In particular, at higher latitudes in September or October, because of special atmospheric effects, the rate of ozone loss is even more jolting. For example, in the air over Canada and Northern Europe, the proportion of the ozone layer destroyed is estimated to be up to 25 %, while it is about 10 % over England and Germany.
尤其高緯度地區在九、十月間，會因特殊的大氣作用，使臭氧的流失速度更為驚人，例如加拿大、北歐國家上空，臭氧層破壞比率估計高達百分之廿五，英國、德國等地也在百分之十左右。