The ozonlayer above the Artics is about 30 percent smaller this year then the record size of last year. According to measurements of the ESA satellite 'Envisat' the shortage of ozon is 27,7 million tons this year. Last year this was 40 million tons.
The KNMI reported this on their website. The ozon shortage is determined by calculations of the surface and the depth of the hole in the ozon.
Scientist claim that the smaller hole is because of natural variations in temperature and aircurrents and that this is no indication for the long term.
Ronald van der A, ozon researcher at the KNMI, says that its not clear is the ozonlayer is recovering. This year the ozonlayer is less concentrated around the south-pole than other years, hence it could mix with warmer air. This reduced the growth of the hole in the layer because ozon will detoriate at temperatures below -78 degrees Celsius.
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The ozonlayer above the Artics is about 30 percent smaller this year then the record size of last year. According to measurements of the ESA satellite 'Envisat' the shortage of ozon is 27,7 million tons this year. Last year this was 40 million tons.
