Lecturer: Uwe Raffalski (IRF)
Date: 2020-09-10 10:00
Place: Aulan

Unusually Low Ozone due to strong PSC appearance during Winter 2019/20

Uwe Raffalski
Swedish Institute of Space Physics

The winter 2019/20 showed unusually persistent periods of rather strong
appearances of Polar Stratospheric Clouds, PSC, in the Arctic. The PSC
season also started already in November 2019 and the formation
temperature for PSC had been reached as late as mid February. These PSC
occurences lead to an unprecedented early start of Arctic ozone
depletion and subsequent low ozone volume mixing ratios during the
entire winter until the disappearance of the PSC. The MIllimeter wave
RAdiometer, MIRA2, of the Institute of Meteorology and Climate Research
at Karlsruhe Institute of Technology has been measureing stratospheric
ozone continuously during the entire period of interest from October
2019 through April 2020. The ozone depletion due to Polar Stratospheric
Clouds is presented here along with a comparison to the AURA-MLS data set.

Created 2020-05-26 10:52:56 by Mats Holmström
Last changed 2020-09-01 08:54:11 by Mats Holmström