost three weeks were found for the first time in the observed history in the Arctic. Furthermore, a record-breaking ozone loss of about 2.0–3.4 ppmv triggered by an unprecedented chlorine activation (1.5–2.2 ppbv) matching to the levels of Antarctic ozone hole conditions was also observed. The polar processing situation led to the first-ever appearance of loss saturation in the Arctic. Apart from these, there were also ozone-mini holes in December 2019 and January 2020 driven by atmospheric dynamics. The large loss in ozone in the colder Arctic winters is intriguing and that demands rigorous monitoring of the region. Our study suggests that the very colder Arctic winters in near future would also very likely to experience even more ozone loss and encounter ozone hole situations, provided the stratospheric chlorine levels still stay high there.

Jayanarayanan Kuttippurath et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2020-1313', Anonymous Referee #2, 25 Mar 2021
    • AC1: 'Reply on RC1', Jayanarayanan Kuttippurath, 07 Jul 2021
  • RC2: 'Review of acp-2020-1313', Anonymous Referee #1, 29 Mar 2021
  • CC1: 'Comment on acp-2020-1313', Gloria Manney, 31 Mar 2021
  • AC4: 'Revised MS', Jayanarayanan Kuttippurath, 07 Jul 2021
  • AC5: 'Supporting info', Jayanarayanan Kuttippurath, 07 Jul 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2020-1313', Anonymous Referee #2, 25 Mar 2021
    • AC1: 'Reply on RC1', Jayanarayanan Kuttippurath, 07 Jul 2021
  • RC2: 'Review of acp-2020-1313', Anonymous Referee #1, 29 Mar 2021
  • CC1: 'Comment on acp-2020-1313', Gloria Manney, 31 Mar 2021
  • AC4: 'Revised MS', Jayanarayanan Kuttippurath, 07 Jul 2021
  • AC5: 'Supporting info', Jayanarayanan Kuttippurath, 07 Jul 2021

Jayanarayanan Kuttippurath et al.

Jayanarayanan Kuttippurath et al.

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Short summary
The Arctic winter 2020 was one of the coldest with a strong and long-lasting vortex, high Chlorine activation, and unprecedented ozone loss. The ozone loss was even equal to the levels of some of the warm Antarctic winters. Clear signatures of ozone holes with total column ozone values below 220 DU for several weeks and ozone loss saturation were observed in the Arctic winter. The results indicate the changes in the climate of the polar region.
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