Draft “Climate Science Special Report” By Scientists And Researchers From 13 Federal Agencies And Several Academic Institutions Notes Greater Than 95% Certainty That “Human Influence” Is Dominant Cause Of Accelerated Global Temperature Rise

 In Environment   Last Updated: August 26, 2017

A draft climate report developed by scientists and researchers from 13 Federal agencies as well as a variety of academic and research institutions has concluded that “it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century.”  “Extremely likely” is defined in the report as 95-100% certainty.

The National Academy of Sciences has signed off on the report, and the authors are awaiting permission from the Trump administration to release it.”

The report predicts temperature rises by 5.0 to 7.5 degrees Fahrenheit by the end of the century, depending on changes to carbon emissions.

The report notes that “surface, air and ground temperatures in Alaska and the Arctic are rising at a frighteningly fast rate – twice as fast as the global average.”

 

 

CO2 levels in the air have risen dramatically since the late 19th century, from below 300 ppm (parts per million) to well over 400 ppm.  The largest increases have occurred over the last 70 years.

2016 average global surface temperatures were the warmest since modern record keeping began in 1880, with 16 of the 17 warmest years on record occurring since 2001.

The Trump administration has decided to withdraw from the Paris Accords, an alliance that includes all but 3 countries (including the United States) and seeks to reduce global temperature rise.

 

 

Various. "Climate Science Special Report (CSSR)." U.S. Global Change Research Program. U.S. Global Change Research Program, 28 June 2017. Web. 26 August 2017.
Lisa Friedman. "Scientists Fear Trump Will Dismiss Blunt Climate Report." New York Times, 07 August 2017. Web. 26 August 2017.
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