(3BL Media/Justmeans) - Back in April, James Hansen described some newly discovered causes for concern about global warming impacts including the rapid disintegration of Antarctic ice sheets, and an ocean circulation pattern around the poles. Now, after further analysis, he and a team of 16 other scientists have issued a draft of a new report that ratchets up the level of concern and the need for urgent action. (It should be noted that the report has not yet been peer-reviewed.)
The report claims that the two-degree Celsius increase in temperature that has come to represent the accepted goal from emission reduction efforts, may not be good enough. It could lead to conditions that Hansen calls, “highly dangerous.”
Why? While previous studies assumed an orderly linear rate of disintegration of polar ice sheets, which directly drive sea level rise, newly recognized trends point to a more alarming picture.
According to the report, “If the ocean continues to accumulate heat and increase melting of marine-terminating ice shelves of Antarctica and Greenland, a point will be reached at which it is impossible to avoid large scale ice sheet disintegration with sea level rise of at least several meters.”