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Last updated on April 19, 2014 at 21:20 EDT

Latest Scientific Assessment of Ozone Depletion Stories

2011-04-21 22:59:47

First time that ozone depletion is shown to impact the entire circulation of the southern hemisphere In a study to be published in the April 21st issue of Science magazine, researchers at Columbia University's School of Engineering and Applied Science report their findings that the ozone hole, which is located over the South Pole, has affected the entire circulation of the Southern Hemisphere all the way to the equator. While previous work has shown that the ozone hole is changing the...

2011-04-05 15:46:11

Over the past few days ozone-depleted air masses extended from the north pole to southern Scandinavia leading to higher than normal levels of ultraviolet (UV) radiation during sunny days in southern Finland. These air masses will move east over the next few days, covering parts of Russia and perhaps extend as far south as the Chinese/Russian border. Such excursions of ozone-depleted air may also occur over Central Europe and could reach as far south as the Mediterranean. On an international...

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2011-04-05 11:05:00

In the spring of 2011, the ozone layer that protects us from harmful levels of ultraviolet rays has shown a record loss in the Arctic region, according to the U.N. weather agency. The continued presence of ozone-depleting substances in the atmosphere coupled with a very cold winter in the stratosphere is to blame. Although an international agreement from 1987 called the Montreal Protocol has successfully reduced the production and consumption of these ozone destroying chemicals, the long...

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2011-04-04 20:59:50

ESA's Envisat satellite has measured record low levels of ozone over the Euro-Atlantic sector of the northern hemisphere during March. This record low was caused by unusually strong winds, known as the polar vortex, which isolated the atmospheric mass over the North Pole and prevented it from mixing with air in the mid-latitudes.This led to very low temperatures and created conditions similar to those that occur every southern hemisphere winter over the Antarctic.  As March sunlight...

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2010-09-17 12:51:43

Scientists with the United Nations (UN) announced Thursday they found that the Earth's protective ozone layer in the upper atmosphere has stopped thinning out and should be mostly restored by the middle of this century thanks to a ban on dangerous chemicals that float up into the air. The "Scientific Assessment of Ozone Depletion 2010" report said a 1987 international treaty that prohibited further use of chlorofluorocarbons (CFC) had been overly successful. CFC was widely used in...

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2010-03-16 13:03:58

NASA scientists analyzing 30 years of satellite data have found that the amount of ultraviolet (UV) radiation reaching Earth's surface has increased markedly over the last three decades. Most of the increase has occurred in the mid-and-high latitudes, and there's been little or no increase in tropical regions. The new analysis shows, for example, that at one line of latitude "” 32.5 degrees "” a line that runs through central Texas in the northern hemisphere and the country of...

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2009-09-21 15:09:26

Scientists using European Space Agency satellite data say they've discovered the depletion of the Earth's ozone layer might be easing. We found a global slightly positive trend of ozone increase of almost 1 percent per decade in the total ozone from the last 14 years: a result that was confirmed by comparisons with ground-based measurements, said Diego Loyola, who worked on the project with colleagues from the German Aerospace Center. Ashley Jones and Jo Urban from Sweden's Chalmers...

2009-09-21 09:49:05

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 "“ and the findings look promising. Scientists merged monthly total ozone data derived from the vertically downward-looking measurements of the GOME instrument on ESA's ERS-2 satellite, SCIAMACHY on ESA's Envisat and GOME-2 on the European Meteorological Satellite Organization's...

2009-09-17 12:41:42

Canadian scientists say climate change will lead to less ultraviolet radiation in some northern areas, such as Siberia, Scandinavia and northern Canada. Physicists at the University of Toronto said they have discovered changes in the Earth's ozone layer due to climate change will reduce the amount of ultraviolet radiation in northern high latitude regions, while other areas of the Earth, such as the tropics and Antarctica, will instead face increasing levels of UV radiation. Using a...

2009-09-15 10:27:51

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 latitude regions such as Siberia, Scandinavia and northern Canada. Other regions of the Earth, such as the tropics and Antarctica, will instead face increasing levels of UV radiation. "Climate change is an established fact, but scientists are only just beginning to understand its regional manifestations,"...