Evolution of ozone depletion on Antarctic and Sub-Antarctic regions

DIAZ, S; A. PALADINI; DEFERRARI, G.; VRSALOVICH, J.

Proc SPIE

The International Society for Optics and Photonics

Año: 2013 vol. 8795 p. 1 - 9

ESTE TRABAJO PASO POR PROCESO DE REVISION. LOS PROCEEDINGS DEL SPIE SON INDEXADOS EN ISI Index to Scientific and Technical Proceedings (ISTP), Thomson Reuters, http://thomsonreuters.com/conference-proceedings-citation-index/, 1st International Conference on Remote Sensing and Geoinformation of the Environment (RSCy)). At the middle eighties, strong stratospheric ozone depletion during spring was discovered over Antarctica. Since then, the scientific community has put large efforts in performing studies directed to evaluate the magnitude and consequences of this depletion and to take the necessary measures to revert the situation to the scenarios before 1970. In 1987, the Montreal Protocol established a list of ozone depleting products and faced out policies. As consequence of these restrictions on ozone depleting substances, the ozone layer should start to recover in the 21st century. In order to study the evolution of the Antarctic ozone depletion, we analyzed the ozone hole area and mass deficit and seasonal total ozone column (TOC) minimum. We also performed a seasonal and bi-monthly analysis for TOC time series (1979-2012), at twenty Antarctic and Sub-Antarctic stations. The number of days inside the vortex (TOC below 220DU) per season (September-December) and for September-October and November-December were analyzed, fitting the time series with a second degree polynomial According to this study, ozone hole area would have peaked between 2001 and 2002 (R=0.91, p