Ozone layer
hideThe 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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News tagged with ozone layer
A bubbling ball of gas (w/ Video)
Space & Earth / Space Exploration
Nov 11, 2009 |
4.9 / 5 (18) |
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The Sun is a bubbling mass. Packages of gas rise and sink, lending the sun its grainy surface structure, its granulation. Dark spots appear and disappear, clouds of matter dart up - and behind the whole thing ...
Ozone layer depletion leveling off
Space & Earth / Earth Sciences
Sep 21, 2009 |
3.7 / 5 (3) |
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By merging more than a decade of atmospheric data from European satellites, scientists have compiled a homogeneous long-term ozone record that allows them to monitor total ozone trends on a global scale - ...
Portable and precise gas sensor could monitor pollution and detect disease
Sep 18, 2009 |
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In the air, it is a serious pollutant. In the body, it plays a role in heart rate, blood flow, nerve signals and immune function. Nitric oxide, a gas well known to scientists for its myriad functions, has ...
Ozone hole smaller in 2009 than 2008: WMO
Space & Earth / Earth Sciences
Sep 16, 2009 |
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The World Meteorological Organisation said Wednesday that the ozone hole is expected to be smaller in 2009 than a year ago.
North America backs plan to cut greenhouse gases
Sep 16, 2009 |
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(AP) -- Small island nations gained North America's powerful backing Tuesday for a plan to convert the U.N. ozone treaty into a tool for phasing out some of the globe's most powerful climate-warming gases.
Ozone: Climate change boosts ultraviolet risk for high latitudes
Space & Earth / Earth Sciences
Sep 06, 2009 |
2.2 / 5 (13) |
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(PhysOrg.com) -- Physicists at the University of Toronto have discovered that changes in the Earth's ozone layer due to climate change will reduce the amount of ultraviolet (UV) radiation in northern high ...
What's Holding Antarctic Sea Ice Back From Melting?
Space & Earth / Earth Sciences
Sep 02, 2009 |
3.1 / 5 (9) |
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(PhysOrg.com) -- Global temperatures are increasing. Sea levels are rising. Ice sheets in many areas of the world are retreating. Yet there’s something peculiar going on in the oceans around Antarctica: even ...
New study shows nitrous oxide now top ozone-depleting emission
Space & Earth / Earth Sciences
Aug 27, 2009 |
5 / 5 (6) |
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Nitrous oxide has now become the largest ozone-depleting substance emitted through human activities, and is expected to remain the largest throughout the 21st century, NOAA scientists say in a new study.
Aura Marks Five Years of Sky-High Atmosphere Research
Space & Earth / Earth Sciences
Aug 05, 2009 |
4.8 / 5 (4) |
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Imagine Earth without an atmosphere - without clouds, wind or air. Earth's atmosphere protects, transports, and reacts to life on Earth.
After Five Years, NASA's Aura Shines Brightly
Space & Earth / Space Exploration
Jul 16, 2009 |
5 / 5 (2) |
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(PhysOrg.com) -- On July 15, 2004, NASA's Aura spacecraft launched from California's Vandenberg Air Force Base on a mission to study Earth's ozone layer, air quality and climate. Aura's data are helping scientists ...
Beyond CO2: Study reveals growing importance of HFCs in climate warming
Jun 22, 2009 |
3.9 / 5 (24) |
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Some of the substances that are helping to avert the destruction of the ozone layer could increasingly contribute to climate warming, according to scientists from NOAA's Earth System Research Laboratory and their colleagues ...
Global sunscreen won't save corals
Jun 16, 2009 |
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Emergency plans to counteract global warming by artificially shading the Earth from incoming sunlight might lower the planet's temperature a few degrees, but such "geoengineering" solutions would do little to stop the acidification ...
US supports reducing climate-warming gases
May 04, 2009 |
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(AP) -- The Obama administration called hydrofluorocarbons widely used in refrigerators and air conditioners "a very significant" threat to climate change Monday, and expressed a preference for drastically ...
US wants to move on climate change
Apr 30, 2009 |
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(AP) -- The Obama administration, in a major environmental policy shift, is leaning toward asking 195 nations that ratified the U.N. ozone treaty to enact mandatory reductions in hydrofluorocarbons, according ...
Climate Change and Atmospheric Circulation Will Make for Uneven Ozone Recovery
Space & Earth / Earth Sciences
Apr 10, 2009 |
4.4 / 5 (28) |
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(PhysOrg.com) -- Earth's ozone layer should eventually recover from the unintended destruction brought on by the use of chlorofluorocarbons (CFCs) and similar ozone-depleting chemicals in the 20th century. ...
