| Topic: |
Politics > Politics-USA |
| User: |
"*Harry Hope" |
| Date: |
04 Aug 2005 10:00:50 AM |
| Object: |
Collapse of Antarctic ice shelf could have global effects. |
http://www.cbc.ca/story/science/national/2005/08/03/ice-shelf050803.html
Collapse of Antarctic ice shelf could have global effects
03 Aug 2005
CBC News
The unprecedented collapse of an ice-shelf in Antarctic could
indirectly lead to a significant rise in global sea levels,
researchers say.
The Larsen B ice shelf covered more than 3,000 square kilometres and
was 200 metres thick until its northern part disintegrated in the
1990s.
Three years ago, the central part also broke up.
An international team of researchers used data collected from six
sediment cores near the former ice shelf to show the shelf had been
relatively intact for at least 10,000 years or since the last ice age.
The collapse therefore goes beyond what would be expected naturally at
the time.
Rather, the demise is likely the result of long-term thinning due to
melting from underneath, as well as short-term surface melting from
global climate change, the researchers suggest.
Then in five years, the shelf shrunk by 5,700 square kilometres, say
scientists who found the break up caused changes in currents and
species in the area.
"As the ice shelves are disintegrating, the glaciers that are feeding
them from the land are surging forward," said Robert Gilbert, a
geography professor at Queen's University in Kingston, Ont.
Glaciers are no longer being held back from the ice shelf, and are
pushing ice bergs into the sea, said Gilbert, one of the co-authors of
the study in Thursday's issue of the journal Nature.
As the glaciers melt, global sea levels could change more than
predicted, he said.
Flooding could result in low-lying areas.
Scientists are now watching to see if the most southern part of the
Larsen ice shelf, the coldest part of Antarctica, is going to break
up.
_______________________________________________________
Harry
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| User: "Bob Eldred" |
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| Title: Re: Collapse of Antarctic ice shelf could have global effects. |
04 Aug 2005 10:48:02 AM |
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"*Harry Hope" <rivrvu@ix.netcom.com> wrote in message
news:scb4f1le7j6rqrv9rtgjhl41i5gfp4fd1p@4ax.com...
http://www.cbc.ca/story/science/national/2005/08/03/ice-shelf050803.html
Collapse of Antarctic ice shelf could have global effects
03 Aug 2005
CBC News
The unprecedented collapse of an ice-shelf in Antarctic could
indirectly lead to a significant rise in global sea levels,
researchers say.
The Larsen B ice shelf covered more than 3,000 square kilometres and
was 200 metres thick until its northern part disintegrated in the
1990s.
Three years ago, the central part also broke up.
An international team of researchers used data collected from six
sediment cores near the former ice shelf to show the shelf had been
relatively intact for at least 10,000 years or since the last ice age.
The collapse therefore goes beyond what would be expected naturally at
the time.
Rather, the demise is likely the result of long-term thinning due to
melting from underneath, as well as short-term surface melting from
global climate change, the researchers suggest.
Then in five years, the shelf shrunk by 5,700 square kilometres, say
scientists who found the break up caused changes in currents and
species in the area.
"As the ice shelves are disintegrating, the glaciers that are feeding
them from the land are surging forward," said Robert Gilbert, a
geography professor at Queen's University in Kingston, Ont.
Glaciers are no longer being held back from the ice shelf, and are
pushing ice bergs into the sea, said Gilbert, one of the co-authors of
the study in Thursday's issue of the journal Nature.
As the glaciers melt, global sea levels could change more than
predicted, he said.
Flooding could result in low-lying areas.
Scientists are now watching to see if the most southern part of the
Larsen ice shelf, the coldest part of Antarctica, is going to break
up.
_______________________________________________________
Harry
The shelf was 3000 sq. kilometers then it shrank by 5700 sq. kilometers????
That's a tough trick! While most educated people agree that global warming
is involved in the unprecedented loss of ice, world wide, making
contradictory statements obviously in error or stated wrong do not help to
convince people that there is a problem. We need to be especially vigilant
to insure that such statements are clear, concise and accurate. At the very
minimum, copy needs to be edited for accurate content. This appears to be a
case of a cobbled together story from a number of sources without editing.
Lets get it together folks and avoid idiotic and contradictory statements.
Bob
.
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| User: "Larry Hewitt" |
|
| Title: Re: Collapse of Antarctic ice shelf could have global effects. |
04 Aug 2005 01:09:08 PM |
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"Bob Eldred" <nsmontassoc@yahoo.com> wrote in message
news:f3af8$42f2389b$42a7d082$29119@msgid.meganewsservers.com...
