UN IPCC (United Nations Intergovernmental Panel for Climate Change) released the 5th Assessment report on Climate change in Sep 2013. The last report (4th Assessment report) was released in 2007 (6 years ago).
In their latest report, IPCC said it was “unequivocal” that climate change was caused by human activities and that even if the world begins to moderate greenhouse gas emissions, warming is likely to cross the critical threshold of 2C by the end of this century. That would have serious consequences, including sea level rises, heat waves and changes to rainfall meaning dry regions get less and already wet areas receive more.
Some key points from the report are:
– Atmospheric concentrations of carbon dioxide, methane and nitrous oxide are now at levels “unprecedented in at least the last 800,000 years.”
– Since the 1950’s it’s “extremely likely” that human activities have been the dominant cause of the temperature rise.
– Global temperatures are likely to rise by 0.3C to 4.8C, by the end of the century depending on how much governments controlcarbon emissions.
– Sea levels are expected to rise a further 26-82cm by the end of the century.
– The oceans have acidified as they have absorbed about a third of the carbon dioxide emitted.
After the release of the report, UN secretary-general, Mr Ban Ki-Moon, remarked: “The heat is on. We must act.”
US secretary of state, John Kerry, said in a statement: “This is yet another wakeup call: those who deny the science or choose excuses over action are playing with fire.”
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IPCC climate report: human impact is ‘unequivocal’:
http://www.theguardian.com/environment/2013/sep/27/ipcc-climate-report-un-secretary-general
IPCC climate report: the digested read:
http://www.theguardian.com/environment/2013/sep/27/ipcc-climate-report-digested-read
The Full report can be found in IPCC website:
http://www.ipcc.ch/report/ar5/wg1/#.UkdnAdLGyr3
An Executive Summary (36 pages) can be found below:
http://www.climatechange2013.org/images/uploads/WGIAR5-SPM_Approved27Sep2013.pdf
In the coming years, World governments and citizens would have to join hands to reduce green house gases to keep the planet within the safe 2 Degree zone to avoid large changes to the climate system.
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