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Boletin 1 Temporada del Agujero de Ozono

Abstract

The purpose of this bulletin is to provide an update on the evolution of the Ozone Hole over Antarctica for the year 2024. The minimum and zonal stratospheric temperatures (50 – 90°S) are high due to a sudden stratospheric warming, resulting in fewer Polar Stratospheric Clouds being produced and a late formation of the ozone hole. This is because there are low levels of ozone-destroying compounds in its reservoirs. The sudden stratospheric warming is caused by a significant wave activity that transports a large amount of heat from the troposphere. The measurement systems confirm the minimum ozone values in the stratosphere and the ozonesondes show the stratospheric warming over the VAG-Ushuaia station, even indicating cooling when the elongation of the polar vortex passes over southern Patagonia. The high stratospheric temperature leads to the polar vortex entering a negative phase and becoming very unstable. This situation is very favorable for the size of the ozone hole, which currently measures 12.73 million km2. The unfavorable context and shallow depth so far indicate a limited development of the ozone hole.