Sea levels could rise twice as much as previously projected, climate scientists warned as they presented the latest research on global warming.
A 2007 report by the Intergovernmental Panel on Climate Change predicted a sea level rise of 18 to 59 centimeters by the end of the century.
But scientists meeting yesterday in Copenhagen dismissed those estimates as too conservative, saying new data suggests that sea level rise could exceed 1 metre and is unlikely to be less than 50 centimeters.
"This means that if the emissions of greenhouse gases is not reduced quickly and substantially even the best-case scenario will hit low-lying coastal areas housing one-tenth of humans on the planet hard," organisers said in a statement at the three-day congress hosted by the University of Copenhagen.
The melting of polar ice sheets and of glaciers are two big factors that will affect sea levels, they added.
"Unless we undertake urgent and significant mitigation actions, the climate could cross a threshold during the 21st century committing the world to a sea level rise of meters," said John Church of the Centre for Australian Weather and Climate Research.
The conclusions of the conference will be presented to politicians meeting in Copenhagen in December to discuss a new global agreement on greenhouse gas emissions to replace the Kyoto Protocol, which expires in 2012.
