Good news from NASA.
A new report published by NASA shows that This year, the ozone hole is smaller than ever before her measurements. This is an amazing achievement. However, it is not solely responsible for the fact that we have stopped using freons and other substances that cause ozone depletion.
According to NASA, the reduction of the hole size has been facilitated this year by unusual weather conditions occurring over Antarctica, i.e. where the ozone hole is located. These unusual weather conditions meant that the stratosphere in the region was extremely hot.
Usually, each year at the turn of September and October the ozone hole grows, reaching almost 21 million square kilometers of surface, and this happens because the compounds that destroy the ozone layer remain in the atmosphere for a very long time. The elevated temperature, however, meant that this hole increased to only 16.4 million square kilometers this year, after which it decreased to 3.9 million square kilometers. This temperature reduced the impact of harmful substances on the ozone layer.
"This is great news for ozone in the southern hemisphere.". said Paul Newman, chief scientist for Earth Sciences at the Robert H. Goddard Space Flight Center in Greenbelt, USA. "However, it should be noted that what we see this year results from higher temperatures in the stratosphere. This is not a sign that atmospheric ozone is suddenly on a fast path to complete regeneration. "
Of course, due to the introduced regulations, the ozone hole decreases from year to year and will reach its size from 1980, but this is only to happen after 2070. During this time, Antarctica will probably have several times high temperatures that will limit its periodic growth . In the past, such anomalies have occurred two more times.