"*Harry Hope" <rivrvu@ix.netcom.com> wrote in message
news:scb4f1le7j6rqrv9rtgjhl41i5gfp4fd1p@4ax.com...
http://www.cbc.ca/story/science/national/2005/08/03/ice-shelf050803.html
Collapse of Antarctic ice shelf could have global effects
03 Aug 2005
CBC News
The unprecedented collapse of an ice-shelf in Antarctic could
indirectly lead to a significant rise in global sea levels,
researchers say.
The Larsen B ice shelf covered more than 3,000 square kilometres and
was 200 metres thick until its northern part disintegrated in the
1990s.
Three years ago, the central part also broke up.
An international team of researchers used data collected from six
sediment cores near the former ice shelf to show the shelf had been
relatively intact for at least 10,000 years or since the last ice age.
The collapse therefore goes beyond what would be expected naturally at
the time.
Rather, the demise is likely the result of long-term thinning due to
melting from underneath, as well as short-term surface melting from
global climate change, the researchers suggest.
Then in five years, the shelf shrunk by 5,700 square kilometres, say
scientists who found the break up caused changes in currents and
species in the area.
"As the ice shelves are disintegrating, the glaciers that are feeding
them from the land are surging forward," said Robert Gilbert, a
geography professor at Queen's University in Kingston, Ont.
Glaciers are no longer being held back from the ice shelf, and are
pushing ice bergs into the sea, said Gilbert, one of the co-authors of
the study in Thursday's issue of the journal Nature.
As the glaciers melt, global sea levels could change more than
predicted, he said.
Flooding could result in low-lying areas.
Scientists are now watching to see if the most southern part of the
Larsen ice shelf, the coldest part of Antarctica, is going to break
up.
_______________________________________________________
Harry
The shelf was 3000 sq. kilometers then it shrank by 5700 sq.
kilometers????
The article is poorly written. It should have noted that the ice shelf is
part of a large glaicier, and that hte events of hte last few years have
both caused the glacier and ice shelf to thin AND have accelerated the
movement of the galcier out to see --- enlarging the ice shelf !
Melt water ahs gotten undr the glacier, lubricating it. This lubrication has
sped the movement of the glacier down hill, enlarging the ice shelf.
http://nsidc.org/iceshelves/larsenb2002/
In fact, this phenomenon is being seen all over the world. Greenland's
glaciers are behaving in the same way. For example. the Sermalik glacier, I
believe, has sped up from a couple of feet a day to over a hundred feet a
day becuse of meltwater accumulating under the glacier. This one glacier is
estimated to be rsonsible for 4% of the rise in sea level all by itself.
That's a tough trick! While most educated people agree that global warming
is involved in the unprecedented loss of ice, world wide, making
contradictory statements obviously in error or stated wrong do not help to
convince people that there is a problem. We need to be especially vigilant
to insure that such statements are clear, concise and accurate. At the
very
minimum, copy needs to be edited for accurate content. This appears to be
a
case of a cobbled together story from a number of sources without editing.
Lets get it together folks and avoid idiotic and contradictory statements.
Bob
May I suggest that you be sure you know what you are talking about next time
before you go off on a rant?
Larry
.
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| User: "Dana" |
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| Title: Re: Collapse of Antarctic ice shelf could have global effects. |
04 Aug 2005 08:48:42 PM |
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--
Citizens [of the United States] who associate themselves with the military
arm of the enemy government, and with its aid, guidance, and direction enter
this country bent on hostile acts are enemy belligerents within the meaning
of the Hague Convention and the law of war.32
- Chief Justice Harlan Fiske Stone, Ex Parte Quirin
"Larry Hewitt" <larryhewi@comporium.net> wrote in message
news:dctlmk$4g3m$1@news3.infoave.net...
"Bob Eldred" <nsmontassoc@yahoo.com> wrote in message
news:f3af8$42f2389b$42a7d082$29119@msgid.meganewsservers.com...
"*Harry Hope" <rivrvu@ix.netcom.com> wrote in message
news:scb4f1le7j6rqrv9rtgjhl41i5gfp4fd1p@4ax.com...
http://www.cbc.ca/story/science/national/2005/08/03/ice-shelf050803.html
Collapse of Antarctic ice shelf could have global effects
03 Aug 2005
CBC News
The unprecedented collapse of an ice-shelf in Antarctic could
indirectly lead to a significant rise in global sea levels,
researchers say.
The Larsen B ice shelf covered more than 3,000 square kilometres and
was 200 metres thick until its northern part disintegrated in the
1990s.
