"It was uploaded to a nonprofit internet digital library in January but received little attention until it was published by The New York Times", the corrected NYT article reads. For example, the impact of El Nino on the climate is completely downplayed and misconstrued to conflict with historical reports. They explain that "There are no convincing alternative explanations supported by the extent of the observational evidence".
The EPA and other agencies must sign off on the report, which, if released, would be part of the quadrennial National Climate Assessment. He declined to comment Tuesday, as the report has yet to be publicly released.
Scientists familiar with both drafts said there was no substantive difference between them.
But the report is just as significant for the fact that despite being compiled by scientists from across the U.S. government, it had to be leaked for fear that it could be stifled by the White House. The actual projected rise is as much as 2°C (3.6°F).
As for the Paris Climate Accord, 196 different countries agreed to adopt green energy sources, cut down on emissions and limit the spike in global temperatures. AP FILE PHOTO climate: The difference between a rise in global temperatures of 34.7 degrees and one of 35.6 degrees Fahrenheit, for example, could mean longer heat waves, more intense rainstorms and the faster disintegration of coral reefs.
It cites "many lines of evidence" from thousands of peer-reviewed studies documenting climate changes on land and in the air. However, this field of "attribution science" is complex.
The United States just announced Friday it would still take part in worldwide climate change negotiations in order to protect its interests, despite its planned withdrawal from the Paris accord on global warming.
"It's a fraught situation", said Michael Oppenheimer, a professor of geoscience and global affairs at Princeton University who was not involved in the study.More news: Kenya opposition leader urges large turnout ahead of elections
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President Donald Trump and his administration have voiced opposition to the findings that climate change is caused by human activity.
Sources involved in drafting a government climate change assessment said there is no evidence the White House plans to suppress its findings despite claims to the contrary made in a Monday New York Times report.
That's a jump beyond what senior officials in the Trump administration have said.
And so the leak to the paper of record has become something of an insurance policy: if the administration suppresses the report, we'll know.
"Choices made today will determine the magnitude of climate change risks beyond the next few decades", according to the report, which warns of "unanticipated changes" throughout the next century. Still, it notes, crucial uncertainties remain.
The report all but erases doubt that climate change is the result of human activity, with the range of human contribution to global average temperature increases placed at between 1.1 to 1.2 degrees Fahrenheit between 1951 and 2010.
"It is very likely that the accelerated rate of Arctic warming will have a significant effect for the United States due to accelerating land and sea ice that is driving changes in the ocean including sea level rise threatening our coastal communities", the report concluded.