(Phys.org) —A combination of extreme cold temperatures, man-made chemicals and a stagnant atmosphere were behind what became known as the Arctic ozone hole of 2011, a new NASA study finds.
Earth Sciences
Mar 11, 2013
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There is good news and better news about ground-level ozone in American cities. While dangerous ozone levels have fallen in places that clamp down on emissions from vehicles and industry, a new study from Rice University ...
Environment
Mar 11, 2013
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Concern is growing about finding alternatives to fossil fuels, but the negative impact of one of these—biofuels—may be greater than we first thought, say scientists.
Environment
Feb 5, 2013
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(PhysOrg.com) -- Drastic reductions in Arctic sea ice in the last decade may be intensifying the chemical release of bromine into the atmosphere, resulting in ground-level ozone depletion and the deposit of toxic mercury ...
Earth Sciences
Mar 2, 2012
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Smog and soot levels have dropped significantly in Southern California over the last decade, but the Los Angeles region still has the highest levels of ozone nationwide, violating federal health standards an average of 137 ...
Environment
Apr 28, 2011
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Early Earth lacked an ozone layer to act as a shield against high-energy solar radiation, but microbes flourished by adapting to or finding other forms of protection from the higher ultraviolet radiation levels. Now researchers ...
Space Exploration
Mar 24, 2011
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Kudzu, an invasive vine that is spreading across the southeastern United States and northward, is a major contributor to large-scale increases of the pollutant surface ozone, according to a study published the week of May ...
Earth Sciences
May 17, 2010
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The increased frequency and intensity of oxygen-deprived "dead zones" along the world's coasts can negatively impact environmental conditions in far more than just local waters. In the March 12 edition of the journal Science, ...
Environment
Mar 11, 2010
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Increasing greenhouse gases could delay, or even postpone indefinitely the recovery of stratospheric ozone in some regions of the Earth, a new study suggests. This change might take a toll on public health.
Earth Sciences
Feb 4, 2009
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The hole in the Antarctic ozone layer has been getting deeper in mid-spring over the last two decades, despite a global ban on chemicals that deplete Earth's shield from deadly solar radiation, new research suggested Tuesday.
Environment
Nov 25, 2023
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