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Latest Ozone depletion Stories

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2010-04-08 10:52:01

NASA has successfully completed the first science flight of the Global Hawk unpiloted aircraft system over the Pacific Ocean. The flight was the first of five scheduled for this month's Global Hawk Pacific, or GloPac, mission to study atmospheric science over the Pacific and Arctic oceans. The Global Hawk is a robotic plane that can fly autonomously to altitudes above 60,000 feet -- roughly twice as high as a commercial airliner -- and as far as 11,000 nautical miles, which is half the...

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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...

2010-03-09 09:19:00

SUNBURY, Pa., March 9 /PRNewswire/ -- A Weis Markets' store in Hanover, Pa., has achieved an environmental milestone worthy of federal recognition. Weis Markets' Carlisle Street store in Hanover is the first supermarket in the state of Pennsylvania to earn a certification award from the GreenChill Advanced Refrigeration Partnership, a voluntary Environmental Protection Agency alliance with food retailers to reduce refrigerant emissions and decrease their impact on the ozone layer and...

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2010-03-03 11:14:50

Chemicals that helped solve a global environmental crisis in the 1990s "” the hole in Earth's protective ozone layer "” may be making another problem "” acid rain "” worse, scientists are reporting. Their study on the chemicals that replaced the ozone-destroying chlorofluorocarbons (CFCs) once used in aerosol spray cans, air conditioners, refrigerators, and other products, appears in ACS' Journal of Physical Chemistry A, a weekly publication. Jeffrey Gaffney, Carrie J....

2010-02-22 12:13:00

WASHINGTON, Feb. 22 /PRNewswire-USNewswire/ -- The Alliance for Responsible Atmospheric Policy (Alliance), an industry coalition, today commended the sentencing of a Florida man and a Florida corporation on charges related to smuggling 418,654 kilograms of hydrochlorofluorocarbon-22 (HCFC) refrigerants with a market value of over $3.9 million. James Garrido was sentenced to 30 months imprisonment and Kroy Corporation was sentenced to five years of probation. They must jointly pay $40,000...

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2010-01-26 08:05:00

The hole in the ozone layer is now steadily closing, but its repair could actually increase warming in the southern hemisphere, according to scientists at the University of Leeds. The Antarctic ozone hole was once regarded as one of the biggest environmental threats, but the discovery of a previously undiscovered feedback shows that it has instead helped to shield this region from carbon-induced warming over the past two decades. High-speed winds in the area beneath the hole have led to the...

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2010-01-21 07:40:00

Pollution from Asia is causing ozone levels to rise above the western United States, an increase that could make it more difficult for the U.S. to meet Clean Air Act standards for ozone pollution at ground level, according to an international study published on Wednesday. The study, published in the journal Nature, analyzed large sets of ozone data captured since 1984. It focused primarily on data for ozone in springtime above western North America at an altitude of between two and five...

2010-01-19 18:01:27

Researchers in Freiburg have developed a highly-sensitive, miniaturized mobile ozone sensor which can be used not only in air, but also in water and in the vicinity of explosive gases. The Fraunhofer Institute for Applied Solid State Physics IAF in Freiburg is developing improved chemical sensors that are not prohibitively expensive. One particularly important area of application involves the regular measurement of ozone content in air and other media. This gas is a powerful oxidizing agent...

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2009-12-07 14:41:57

There is more to the snowflake than its ability to delight schoolchildren and snarl traffic. The structure of the frosty flakes also fascinate ice chemists like Purdue University's Travis Knepp, a doctoral candidate in analytical chemistry who studies the basics of snowflake structure to gain more insight into the dynamics of ground-level, or "tropospheric," ozone depletion in the Arctic. "A lot of chemistry occurs on ice surfaces," Knepp said. "By better understanding the physical structure...

2009-12-03 19:21:32

Marco Tedesco Says Record Low Resulted From Simultaneous Positive Phases for Two Climate Drivers The 30-year record low in Antarctic snowmelt that occurred during the 2008-09 austral summer was likely due to concurrent strong positive phases for two main climate drivers, ENSO (El Niño - Southern Oscillation) and SAM (Southern Hemisphere Annular Mode), according to Dr. Marco Tedesco, Assistant Professor of Earth & Atmospheric Sciences at The City College of New...


Word of the Day
baudekin
  • A rich embroidered or brocaded silk fabric woven originally with a warp of gold thread.
'Baudekin' seems to be an alternative form of 'baldachin,' from the Italian 'Baldacco,' Baghdad, the city where the material was made.
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