The ozone hole shrank to record-low numbers

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2019-10-27 19:40:06

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The ozone hole shrank to record-low numbers

Ozone layer

As the portal , the ozone hole over Antarctica, where harmful ultraviolet rays of our star burst through the stratosphere, was first reduced to the smallest dimensions, was 1985. Why so happened and how it can affect Earth's climate?

Why the ozone hole has decreased in size?

The Ozone layer of our planet, located about 40 kilometers from the surface of the Earth, is a real Savior of all life in our world. Despite the fact that the concentration of the ozone layer in the planet's atmosphere is extremely low, even this amount of ozone is enough to protection from harmful solar radiation. By and large, the ozone layer is relatively homogeneous in the planet's atmosphere, unless you count the giant hole over Antarctica, which was discovered in 1985. For a long time this hole in the ozone layer occupied a territory similar to the territory of Russia and took about 20 million square kilometers. When the temperature over Antarctica begins to warm, the polar clouds in the stratosphere dissipate, which increases the average temperature over the icy continent, preventing the development of chemical reactions that destroy ozone. In 2019, the hole in the ozone layer of the planet has reached its lowest level in recorded history, reaching the lowest levels since the mid 1980-ies.

Thickness of the ozone layer over Antarctica as of October 4, 2019

The Most dangerous for the ozone gaseous chlorine comes from chlorofluorocarbons (CFCs), actively emitted into the atmosphere by most of the developed countries. According to ecologists, certain types of dangerous CFCs can remain in the atmosphere for over 100 years. However, if the temperature rise on the planet saves the ozone layer, whether this be due to the fact that greenhouse gases help the Earth to maintain all of their biodiversity?

Well, not quite. Researchers believe that the high concentration of carbon dioxide in the atmosphere causes the opposite effect in the stratosphere and the troposphere of our planet, forcing them to first absorb and then actively emit all the accumulated heat into space, causing global cooling of the upper atmosphere. In other words, to defeat the emergence and expansion of ozone holes in the Earth's atmosphere is possible only with a significant limitation of emissions of chlorofluorocarbons as a result of anthropogenic human influence.

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