In 1987 countries around the world agreed to ban ozone-munching chemicals in a landmark treaty. Scientists say what's happening is a blip, likely due to colder weather.
The Antarctic ozone hole last week peaked at a moderately large size for the third straight year — bigger than the size of North America — but experts say it's still generally shrinking despite recent blips because of high altitude cold weather.
Just looking at the maximum ozone hole size, especially in October, can be misleading, said top ozone scientist Susan Solomon of MIT. Climate change science says that heat-trapping carbon from the burning of coal, oil and natural gas makes Earth's surface warmer, but the upper stratosphere, above the heat-trapping, gets cooler, Newman said. However, the ozone hole is slightly lower than the region thought to be cooled by climate change, he said. Other scientists and research do connect cooling in the area to climate change.
It's a slow process because one of the chief ozone-munching chemicals, CFC11, can stay in the atmosphere for decades, Newman said. Studies also show that CFC11 levels going into the air were rising a few years ago with scientists suspecting factories in China.
Brasil Últimas Notícias, Brasil Manchetes
Similar News:Você também pode ler notícias semelhantes a esta que coletamos de outras fontes de notícias.
Terror Trash: Blood Diner (1987)Terror Trash: Blood Diner (1987) -- Ancient goddesses, cannibal feasts, talking mannequins and a pro wrestler name 'Jimmy Hitler' all elevate this trash classic horrormovies halloween badmovies
Consulte Mais informação »
Ozone hole grows this year, but still shrinking in generalThe Antarctic ozone hole last week peaked at a moderately large size for the third straight year—bigger than the size of North America—but experts say it's still generally shrinking despite recent blips because of high altitude cold weather.
Consulte Mais informação »
Ozone hole grows this year, but still shrinking in generalThe ozone hole over Antarctica got bigger this year, which is unusual
Consulte Mais informação »
Study Shows Dad’s Brain Changes After Baby Is BornRead more about a new study that suggests a man’s brain is remodeled after the arrival of baby—shrinking in some ways and growing in others to be more empathetic.
Consulte Mais informação »