Discover the mysterious existence of ozone-killing 'environment'

The Earth's ozone layer is not as safe as we thought. The US Aeronautics and Space Agency (NASA) has discovered that carbon tetrachloride (CCl4) , an ozone-depleting agent, is still being released into the atmosphere from an unspecified origin.

>>>The hole in the ozone layer in Antarctica is shrinking

According to the latest NASA statement published on August 20 in "Geophysical Research Letters," countries participating in the Montreal Protocol on ozone depleting substances all reported CC14 emissions at zero in the 2007 period. -2012. However, the latest research shows that the current global CC14 emissions level is 39 kiloton / year, equivalent to about 30% of the maximum level of the period before the implementation of international treaties on reductions. emissions cause damage to the crust protecting the Earth.

The ozone layer

With a CC14 level of zero as reported, the concentration of this compound in the atmosphere will have to decrease at a rate of 4% per year since 2007. However, observations from the ground show the number This is in fact only 1% / year.

The current level of CC14 is not sufficient to reverse and increase the threat to the ozone layer, but it is worrisome that experts cannot yet clarify the source of emissions . Paul Newman, NASA's head of atmospheric research, said the world believes the Montreal Protocol has helped stop the release of atmospheric ozone-depleting chemicals. However, the latest research has shown that there is still a large source of CC14 emissions in the world that science is unknown.

Experts used the GEOS 3-D Chemical Climate Model in conjunction with data from the global ground-observation network to make first estimates of the global average CC14 emission level during the period. 2000-2012 period. The analysis also shows that this chemical stays in the atmosphere 40% longer than previously assumed.

CC14 is a refrigerant that is widely used in dry cleaning and fire extinguishers. This medium affects ozone depletion and global climate change. The world agreed to stop using CC14 as part of its commitment to the Montreal Protocol, a Vienna Convention on the protection of the ozone layer.