Canadian study sees global warming for centuries | Energy & Oil | Reuters
CALGARY, Alberta, Jan 9 (Reuters) - Carbon dioxide already emitted into the atmosphere will keep contributing to global warming for centuries, eventually causing a huge Antarctic ice sheet to collapse and lift sea levels, Canadian scientists said on Sunday.Climate change to continue to year 3000 in best case scenarios
Even the complete abandonment of fossil fuels and halt to emissions cannot prevent devastating ocean warming in Antarctica as well as increasing desertification in North Africa, the research finds.
Even so, many of the negative consequences in the Northern Hemisphere, such as loss of Arctic sea ice, are reversible. That means global efforts to cut greenhouse gases are not a waste of effort and money, said Shawn Marshall, a University of Calgary geography professor and one of the study's authors.
As a result, in the next 1,000 years, the average ocean temperature around Antarctica could rise by as much as 5 degrees Celsius, triggering the collapse of the West Antarctic ice sheet, according to the study.
The elimination of the ice sheet, which covers an area about the size of Texas and is up to 4,000 meters (13,120 feet) thick, could raise sea levels by several meters.
New research indicates the impact of rising CO2 levels in the Earth's atmosphere will cause unstoppable effects to the climate for at least the next 1000 years, causing researchers to estimate a collapse of the West Antarctic ice sheet by the year 3000, and an eventual rise in the global sea level of at least four metres.