Ozone hole smaller in 2009 than 2008: WMO
The World Meteorological Organisation said Wednesday that the ozone hole is expected to be smaller in 2009 than a year ago.
Earth Sciences
Sep 16, 2009
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News tagged with ozone layer
Related topics:
greenhouse gases
· climate change
Global warming caused by chlorofluorocarbons, not carbon dioxide, new study says
Chlorofluorocarbons (CFCs) are to blame for global warming since the 1970s and not carbon dioxide, according to new research from the University of Waterloo published in the International Journal of Modern Physics B this ...
Earth Sciences
May 30, 2013
208
11
Exploding stars may have caused mass extinction on Earth, study shows
Imagine reading by the light of an exploded star, brighter than a full moon—it might be fun to think about, but this scene is the prelude to a disaster when the radiation devastates life as we know it. Killer cosmic rays ...
Astronomy
Aug 18, 2020
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6859
Study examines how massive 2022 eruption changed stratosphere chemistry and dynamics
When the Hunga Tonga-Hunga Ha'apai volcano erupted on January 15, 2022 in the South Pacific, it produced a shock wave felt around the world and triggered tsunamis in Tonga, Fiji, New Zealand, Japan, Chile, Peru and the United ...
Earth Sciences
Nov 20, 2023
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1271
What is the UV index? An expert explains what it means and how it's calculated
You've probably seen the UV index in the day's weather forecast, and you know it tells you when you need to cover up and wear sunscreen.
Environment
Dec 21, 2021
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32
Remote lake emissions from the Tibetan Plateau challenge global climate modeling
Earth's complex systems interact between atmospheric, terrestrial, hydrological, cryological (ice and snow) and biological processes in feedback loops. Understanding their relationships is important for modeling their future ...
Emissions of banned ozone-eating chemical somehow are rising
Something strange is happening with a now-banned chemical that eats away at Earth's protective ozone layer: Scientists say there's more of it—not less—going into the atmosphere and they don't know where it is coming from.
Environment
May 16, 2018
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1699
International ozone treaty stops changes in Southern Hemisphere winds
Chemicals that deplete Earth's protective ozone layer have also been triggering changes in Southern Hemisphere atmospheric circulation. Now, new research in Nature finds that those changes have paused and might even be reversing ...
Earth Sciences
Mar 25, 2020
16
833
30 years of healing the ozone layer
This week marks the 30th anniversary of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer. The signing of the Montreal Protocol was a landmark political event. The treaty is the first in the ...
Environment
Sep 12, 2017
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1668
Study reveals more hostile conditions on Earth as life evolved
During long portions of the past 2.4 billion years, the Earth may have been more inhospitable to life than scientists previously thought, according to new computer simulations.
Evolution
Jan 4, 2022
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843
Ozone layer
The ozone layer is a layer in Earth's atmosphere which contains relatively high concentrations of ozone (O3). This layer absorbs 93-99% of the sun's high frequency ultraviolet light, which is potentially damaging to life on earth. Over 91% of the ozone in Earth's atmosphere is present here. It is mainly located in the lower portion of the stratosphere from approximately 10 km to 50 km above Earth, though the thickness varies seasonally and geographically. The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson. Its properties were explored in detail by the British meteorologist G. M. B. Dobson, who developed a simple spectrophotometer (the Dobsonmeter) that could be used to measure stratospheric ozone from the ground. Between 1928 and 1958 Dobson established a worldwide network of ozone monitoring stations which continues to operate today. The "Dobson unit", a convenient measure of the total amount of ozone in a column overhead, is named in his honor.
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