by Emily Chung - CBC News - October 3, 2011

Left: Ozone in Earth's stratosphere at an altitude of approximately 12 miles (20 kilometers) in mid-March 2011, near the peak of the 2011 Arctic ozone loss. Right: chlorine monoxide – the primary agent of chemical ozone destruction in the cold polar lower stratosphere – for the same day and altitude. Image credit: NASA/JPL-Caltech

Environment Canada cuts could disable future Canadian measurements

Unusual winter weather in the atmosphere high above the Earth's surface caused an "unprecedented" loss of protective ozone over the Arctic this year, scientists say.

The ozone layer in the stratosphere, located about 15 to 35 kilometres above the Earth's surface, protects the Earth from the sun's ultraviolet rays and harmful effects such as skin cancer. While an ozone hole has formed in the stratosphere over the Antarctic each spring since the mid 1980s, a paper published in Nature on Sunday marks the first time scientists have reported a comparable loss over the Arctic.

Time - July 1, 2011

Year by year, the evidence that the planet is getting warmer—and that humans are the main driver—keeps adding up. Today the National Oceanic and Atmospheric Administration's National Climatic Data Center (NCDC) released its State of the Climate in 2010 report, and researchers found that 2010 was tried with 2005 as the warmest year on record. (Download a PDF of the highlights here.) Not only that, the NCDC crunched past data and found that temperatures in the U.S. between 1981 and 2010 were on average half a degree warmer Farenheit than they were from 1971 to 2000.