StreetScooby 5 #1 August 18, 2009 As billvon pointed out, melting icecaps won't cause a sea level rise. Why do some people insist that global warming will cause a rise in sea levels?We are all engines of karma Quote Share this post Link to post Share on other sites
idrankwhat 0 #2 August 18, 2009 Because melting glaciers will. Also, warmer water occupies a greater volume than colder water. Quote Share this post Link to post Share on other sites
kallend 2,150 #3 August 18, 2009 QuoteAs billvon pointed out, melting icecaps won't cause a sea level rise. Why do some people insist that global warming will cause a rise in sea levels? melting FLOATING ice won't change sea level. The Antarctic icecap isn't sea-ice.... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites
billvon 3,120 #4 August 18, 2009 > Why do some people insist that global warming will cause a rise in sea levels? Because: 1) If land-based ice melts, the water ends up in the ocean and sea levels rise 2) When water heats up, it expands. Quote Share this post Link to post Share on other sites
redlegphi 0 #5 August 18, 2009 As I believe Al Franken once wrote, "Antarctica: it's a continent, not an ice cube." Quote Share this post Link to post Share on other sites
marks2065 0 #6 August 18, 2009 Quote> Why do some people insist that global warming will cause a rise in sea levels? Because: 1) If land-based ice melts, the water ends up in the ocean and sea levels rise 2) When water heats up, it expands. QuoteLast I remember water expands when it freezes, reduces volume when warmed and evaporates when hot. Quote Share this post Link to post Share on other sites
kallend 2,150 #7 August 18, 2009 QuoteQuote> Why do some people insist that global warming will cause a rise in sea levels? Because: 1) If land-based ice melts, the water ends up in the ocean and sea levels rise 2) When water heats up, it expands. QuoteLast I remember water expands when it freezes, reduces volume when warmed . Only contracts from 0 degrees C to 4 degrees C. Then it expands on further heating.... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites
riddler 0 #8 August 18, 2009 Ice compresses to water, water then expands again while heating, and eventually gets really spread out into vapor as it evaporates. Or it can go right from ice to water vapor by sublimation.Trapped on the surface of a sphere. XKCD Quote Share this post Link to post Share on other sites
warpedskydiver 0 #9 August 18, 2009 Ice can also compress into what we know as "Blue Ice" It is much more dense than normal ice that has not been compressed under great pressure. Quote Share this post Link to post Share on other sites
billvon 3,120 #10 August 18, 2009 >Last I remember water expands when it freezes . . . Yep >reduces volume when warmed . . . Nope. When it warms from, say, 50F to 60F, it expands. >and evaporates when hot. It evaporates at any temperature, although warm dry air + warm water produces the fastest evaporation rates. Quote Share this post Link to post Share on other sites
kallend 2,150 #11 August 18, 2009 QuoteIce can also compress into what we know as "Blue Ice" It is much more dense than normal ice that has not been compressed under great pressure. And sometimes it falls off airliners.... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites
billvon 3,120 #12 August 18, 2009 >Ice can also compress into what we know as "Blue Ice" >It is much more dense than normal ice that has not been >compressed under great pressure. True! However, "blue ice" is more dense because all the air has been squeezed out by pressure, leaving only pure crystalline ice. If you froze lake water and ensured no air got in it, it would have the same density as blue ice. Most ice in glaciers is "white ice" which is compacted snow. It's less dense because there's still a lot of air in it. Quote Share this post Link to post Share on other sites
lawrocket 3 #13 August 18, 2009 Yes. The land-based icecaps could be problematic (or could not be problematic). We know that glacial ice has effects on the sea level. 18k years ago, when we were at the peak of the last big ice age, the sea level was about 400 feet less than today. That's not chump change. If all of the ice emlted in Greenland and Antarctica, it is predicted that the ocean would rise another 200 feet. If all of Greenland's ice melted they'd expect to see a rise of about 20 feet in sea level. Still, no small rise. Even the IPCC stated in 2001 that for all of the ice to melt, the global temperature would have to rise by 20 degrees C (about 36 F). So, that's the deal. My wife is hotter than your wife. Quote Share this post Link to post Share on other sites
StreetScooby 5 #14 August 18, 2009 Quote 1) If land-based ice melts, the water ends up in the ocean and sea levels rise That's what I was missing. Thanks.We are all engines of karma Quote Share this post Link to post Share on other sites
shropshire 0 #15 August 18, 2009 Who cares? I'm 50 have no kids ... The world will last longer then me Have fun suckers (.)Y(.) Chivalry is not dead; it only sleeps for want of work to do. - Jerome K Jerome Quote Share this post Link to post Share on other sites