Three years ago, the central part also broke up.
An international team of researchers used data collected from six
sediment cores near the former ice shelf to show the shelf had been
relatively intact for at least 10,000 years or since the last ice age.
The collapse therefore goes beyond what would be expected naturally at
the time.
Rather, the demise is likely the result of long-term thinning due to
melting from underneath, as well as short-term surface melting from
global climate change, the researchers suggest.
Then in five years, the shelf shrunk by 5,700 square kilometres, say
scientists who found the break up caused changes in currents and
species in the area.
"As the ice shelves are disintegrating, the glaciers that are feeding
them from the land are surging forward," said Robert Gilbert, a
geography professor at Queen's University in Kingston, Ont.
Glaciers are no longer being held back from the ice shelf, and are
pushing ice bergs into the sea, said Gilbert, one of the co-authors of
the study in Thursday's issue of the journal Nature.
As the glaciers melt, global sea levels could change more than
predicted, he said.
Flooding could result in low-lying areas.
Scientists are now watching to see if the most southern part of the
Larsen ice shelf, the coldest part of Antarctica, is going to break
up.
_______________________________________________________
Harry
The shelf was 3000 sq. kilometers then it shrank by 5700 sq.
kilometers????
The article is poorly written. It should have noted that the ice shelf is
part of a large glaicier, and that hte events of hte last few years have
both caused the glacier and ice shelf to thin AND have accelerated the
movement of the galcier out to see --- enlarging the ice shelf !
http://www.greeningearthsociety.org/Articles/2002/vca10.htm
Both Revkin and Pianin, to their credit, point out that the Antarctic
continent, on average, cooled during the past twenty to thirty years (for
more detail, see our Virtual Climate Alert at
http://www.co2andclimate.org/Articles/2002/vca3.htm). Some Antarctic
glaciers have been growing. As a consequence, it is difficult to claim that
anthropogenic global warming is the culprit for the ice sheet's breakdown
when at the same time large, adjacent regions are cooling. Instead, regional
warming around the ice shelf (including a reportedly very warm summer) is
the likely candidate.
Melt water ahs gotten undr the glacier, lubricating it. This lubrication
has
sped the movement of the glacier down hill, enlarging the ice shelf.
http://nsidc.org/iceshelves/larsenb2002/
In fact, this phenomenon is being seen all over the world. Greenland's
glaciers are behaving in the same way. For example. the Sermalik glacier,
I
believe, has sped up from a couple of feet a day to over a hundred feet a
day becuse of meltwater accumulating under the glacier. This one glacier
is
estimated to be rsonsible for 4% of the rise in sea level all by itself.
That's a tough trick! While most educated people agree that global
warming
is involved in the unprecedented loss of ice, world wide, making
contradictory statements obviously in error or stated wrong do not help
to
convince people that there is a problem. We need to be especially
vigilant
to insure that such statements are clear, concise and accurate. At the
very
minimum, copy needs to be edited for accurate content. This appears to
be
a
case of a cobbled together story from a number of sources without
editing.
Lets get it together folks and avoid idiotic and contradictory
statements.
Bob
May I suggest that you be sure you know what you are talking about next
time
before you go off on a rant?
Larry
.
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| User: "Dana" |
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| Title: Re: Collapse of Antarctic ice shelf could have global effects. |
04 Aug 2005 08:42:04 PM |
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"*Harry Hope" <rivrvu@ix.netcom.com> wrote in message
news:scb4f1le7j6rqrv9rtgjhl41i5gfp4fd1p@4ax.com...
Collapse of Antarctic ice shelf could have global effects
Maybe Harry has not been keeping up, but the scientists now say that more
Ice and snow is accumulating in the Antarctic.
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| User: "" |
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| Title: Re: Collapse of Antarctic ice shelf could have global effects. |
05 Aug 2005 12:20:26 AM |
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but the scientists now say that more
Ice and snow is accumulating in the Antarctic.
It may be true. That doesn't mean ice shelfs aren't collapsing, or that the
article isn't right. It simply means that, given global warming's
hard-to-predict consqeuences on storm patterns, more moisture may be carried
to Antarctica, which then turns into snow, than before. Just like all these
freaky weather patterns we're getting lately. Which is why some people think
Global Weirding is actually a better term than Global Warming. The planet is
warming, but it doesn't always produce easy to predict results because of
that.
Global Warming Might Create Lopsided Planet
http://www.livescience.com/environment/050629_lopsided_planet.html
"Some of the melt in the Arctic may be balanced by increases in sea ice
volume in the Antarctic."
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