The Latest Scientific Report on Climate Change

 

The Intergovernmental Panel on Climate Change has just issued its Fifth Assessment Report summarizing the best scientific information about global warming that is available in 2014.
Capture1CaptureKey findings are:

  • It is extremely likely that humans are the dominant cause of warming since the mid-20th century.
  • Each of the past three decades has been successively warmer than the preceding decades since 1850.
  • Oceans absorb more than 90% of the heat.
  • Land temperatures remain at historic highs while ocean temperatures continue to climb.
  • Oceans will continue to warm during the 21st century.
  • Global mean sea level will continue to rise during the 21st century.
  • It is very likely that the Artic sea ice cover will continue to shrink and thin as global mean surface temperature rises.
  • Some of the changes in extreme weather and climate events observed since about 1950 have been linked to human influence.
  • The globally averaged temperature shows a warming of .85 degrees centigrade over the period 1880 – 2012. And 65% of the carbon budget compatible with limiting future temperature to an overall 2 degrees C increase has already been used.
  • Energy production remains the primary driver of greenhouse gas emissions.
  • Measures exist to achieve the substantial emissions reductions required to limit likely warming to 2 degrees C.
  • Delaying mitigation will substantially increase the challenges associated with limiting warming to 2 degrees C.

I consider the above information from the IPCC report to be noncontroversial and providing overwhelmingly strong evidence that global warming is taking place. Next question:  What do we do about it?  This will be the subject of my next post!

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