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2019 Ozone Hole

Antarctic Situation at 2019 August 12 British Antarctic Survey

Antarctic ozone today:  The 2019 polar vortex began to form in May and has reached some 29 million square kilometres in area near the base of the ozone layer; this is around the smallest it has been at this date over the last decade.  It is larger higher up.  The growing polar vortex is offset from the Pole towards the Antarctic Peninsula.  Ozone depletion is increasing, with lowest amounts below 200 DU over the base of the Antarctic Peninsula.  Ozone amounts are building over the southern ocean  and here amounts are higher, over 400 DU in places.  Temperatures in the ozone layer are nearing the long winter minimum and are below the  -78°C Polar Stratospheric Cloud (PSC) formation threshold through much of the ozone layer, though the highest part has in places warmed above the threshold.  The area potentially with clouds now covers 24 million square kilometres, close to the average for the date over the last decade.  It is down from a peak of 26 million square kilometres in mid July.   Overall the stratosphere is much less stable than usual, which is giving rise to the small size of the vortex.  Stratospheric temperatures are highest over mid latitudes and decline towards the equator and the pole. They are generally close to the average throughout the ozone layer.  Ozone depletion is expected to increase over West Antarctica and the Antarctic Peninsula over the coming 10 days.



Antarctic Situation at 2019 July 26 British Antarctic Survey

Antarctic ozone today:  The 2019 polar vortex began to form in May and has reached some 25 million square kilometres in area near the base of the ozone layer, and is larger higher up; this is smaller than the average over the last decade.  The growing polar vortex is roughly centred on the pole.  Lowest ozone values, around 220 DU, are over the base of the Antarctic Peninsula.  Ozone amounts are building over the southern ocean  and here amounts are higher, over 400 DU in places.  Temperatures in the ozone layer are nearing the long winter minimum and have reached the  -78°C Polar Stratospheric Cloud (PSC) formation threshold through much of the ozone layer.  The area potentially with clouds now covers 24 million square kilometres, close to the mean over the last decade.  Stratospheric temperatures are highest over mid latitudes and decline towards the equator and the pole. They are generally a little below average throughout the ozone layer. 




NASA Ozone Watch

Antarctic Situation at 2019 July 5 British Antarctic Survey

Antarctic ozone today:  The 2019 polar vortex began to form in May and has reached some 20 million square kilometres in area near the base of the ozone layer, and is larger higher up; this is smaller than over the last decade.  The temperature throughout the ozone layer is falling overall.  The growing polar vortex has moved back towards the pole, having been unusually offset towards the Indian Ocean and centred over East Antarctica at the time of the solstice.  Lowest ozone values, around 210 DU, are over the base of the Antarctic Peninsula and Rothera experienced its first day of ozone hole values on July 2.  Ozone amounts are building over the southern ocean  and here amounts are higher, up to 370 DU in places.  Temperatures in the ozone layer are nearing the long winter minimum and have reached the  -78°C Polar Stratospheric Cloud (PSC) formation threshold through much of the ozone layer.  The area potentially with clouds now covers 22 million square kilometres, close to the mean over the last decade.  Stratospheric temperatures are highest over mid latitudes and decline towards the equator and the pole.  In the lower stratosphere they are not far from the normal, though are below the normal in the upper part of the ozone layer. 


Environment Canada



Ozone Hole July 2019

Ozone Hole August 2019