The Montreal Gazette reports:
Environment Canada‘s most optimistic projections for climate change predict even faster warming of the atmosphere than the consensus view reached this week by an international panel assessing the latest scientific evidence.
Reached by telephone in Sweden where he contributed to the Intergovernmental Panel on Climate Change (IPCC) report, senior Environment Canada scientist Greg Flato said that even in the best-case scenarios for limiting growth of heat-trapping greenhouse gas emissions, his federal department’s computer models show average global warming of about two degrees Celsius above pre-industrial levels by 2050.
In a report released on Friday, the IPCC said it’s likely that temperatures will exceed this two-degree Celsius threshold by 2100, though not necessarily by 2050. But it anticipates some scenarios in which warming from 2081 to 2100 could be as little as 0.3 degrees Celsius, relative to the 1986 to 2005 average temperatures, or as high as a maximum of 4.8 degrees Celsius above the temperatures of the 1986 to 2005 period by 2100.