White House Report Highlights Climate Change Impacts

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Harmful effects from global warming are already here and worsening, warns the first climate report from Barack Obama’s presidency in the strongest language on climate change ever to come out of the White House. Global warming has already caused more heavy downpours, the rise of temperatures and sea levels, rapidly retreating glaciers and altered river flows, according to the document released Tuesday by the White House science adviser and other top officials.

“There are in some cases already serious consequences,” report co-author Anthony Janetos of the University of Maryland told The Associated Press. “This is not a theoretical thing that will happen 50 years from now. Things are happening now.”

The White House document — a climate status report required periodically by Congress — contains no new research. But it paints a fuller, more cohesive and darker picture of global warming in the United States than previous studies and brief updates during the George W. Bush years. Bush was ultimately forced to issue a draft report last year by a lawsuit, and that document was the basis for this new one.

“This report provides the concrete scientific information that says unequivocally that climate change is happening now and it’s happening in our own backyards and it affects the kind of things people care about,” Lubchenco said at a White House briefing. Her agency, the National Oceanic and Atmospheric Administration, was among the key contributors to the document.

The “major disruptions” already taking place will only increase as warming continues, the authors wrote. They project the average U.S. temperature could rise by as much as 11 degrees by the end of the century.

“Thresholds will be crossed, leading to large changes in climate and ecosystems,” the study said in one of its key findings, adding that it could affect the survival of some species.

For example in the past few decades, winters in parts of the Midwest have warmed by several degrees and the time without frost has grown by a week, according to the report.

Shorter winters have some benefits, such as longer growing seasons, but those are changes that require adjustments just the same, the authors note.

“Water permeates this document,” Burkett said. She said the U.S. Southwest will get drier and hotter and that will be a crucial issue.

Credit to the Associated Press.