A rise of at least two meters in the world’s sea levels is now almost unstoppable, experts told a climate conference at Oxford University.
“The crux of the sea level issue is that it starts very slowly but once it gets going it is practically unstoppable,” said Stefan Rahmstorf, a scientist at Germany’s Potsdam Institute and a widely recognized sea level expert. “There is no way I can see to stop this rise, even if we have gone to zero emissions.”
Rahmstorf said the best outcome was that after temperatures stabilized, sea levels would only rise at a steady rate “for centuries to come,” and not accelerate…
His best guess was a one meter rise this century, assuming three degrees warming, and up to five meters over the next 300 years…
Speakers in Oxford used history to back up their arguments on rising seas. Three million years ago the planet was 2-3 degrees warmer and the sea 25-35 meters higher, and 122,000 years ago 2 degrees warmer and 10 meters higher, they said.
“What we now see in Greenland, Antarctica could be a temporary phenomena but it could also be the start of what we saw 122,000 years ago,” said Vellinga…
About 40 million people worldwide live in flood plains, said Southampton University’s Robert Nicholls. That is 0.6 percent of the global population and 5 percent of global wealth, because of valuable assets such as airports and power plants.
The airports and power plants are assets more important to American politicians than, say, healthy or educated citizens.