Ozone Chemistry during the 2002 Antarctic Vortex Split

Vortex - averaged Arctic ozone depletion in the winter 2002 / 2003

A total ozone depletion of 68±7 Dobson units between 380 and 525 K from 10 December 2002 to 10 March 2003 is derived from ozone sonde data by the vortex-average method, taking into account both diabatic descent of the air masses and transport of air into the vortex. When the vortex is divided into three equal-area regions, the results are 85±9 DU for the collar region (closest to the edge), 52±...

The southern hemisphere ozone hole split in 2002.

Among the most important aspects of the atmospheric pollution problem are the anthropogenic impacts on the stratospheric ozone layer, the related trends of the total ozone content drop and the solar ultraviolet radiation enhancement at the Earth's surface level. During September 2002, the ozone hole over the Antarctic was much smaller than in the previous six years. It has split into two separa...

The 2007 Antarctic ozone hole

Antarctic ozone variability inside the polar vortex estimated from balloon measurements

Thirteen years of ozone soundings at the Antarctic Belgrano II station (78 S, 34.6 W) have been analysed to establish a climatology of stratospheric ozone and temperature over the area. The station is inside the polar vortex during the period of development of chemical ozone depletion. Weekly periodic profiles provide a suitable database for seasonal characterization of the evolution of stratos...

Changes in the polar vortex: Effects on Antarctic total ozone observations at various stations

[1] October mean total column ozone data from four Antarctic stations form the basis for understanding the evolution of the ozone hole since 1960. While these stations show similar emergence of the ozone hole from 1960 to 1980, the records are divergent in the last two decades. The effects of long‐term changes in vortex shape and location are considered by gridding the measurements by equivalen...