NASA CALLS ARTIC MELTING ALARMING

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NASA Calls Arctic Melting ‘Alarming’
(Sept.
06) — Icebreakers crunching their way through the Arctic ice pack at
the top of the world are finding more open water than ever, CBS News
correspondent Jerry Bowen reports.NASA scientists say it’s all because
of what they call an “alarming” rapid melting of winter sea ice — the
usually permanent ice cover over the Arctic Ocean. In just the past two
years, it has shrunk by 14 percent. The loss has been just at the
edges, but it’s still a Texas-sized loss that researchers say is linked
to man-made global warming.”Sea ice melt is actually a consequence of
that warming. The fact that you have a longer melt period is also a
consequence of greenhouse warming,” says Josefino Comiso, a NASA
scientist.Scientists are studying ice thickness and water temperatures
in the very heart of the Artic at the North Pole. Two years ago, the
idea of an ice-free Arctic was a serious consideration.”It does
represent a fundamental change in our global climate. And it’s a
concern with any of the global warming scenarios,” says James Morison
of the University of Washington.NASA climate scientist James Hansen
believes the world has little time left to combat greenhouse gases. “I
think we have a very brief window of opportunity to deal with climate
change…no longer than a decade at the most,” he told a climate
conference this week.If nothing is done, the global warming forecasts
speak of rising sea levels worldwide – 3 feet to 20 foot higher seas
from Manhattan to Malibu by century’s end – but disaster planners say
there might still be a fix in the best-case scenario, a way to shore up
America. But there’s a cost.”The estimates of what it would cost to
defend or adapt the entire United States to the low estimates of rising
sea levels is a couple of hundred million dollars a year over the
coming century,” says Rob Lempert of the Rand Corporation.That’s if
policymakers take the warnings seriously. There are some who contend
global warming is fiction — that the sky is not falling. But at the top
of the world, something is going on: The ice is disappearing.

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September 15, 2006 at 12:28 PM