Since middle 70īs the existence of a strong spring depletion in the stratospheric ozone over Antarctica is observed. Thereafter the extend and depth of this depletion has been increasing.
In this paper the evolution of the phenomenon through a statistical analysis of the ozone concentration and irradiances in Antarctic and Sub-Antarctic regions is performed.
For the ozone analysis TOMS data is used, and for irradiances the source is the NSF UV Radiation Monitoring Network.
In many cases linear trends seem to fit for partial time series, while for the whole time series more elaborated trends provide a better picture of the evolution.