The research by the US universities of Harvard and Princeton was released in the journal Nature as the world's nations met in Denmark to forge a strategy to head off harmful effects of global warming blamed on greenhouse gases.
To understand the potential effects of a rise in temperature, the researchers reexamined data about the last interglacial stage -- a warmer period within an ice age -- which climaxed about 125,000 years ago, they said.
At the time, polar temperatures were 3-5 degrees C higher than today, providing a comparison for current scenarios of future rises of 1-2 degrees C, they said.
"We find a 95 percent probability that global sea level peaked at least 6.6 metres (nearly 22 feet) higher than today during the last interglacial," the study said.
Labels: CLIMATE CHANGE