Articles | Volume 22, issue 16
https://doi.org/10.5194/acp-22-10993-2022
https://doi.org/10.5194/acp-22-10993-2022
Research article
 | 
30 Aug 2022
Research article |  | 30 Aug 2022

Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns

Catherine Wespes, Gaetane Ronsmans, Lieven Clarisse, Susan Solomon, Daniel Hurtmans, Cathy Clerbaux, and Pierre-François Coheur

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Latest update: 20 Nov 2024
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Short summary
The first 10-year data record (2008–2017) of HNO3 total columns measured by the IASI-A/MetOp infrared sounder is exploited to monitor the relationship between the temperature decrease and the HNO3 loss observed each year in the Antarctic stratosphere during the polar night. We verify the recurrence of specific regimes in the cycle of IASI HNO3 and identify the day and the 50 hPa temperature (drop temperature) corresponding to the onset of denitrification in Antarctic winter for each year.
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