Articles | Volume 21, issue 15
https://doi.org/10.5194/acp-21-11829-2021
https://doi.org/10.5194/acp-21-11829-2021
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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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.
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