Hole in the ozone layer in Antarctica reaches record levels in December

Hole in the ozone layer in Antarctica reaches record levels in December

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Researchers from the University of Santiago (Usach) in Chile reported today that in the first days of December the hole in the ozone layer in Antarctica reached record values ​​in its extension.

Led by doctors Raúl Cordero and Alessandro Damiani, the experts from that house concluded that the hole reached an area of ​​more than 10 million square kilometers.

This means more than double the average for these same dates, emphasized a statement from the Chilean Antarctic Institute (Inach).

The researchers calculated the hole in the ozone layer, using the values ​​recorded by satellites during the last three decades, and it was concluded that this year's hole was the fourth largest since specialized data exists, reaching 28 million kilometers in October. squares.

These data were obtained during a campaign held between November and December of this year, to the Unión Glacier, within the framework of an Antarctic Scientific expedition, organized by Inach.

In the campaign, which began this November 15, to reach the heart of Antarctica, four researchers from the University of Santiago participated, and “around 600 kilos of equipment with the best radiometric technology possible” were sent, according to the agency note.

The Unión Glaciar Joint Polar Scientific Station is located at latitude 79 South, about 1000 kilometers from the south pole.

"The depletion or depletion of the ozone layer is primarily caused by the presence in the polar stratosphere of 'ozone-depleting' substances, generated by industrial activities in mid-latitudes," said the USAch expert who participated in the expedition, Raúl Lamb.

Similarly, the expert added that "the depletion or destruction of the ozone layer is more clearly manifested at high latitudes (particularly in Antarctica)."

It is in this area, during the austral spring and due to particular meteorological conditions of Antarctica, a massive destruction of stratospheric ozone occurs, which is commonly known as the ozone hole, indicates Inach.

Similarly, the experts concluded that the massive destruction of stratospheric ozone that occurs annually over the Antarctic area between September and December is favored by the coincidence during spring of very low temperatures of the Antarctic stratosphere and the Antarctic polar vortex that tends to prevent ozone from other latitudes closes the hole.

"When temperatures rise in late spring, massive ozone destruction ceases, while the weakening of the polar vortex allows ozone from other latitudes to close the hole," Cordero said.

“A better understanding of the interrelation between climate change and the ozone hole is necessary. That is the ultimate goal of our work ”, stated the scientist.

On February 4, 2006, the Chilean president, Ricardo Lagos, promulgated the Ozone Layer Protection Law, with which Chile undertook to comply with international regulations on the matter.

The legal initiative obliges Chile to progressively reduce the consumption of chloro-fluoro-carbon (CFC), methyl bromide and alones, used in refrigeration processes, aerosols and in agribusiness, and which are the main causes of the hole.

On the occasion, Lagos stressed the need for developed countries to assume atmospheric damage as the cause of the weakening of the ozone layer and the greenhouse effect.

Photo: Hole in the ozone layer in Antarctica reaches record levels in December. EFE F. Test

EFE Green

Video: Michio Kaku - Original air date: Dec. 1991 (May 2022).