-Global warming is “unequivocal,” and since the 1950’s it’s “extremely likely” that human activities have been the dominant cause of the temperature rise. -Concentrations of carbon dioxide and other greenhouse gases in the atmosphere have increased to levels that are unprecedented in at least 800,000 years. The burning of fossil fuels is the main reason behind a 40 per cent increase in cabond-dioxide concentrations since the industrial revolution. -Global temperatures are likely to rise by 0.3 to 4.8 degrees C, or 0.5-8.6 F, by the end of the century, depending on how much governments control carbon emissions. -Most aspects of climate change will continue for many centuries even if carbon-dioxide emissions are stopped. -Sea levels are expected to rise a further 26-82 centimetres by the end of the century. -The Greenland and Antarctic ice sheets have been losing mass over the past two decades. Glaciers have continued to melt almost all over the world. Arctic sea ice has shrunk and spring snow cover has continued to decrease, and it is “very likely” that this will continue. -It’s “virtually certain” that the upper ocean has warmed from 1971 to 2010. The ocean will continue to warm this century, with heat penetrating from the surface to the deep ocean. --------------------- theglobeandmail/news/world/key-findings-of-ipcc-report-on-climate-change/article14563683/?cmpid=rss1
Posted on: Sun, 29 Sep 2013 12:11:40 +0000
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