U.N.: Arctic sees record ozone loss
United Nations, N.Y. (UPI) Apr 5, 2011
A United Nations weather and climate agency says ozone loss over the arctic reached record levels this spring because of ozone-depleting substances and weather.
The arctic region has suffered an ozone loss of about 40 percent from the beginning of the winter to late March, a release by the World Meteorological Organization said Tuesday.
The highest loss previously recorded was about 30 percent over the entire winter, the organization said
"The arctic stratosphere continues to be vulnerable to ozone destruction caused by ozone-depleting substances linked to human activities," organization Secretary-General Michel Jarraud said.
The record loss is despite the success of the Montreal Protocol cutting production and consumption of ozone-destroying chemicals such as chlorofluorocarbons and halons once present in refrigerators, spray cans and fire extinguishers.
"Without the Montreal Protocol, this year's ozone destruction would most likely have been worse," the meteorological group said. "The slow recovery of the ozone layer is due to the fact that ozone-depleting substances stay in the atmosphere for several decades."
The depletion of the ozone layer is also due to a very cold winter in the stratosphere, the organization said, noting that even though this arctic winter was warmer than average at ground level, it was colder in the stratosphere than for a normal arctic winter.
Significant arctic ozone loss is possible in the case of a cold and stable Arctic stratospheric winter, it said.
Share This Article With Planet Earth
Beyond the Ice Age
Kodiak, Alaska (AFP) April 4, 2011
Environmental groups and fishermen are sounding the alarm over planned US Navy live-fire exercises they claim threaten marine wildlife including whales in the Gulf of Alaska. They are also angry at plans to sink a decommissioned warship in the north Pacific area, one of the most productive commercial fishing grounds in US waters, at the heart of Alaska's economy. "I know the Navy has to ... read more
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|