BBC: The Intergovernmental Panel on Climate Change predicted in 2007 that sea levels will rise at least 28 cm by 2100. That is a global average, and now a Dutch team is attempting to study the possible regional variations. Ocean currents and differences in the temperature and salinity of sea water are among the factors that cause mean sea level to vary by up to a meter across the oceans—those factors do not include short-term changes due to tides or winds, writes Richard Black for the BBC. So whatever the global figure for rising sea level turns out to be, there will be regional differences. According to the team’s projections, New York will see the biggest increase from the global average, with Vancouver, Tasmania, and the Maldives also experiencing above-average impacts.