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Haven't followed this thread from the earlier posts, so apologies if this
is not actually the question at hand, but here's what I understand about
the relationship between global warming and rising sea levels:<br><br>
Melting of ice caps on land (esp Greenland, but also parts of Antarctica)
is a much larger predicted cause of rising sea levels than is melting of
ice in/on water because the latter are already in the water to a large
degree so their melting will not add as significantly to sea levels as
will the addition of water that is currently on top of land.<br><br>
Warmer water expands (separate from the ice expansion question) so, even
without the addition of water from melting icecaps, sea levels will rise
as the oceans warm.<br><br>
David Bergman RA LEED AP<br>
<font size=2 color="#808080"><b>DAVID BERGMAN</b> ARCHITECT / <b>FIRE
& WATER</b> LIGHTING + FURNITURE<br>
</font><font color="#808080">architecture . interiors .
</font><font color="#008080">ecodesign</font><font color="#808080"> .
lighting . furniture<br>
</font><font size=2 color="#808080">bergman@cyberg.com
<a href="http://www.cyberg.com/" eudora="autourl"><u>www.cyberg.com</a>
</u></font><font color="#808080"> <br>
</font><font size=2 color="#808080">241 Eldridge Street #3R, New York, NY
10002<br>
</font><font color="#808080">t </font><font size=2 color="#808080">212
475 3106 f 212 677 7291</font><font color="#808080">
<br><br>
author - Sustainable Design: A Critical Guide<br>
blog -
<a href="http://www.ecooptimism.com/" eudora="autourl"><u>
www.EcoOptimism.com</a></u> <br>
adjunct faculty - Parsons The New School for Design</font> <br><br>
<br>
At 08:32 AM 8/31/2012, Eli Talking wrote:<br>
<blockquote type=cite class=cite cite=""><font size=4>My understanding is
the reason water ice has a higher volume than water liquid is that it
entraps air in the crystal structure. My hunch is that if you
subtracted the volume of gas air within the ice structure, the volume of
the water would be less than the liquid equivalent by weight. <br>
</font> <br>
<font size=4>Eli <br>
</font> <br>
<b>From:</b> <a href="mailto:steve@tjiang.org">Steven Tjiang</a> <br>
<b>Sent:</b> Thursday, August 30, 2012 11:55 AM<br>
<b>To:</b> <a href="mailto:greenbuilding@lists.bioenergylists.org">Green
Building</a> <br>
<b>Subject:</b> Re: [Greenbuilding] Climate breakdown is here. (polar ice
melt)<br>
<br>
I don't think it's the ice in the water that will raise sea levels; It's
all the ice that isn't in the water (i.e. Green land and
Antarctica). Also if the sea ice is melting it also likely the
landlocked ice is also melting and thus adding more water to the
"tub". <br>
<br>
---- Steve (KZ6LSD)<br><br>
<br>
On Wed, Aug 29, 2012 at 9:47 AM, Joe Killian
<<a href="mailto:kaa-ajk@sonic.net">kaa-ajk@sonic.net</a>>
wrote:<br>
<dl>
<dd> Classic trick high school question:<br>
<dd> Fill a glass with ice, add water to the brim (top of ice will
float higher). Let it melt. Does it overflow?<br>
<dd> Answer: No. The weight (mass) of water displaced
by the floating ice is the same as the weight of all the ice, which
is also the same volume of the displaced water once melted.<br>
<dd> So melting sea ice doesn't raise (or lower) sea level.<br>
<dd> The fresh water added to the ocean, however, may well
accelerate the feared effect of the melting Greenland ice adding fresh
water to the North Atlantic and potentially (inevitably?) changing the
course of the Gulf Stream. Whereupon northern Europe's climate
becomes more like Siberia's climate.<br>
<dd> Hang on....<br>
<dd>Joe<br><br>
<br><br>
<dd>On 8/29/2012 8:32 AM, Alan Abrams wrote:<br>
<blockquote type=cite class=cite cite="">
<dd>if salt water is more dense than fresh--then when the ice pack melts,
does this not result in a rise in sea level? No, wait, ice
contracts when it melts. But most of a floating mass of ice is
submerged, and the volume of the exposed mass is equal to the increase in
volume as a result of freezing...<br><br>
<dd>...ouch. my head hurts.<br><br>
<dd>-AA<br><br>
<dd>Alan Abrams<br>
<dd>Abrams Design Build LLC</b><br>
<dd>design for purposeful living</i><br>
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<dd>Takoma Park, MD 20912<br>
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<a href="tel:%28301-270-6380">(301-270-6380</a>) <br>
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alan@abramsdesignbuild.com</a><br>
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