Strong ozone depletion in the cold polar vortex above the Arctic on 2 April 2011. Many of the processes that cause ozone depletion in the polar stratosphere strongly depend on temperature. This explains why climate change also affects the ozone layer. The image on the left shows the ozone layer. The purple area is where the layer is thinnest. The image on the right shows the temperature. The purple area indicates the coldest region. Source: Forschungszentrum Jülich/Marc von Hobe Ozone data: Ozone Monitoring Instrument Temperature data: European Centre for Medium-Range Weather Forecasts (ECMWF). © Forschungszentrum Jülich/ Marc von Hobe
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