The thinning of the ozone layer has changed ocean circulation

February 5, 2013. According to scientist J. Hopkins, a hole in the ozone layer over Antarctica is caused by changes in circulation waters the southern oceans. According to Hopkins, this phenomenon has the potential to change the amount of CO2 in the atmosphere and, ultimately, have an impact on the global change climate.

The study found out that the middle layer of water in the southern part of the subtropical oceans become "younger" as rising circumpolar waters were "older." Such features layers of water purchased with increased surface winds, which affect the strength of the thinning the ozone layer. A southern oceans play an important role in the uptake of heat and carbon dioxide, and any changes resulting from these waters, one way or another, changing the world's climate.

Scientists have studied the waters of the southern subtropics since the early 1990s to the late 2000s. for the presence of the chemical agent CFC-12 (chloro-fluoro-carbon-12). It is this substance observed in the 20th century after increasing the concentration of mass industrial use exactly to the point where it banned under the Montreal Protocol, since it represents a threat to the integrity of the Ozone layer.

Using data about the concentration of CFC-12 in the water, the scientists were able to determine how fast the mixing of the surface layers waters in the southern oceans. They knew that the more dangerous substances for ozone in the atmosphere, the more it was in the water. It follows that the higher concentration CFC-12 in deep-water reservoirs, the later these were in the water surface. Indeed, the water in the subtropics were younger, fresher, and at the South Pole — older that fully explains the observed intensification of surface westerly winds, which arose primarily due to the expansion of the Antarctic ozone hole and the general exhaustion Ozone layer.

Because in the next 50 years is expected to recover stratospheric the ozone layer, unusual changes in oceanic mixing waters may slow down or disappear completely. But here is it will be important to take into account long-term effects of increasing concentrations of greenhouse gases in the air as well as the ability to influence the order of movement of the layers of ocean water and the water uptake of the excess heat and carbon.


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