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Gmane
From: Eco Mann <brothnine-Re5JQEeQqe8AvxtiuMwx3w <at> public.gmane.org>
Subject: MMM. BBC. Arctic sea ice melt 'even faster'.
Newsgroups: gmane.culture.drugs.cannabis.action
Date: Thursday 19th June 2008 02:11:39 UTC (over 8 years ago)
The most important part of this article may be this:
"Greenland is already losing ice to the oceans, contributing to the gradual
rise in sea levels. The ice cap holds enough water to lift sea levels
globally by about 7m (22ft) if it all melted."

I believe it is melting faster too.


==== article begins ====

*BBC. Arctic sea ice melt 'even faster'. 18 June 2008.*
http://news.bbc.co.uk/2/hi/science/nature/7461707.stm

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    Arctic sea ice melt 'even faster'
     By Richard Black
 Environment correspondent, BBC News website

 [image: Seal. Image: Getty] A widespread Arctic melt would have major
impacts on wildlife

 *Arctic sea ice is melting even faster than last year, despite a cold
winter.*

Data from the US National Snow and Ice Data Center (NSIDC) shows that the
year began with ice covering a larger area than at the beginning of 2007.

But now it is down to levels seen last June, at the beginning of a summer
that broke records for sea ice loss.

Scientists on the project say that much of the ice is so thin that it melts
easily, and the Arctic may be ice-free in summer within five to 10 years.

    *I think we're going to beat last year's record, though I'd love to be
wrong*
  Julienne Stroeve
  "We had a bit more ice in the winter, although we were still way below
the
long-term average," said Julienne Stroeve from NSIDC in Boulder, Colorado.

"So we had a partial recovery; but the real issue is that most of the pack
ice has become really thin, and if we have a regular summer now, it can
just
melt away," she told BBC News.

In March, Nasa reported that the area covered by sea ice was slightly
larger
than in 2007, but much of it consisted of thin floes that had formed during
the previous winter. These are much less robust than thicker, less saline
floes that have already survived for several years.
[image: Graph] After a colder winter, ice has been melting even faster than
last year

A few years ago, scientists were predicting ice-free Arctic summers by
about
2080. Then computer models started projecting earlier dates, around 2030 to
2050.

Then came the 2007 summer that saw Arctic sea ice shrink to the smallest
extent ever recorded, down to 4.2 million sq km from 7.8 million sq km in
1980.

By the end of last year, one research group was forecasting ice-free
summers
by 2013.

"I think we're going to beat last year's record melt, though I'd love to be
wrong," said Dr Stroeve.

"If we do, then I don't think 2013 is far off anymore. If what we think is
going to happen does happen, then it'll be within a decade anyway."

*Rising tide*

Countries surrounding the Arctic are eyeing the economic opportunities that
melting ice might bring.

Canada and Russia are exploring soverignity claims over tracts of Arctic
seafloor, while just this week President Bush has urged more oil
exploration
in US waters - which could point the way to exploitation of reserves off
the
Alaskan coast.
     Summer ice cover in the Arctic has declined sharply

But from a climate point of view, the melt could bring global impacts
accelerating the rate of warming and of sea level rise.

"This is a positive feedback process," commented Dr Ian Willis, from the
Scott Polar Research Institute in Cambridge.

"Sea ice has a higher albedo (reflectivity) than ocean water; so as the ice
melts, the water absorbs more of the Sun's energy and warms up more, and
that in turn warms the atmosphere more - including the atmosphere over the
Greenland ice sheet."

Greenland is already losing ice to the oceans, contributing to the gradual
rise in sea levels. The ice cap holds enough water to lift sea levels
globally by about 7m (22ft) if it all melted.

Natural climatic cycles such as the Arctic Oscillation play a role in
year-to-year variations in ice cover. But Julienne Stroeve believes the sea
ice is now so thin that there is little chance of the melting trend turning
round.

"If the ice were as thin as it was in the 1970s, last year's conditions
would have brought a dip in cover, but nothing exceptional.

"But now it's so thin that you would have to have an exceptional sequence
of
cold winters and cold summers in order for it to rebuild."

[email protected]*




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====end of article====


---


eco mann,
Cannabis Action:
http://health.groups.yahoo.com/group/cannabisaction
http://health.groups.yahoo.com/group/mmmworld
Global Marijuana March:
http://en.wikipedia.org/wiki/Global_Marijuana_March
http://cannabis.wikia.com/wiki/Global_Marijuana_March
http://cannabis.wikia.com/wiki/Global_Marijuana_March_2008
WeedWiki - a Wikia wiki:
http://cannabis.wikia.com/wiki/Main_Page
Charts:
http://gallery.marihemp.com/charts
Iraqi casualty photos (graphic):
http://images.google.com/images?q=iraqi+casualties
Casualties, charts:
http://en.wikipedia.org/wiki/Casualties_of_the_Iraq_War


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