WASHINGTON - Climate change experts said on
Tuesday they are frustrated the U.S. government and the public
are not taking the risk of global warming seriously.
They said even as sea levels rise and crop yields fall,
officials argue over whether climate change is real and
Americans continue to drive fuel-guzzling SUVs.
"There is going to be large change," said atmospheric
scientist David Battisti of the University of Washington in
Seattle. "The risks are very large."
The group met at the American Association for the
Advancement of Science to try to drive home the message that
climate change is already under way.
"You hope that somehow people will understand that we have
got to do something now," Joyce Penner, an atmospheric
scientist at the University of Michigan, said in an interview.
"Some people get it -- some people are driving hybrids. But
there is a problem with the American public."
Climate experts around the world agree one first step to
battling the buildup of polluting gases that is warming the
Earth is an agreement called the Kyoto Protocol, a 1997 pact
aimed at reducing greenhouse emissions.
More than 120 nations have ratified the pact or acceded to
it. President Bush pulled out in 2001, arguing Kyoto was too
expensive and unfairly excluded developing nations. The United
States is the world's biggest polluter, producing 36 percent of
Bush's advisers also cite doubts about models that predict
the course of global warming.
UNDERESTIMATING THE THREAT
The climate experts agreed there is debate about the models
but say if anything, they underestimate the extent of the
"The models ... are good enough to tell us we ought to be
starting now to do what we can to reduce emissions," said
Michael Oppenheimer, a professor of environmental science at
Oppenheimer said sea levels have risen 4 inches (9 cm)
already over the past century and could rise between 4 and 40
inches (9 to 88 cm) more in the next century.
Both the Greenland and the West Antarctic ice sheets are
"highly vulnerable" to global warming, Oppenheimer said. If
completely melted, the Greenland ice sheet would add 25 feet to
overall sea level and the West Antarctic Ice Sheet would raise
it by 16 feet.
This would be enough to swamp most of Florida, Bangladesh
and Manhattan, he said.
"The sea level rise over the past century appears greater
than what the model says it should be," Oppenheimer said. "The
ice sheets may be contributing more than the models predict."
The researchers said they hoped to convince the U.S. public
to pressure politicians into policy changes.
"In this country it depends a lot on what happens in the
next election," said geochemist Daniel Schrag of Harvard
University. "I don't think we can expect to change the minds of
this administration in the next couple of months."
Schrag said the current concentration of carbon dioxide in
the atmosphere is 380 parts per million -- higher than it has
been for at least the past 430,000 years.
"In the next 100 years, unless immediate action is taken,
carbon dioxide levels will rise to between 800 and 1,000 parts
per million. The last time carbon dioxide was that high was
during the Eocene, 55 to 36 million years ago," Schrag added.
At that time he said "palm trees lived in Wyoming,
crocodiles lived in the Arctic, Antarctica was a pine forest
and sea level was at least 300 feet higher than today."
© Copyright 2004 Reuters Ltd