![The Ozone Layer: A Hole New World [Video]](https://i.headtopics.com/images/2023/3/28/scitechdaily1/the-ozone-layer-a-hole-new-world-video-the-ozone-layer-a-hole-new-world-video-1640772695670267905.webp)
In the 1980s, scientists discovered a gaping hole in Earth's ozone layer, caused by humanmade chemicals. But thanks to the historical Montreal Protocol, the world came together to take bold action to save our planet. Decades later, we can see the steady recovery of the ozone hole. How did we do it?
So, what caused the ozone hole in the first place?
They realized that the seasonal loss was getting worse each year. Shortly after, the Montreal Protocol was signed by every nation in the world. It restricts both the consumption and production of these ozone-depleting substances making it one of the most successful International agreements in history.
ESA has been monitoring the ozone for over two decades. Ozone data was provided by three key satellites: ERS-2, Envisat, and EUMETSAT’s Metop satellites. Normally from August to October, the ozone hole increases in size reaching its maximum between mid-september and mid-october. This allows people in certain areas to choose whether to stay indoors on days when ozone concentration is particularly low.
Sentinel-5P is a satellite that is looking downwards providing total ozone columns, whereas the future satellite Mission ALTIUS is looking backward scanning the atmosphere and providing a height resolved profiles of ozone. And the advantage of these profiles is that they can be used in modeling and by using this profile information you get better predictions of the ozone as compared to using total ozone columns.
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