posted on 2021-06-16, 12:08authored byPankaj Kumar, Jayanarayanan Kuttippurath, Peter von der Gathen, Irina Petropavlovskikh, Bryan Johnson, Audra McClure-Begley, Paolo Cristofanelli, Paolo Bonasoni, Maria Elena Barlasina, Ricardo Sánchez
A comprehensive
analysis of the temporal evolution of tropospheric
ozone in Antarctica using more than 25 years of surface ozone and
ozonesonde measurements reveals significant changes in tropospheric
ozone there. It shows a positive trend in ozone at the surface and
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 of 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.