New Climate Change Report
Posted by Mary Catherine Dunphy (+2543) 10 months ago
"Government scientists agree that, contrary to President Donald Trump and his team’s repeated claims, climate change is already having a dramatic effect in the U.S., according to a new report.

The New York Times published an unreleased draft of the report Monday. The 543-page report was written by scientists from 13 federal agencies, including the Environmental Protection Agency and the National Oceanic and Atmospheric Administration. It concludes that temperatures in the U.S. have risen sharply, by 1.6 degrees Fahrenheit, over the last 150 years and that it is 'extremely likely that most of the global mean temperature increase since 1951 was caused by human influence on climate.'

'Evidence for a changing climate abounds, from the top of the atmosphere to the depths of the oceans,' the report states. 'Thousands of studies conducted by tens of thousands of scientists around the world have documented changes in surface, atmospheric, and oceanic temperatures; melting glaciers; disappearing snow cover; shrinking sea ice; rising sea level; and an increase in atmospheric water vapor. Many lines of evidence demonstrate that human activities, especially emissions of greenhouse (heat-trapping) gases, are primarily responsible for recent observed climate changes.'

The report, completed this year and part of the National Climate Assessment, has already been approved by the National Academy of Sciences, according to the Times. Its release hinges on the Trump administration’s approval, and one scientist who worked on the report told the Times that he and others feared the president would withhold it.

The report also finds that the average annual temperature will continue to rise throughout the century. Even if humans ceased burning fossil fuels altogether, global temperatures would climb another half a degree Fahrenheit (0.30 degrees Celsius) over this century.

With 'very high confidence,' the scientists concluded that 'the magnitude of climate change beyond the next few decades depends primarily on the additional amount of greenhouse gases emitted globally.'

Also, the frequency of extreme weather events, including heavy rain and heat waves, has increased and is very likely to continue to do so. And since 1880, global sea levels have risen 8 to 9 inches — roughly 3 of those inches since 1990 — with human activity playing a substantial role, according to the report."

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Posted by Mary Catherine Dunphy (+2543) 10 months ago
"This is how bad things could get if Trump denies the reality of climate change," Washington Post, August 9, 2017.