Expertsii » Entries tagged with "ozone"

Hole In Arctic Ozone Larger Than Ever Before

The ozone layer over the Northern Hemisphere is offering less protection than ever before, the journal Nature reports in the issue published on 2 October.  Researchers discovered that the hole that developed over the Arctic this year was about two million square kilometers in size, similar to the hole that appears each spring over the Antarctic. The ozone layer was discovered in 1913.  It is located in the stratosphere, between 10 to 20 miles above the Earth’s surface, where it absorbs most of the sun’s high frequency ultraviolet light.  Holes in the ozone layer are thought to expose people below to greater levels of cancer and cataract-causing UV radiation.  Nature’s study shows that people in Norway, Greenland, and areas of northern Russia were most at risk. Most holes in the ozone layer … Read entire article »

Filed under: general-news

Dead Satellite Expected To Crash To Earth Friday 23 September

The Upper Atmosphere Research Satellite, UARS that NASA built, weighing almost 6.5 tons is heading towards Earth faster than originally expected, and pieces of it are expected to land on Friday 23 September. However, the chances of being hit by this are reported to be small, firstly because water covers so much of the Earth, secondly there are many sparsely populated areas, and thirdly, NASA has estimated the risk of any pieces hitting a person as about one in 3,200. If the number of people on the planet are taken into account, then that ratio then becomes about one in 7 billion. NASA is still adjusting estimates of when and where it is likely to land, and have now said Friday afternoon, but not in North America, as by that time … Read entire article »

Filed under: technology