The increasing surface and tropospheric ozone in Antarctica and their possible drivers

A comprehensive analysis of the temporal evolution of tropospheric ozone in Antarctica using more than 25 years of surface and ozonesonde measurements reveals significant changes in tropospheric ozone there. It shows a positive trend in ozone at the surface lower and mid-troposphere, but a negative...

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Bibliographic Details
Published in:Environmental Science & Technology
Main Authors: Kumar, Pankaj, Kuttippurath, Jayanarayanan, von der Gathen, Peter, Petropavlovskikh, Irina, Johnson, Bryan, McClure-Begley, Audra, Cristofanelli, Paolo, Bonasoni, Paolo, Barlasina, Maria Elena, Sánchez, Ricardo
Format: Article in Journal/Newspaper
Language:unknown
Published: ACS Publications 2021
Subjects:
Antarc*
Antarctica
Online Access:https://epic.awi.de/id/eprint/53875/
https://hdl.handle.net/10013/epic.b4b3db9a-adc4-43de-ae92-414f109f9504
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Summary:A comprehensive analysis of the temporal evolution of tropospheric ozone in Antarctica using more than 25 years of surface and ozonesonde measurements reveals significant changes in tropospheric ozone there. It shows a positive trend in ozone at the surface lower and mid-troposphere, but a negative trend in the upper troposphere. We also find significant links between different climate modes and tropospheric ozone in Antarctica and observe that changes in residual overturning circulation, the strength of the polar vortex, and stratosphere-troposphere exchange make noticeable variability in tropospheric ozone. Therefore, this study alerts increasing ozone concentration in Antarctica, which would have a profound impact on the future climate of the region as tropospheric ozone has warming feedback to the Earth’s climate.

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