Researchers at Columbia Universitys School of Engineering and Applied Science have reported that the ozone hole has affected circulation around the entire Southern Hemisphere, all the way to the equator.
The hole, currently located over the South Pole, has always been under scrutiny. Previous work has found that it is changing atmospheric flow in high latitudes. However, the new research shows that it is influencing circulation from the tropical regions, and therefore, increasing rainfall at low latitudes in the Southern Hemisphere.
The paper, recently published in the April 21st issue of Science, outlines that this it he first time that ozone depletion has been linked to climate change from the South Pole all the way to the equator.
Previous reports did not even mention the ozone hole. This study, on the other hand, shows its large impact; a huge player in climate change. Like a domino effect, it is causing havoc in spite f being so far away.
This study is showing now that it is proving to be a dominant source of the circulation changes. As well, carbon isnt the only problem.
The ozone layer absorbs most of the suns ultraviolet rays, created mostly from chlorofluorocarbons (CFCs) breaking it down. Global CFC production has since almost completely ceased; in turn, so did the depletion.
By using two different climate models to show the ozone hole effect, the team calculated the atmospheric changes in the models produced by creating an ozone hole. Next, they took both of these changes and compared them with the ones observed in the last few decades. They found the connection to the Southern Hemisphere.
This study was funded by a grant from the National Science Foundation to Columbia University.