Observations of iodine monoxide over three summers  at the Indian Antarctic bases of Bharati and Maitri

Mahajan, Anoop S.; Biswas, Mriganka S.; Beirle, Steffen; Wagner, Thomas; Schönhardt, Anja; Benavent, Nuria; Saiz-Lopez, Alfonso

doi:https://doi.org/10.5194/acp-21-11829-2021

Articles | Volume 21, issue 15

https://doi.org/10.5194/acp-21-11829-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-11829-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 15

Research article

|

09 Aug 2021

Research article |

| 09 Aug 2021

Observations of iodine monoxide over three summers at the Indian Antarctic bases of Bharati and Maitri

Anoop S. Mahajan, Mriganka S. Biswas, Steffen Beirle, Thomas Wagner, Anja Schönhardt, Nuria Benavent, and Alfonso Saiz-Lopez

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Preprint (discussion started on 20 Nov 2020)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review of "Observations of iodine monoxide over three summers at the Indian Antarctic Bases, Bharati and Maitri" by Mahajan et al.', Anonymous Referee #1, 30 Dec 2020
EC1: 'Review of acp-2020-998', Jayanarayanan Kuttippurath, 20 Jan 2021
AC1: 'Comment on acp-2020-998', Anoop Mahajan, 11 Mar 2021

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Anoop Mahajan on behalf of the Authors (11 Mar 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (16 Mar 2021) by Jayanarayanan Kuttippurath

RR by Anonymous Referee #1 (19 Apr 2021)

ED: Publish subject to minor revisions (review by editor) (21 Apr 2021) by Jayanarayanan Kuttippurath

AR by Anoop Mahajan on behalf of the Authors (28 Apr 2021) Author's response Author's tracked changes Manuscript

ED: Publish as is (30 Apr 2021) by Jayanarayanan Kuttippurath

AR by Anoop Mahajan on behalf of the Authors (07 Jul 2021) Manuscript

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Short summary

Iodine plays a vital role in oxidation chemistry over Antarctica, with past observations showing highly elevated levels of iodine oxide (IO) leading to severe depletion of boundary layer ozone. We present IO observations over three summers (2015–2017) at the Indian Antarctic bases of Bharati and Maitri. IO was observed during all campaigns with mixing ratios below 2 pptv, which is lower than the peak levels observed in West Antarctica, showing the differences in regional chemistry and emissions.