Role of sulfur dioxide in stratospheric polar cloud formation and ozone destruction in the winter-spring stratosphere of the Arctic using Aura MLS observations

In this report, we study the maximal SO2 concentrations and total SO2 columns at four Arctic sites: Eureka, Canada; Ny-Ålesund, Norway; Thule, Greenland; and Resolute, Canada. For this, we use the data on the minimal temperature, maximal negative deviations of ozone concentration from multiyear average, and maximal sulfur dioxide concentration in the Arctic stratosphere, as well as the total ozone and sulfur dioxide columns, calculated from the respective altitude profiles. The temperature and ozone mixing ratio profiles are obtained from the Aura MLS observations for 2005-2022; and the sulfur dioxide mixing ratio profiles are calculated from Aura MLS observations for 2010/11, 2019/20, 2020/21, and 2021/22. The results of this report can be useful for studying of how SO2 affects the polar stratospheric cloud formation and O3 destruction in the winter-spring stratosphere of the Arctic.