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Source: The post is based on the article “WMO revives ozone-UV bulletin after 7 years, shows steady recovery of ozone layer” published in Down To Earth on 3rd July 2023
What is the News?
The World Meteorological Organization (WMO) has released Ozone and UV Bulletin after a gap of seven years.
What are the key highlights from the Ozone and UV Bulletin?
Steady recovery of ozone layer: The production and consumption of controlled ozone-depleting substances have been phased out up to 99%. This has happened due to the Montreal Protocol and its amendments.
– Stratospheric ozone is slowly recovering, with a full recovery in most parts of the atmosphere projected to occur in the coming decades.
– However, unfortunately, climate change is slowing down the recovery of the ozone layer. Ozone depletion is affecting the climate of the lower atmosphere.
Hunga Tonga-Hunga Ha’apai volcanic eruption changed the stratosphere: The Hunga Tonga-Hunga Ha’apai volcanic eruption in January 2022 was the largest in the last 100 years, injecting ice and water vapor high into the stratosphere.
– The eruption increased the water vapor content of the stratosphere by 5% to 10%, resulting in substantial cooling of the stratosphere above the Southern Hemisphere.
– The additional water vapor has resulted in less ozone in the lower stratosphere of the Southern Hemisphere in 2022.
