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#1
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Will sea levels really rise if the glaciers melt?
I posting this here because there a good analytical minds here.
An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. R1 |
#2
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Will sea levels really rise if the glaciers melt?
In ,
Rebel1 typed: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Here is an alternate, and probably more appropriate, test that you could try. Start with a rectangular fish tank. Place dirt and rocks in it such that the dirt and rocks are high up on one end and have the dirt and rocks slope down toward the other end to where they are at zero height on the other end. Then, fill it half way with water and place ice in the water and also on the dirt/rock "hillside" that is above the water line. That would more accurately replicate the way that glaciers are on earth -- meaning that the glaciers are both on top of the ground/dirt/rocks and also partially in the ocean where the ocean meets the ground/dirt/rocks. Wait until the ice in the fish tank melts. Let us know if the water level rises in the fish tank as the ice melts. Wanna take a guess as to what will happen to the water level? |
#3
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Will sea levels really rise if the glaciers melt?
On Thu, 2 Apr 2015 17:54:46 -0400, "Jake29"
wrote: - meaning that the glaciers are both on top of the ground/dirt/rocks and also partially in the ocean where the ocean meets the ground/dirt/rocks. You can see floating ice bergs from an airplane Watch a Glacier break down into the ocean from a ship. |
#4
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Will sea levels really rise if the glaciers melt?
In ,
Oren typed: On Thu, 2 Apr 2015 17:54:46 -0400, "Jake29" wrote: - meaning that the glaciers are both on top of the ground/dirt/rocks and also partially in the ocean where the ocean meets the ground/dirt/rocks. You can see floating ice bergs from an airplane Yes, and depending on who the co-pilot is, and what his mental state at the time is, you might get a really close-up view of the icebergs and glaciers; at least for a few seconds before the crash. What? Too soon? |
#5
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Will sea levels really rise if the glaciers melt?
On Thu, 2 Apr 2015 17:54:46 -0400, "Jake29"
wrote: In , Rebel1 typed: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Here is an alternate, and probably more appropriate, test that you could try. Start with a rectangular fish tank. Place dirt and rocks in it such that the dirt and rocks are high up on one end and have the dirt and rocks slope down toward the other end to where they are at zero height on the other end. Then, fill it half way with water and place ice in the water and also on the dirt/rock "hillside" that is above the water line. That would more accurately replicate the way that glaciers are on earth -- meaning that the glaciers are both on top of the ground/dirt/rocks and also partially in the ocean where the ocean meets the ground/dirt/rocks. Wait until the ice in the fish tank melts. Let us know if the water level rises in the fish tank as the ice melts. Wanna take a guess as to what will happen to the water level? Yeah, The water level will drop. There will be two reasons: 1. Some of the water will be absorbed by the ground/dirt/rocks. 2. Some of the remaining water will evaporate because Al Gore says it will eventually get so friggin hot because of global warming that the water will cause that to happen. Not to mention that California congress woman, Barbara Lee, says that same global warming will force women to become prostitutes. |
#6
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Will sea levels really rise if the glaciers melt?
On Thu, 02 Apr 2015 17:40:45 -0500, Gordon Shumway
wrote: Not to mention that California congress woman, Barbara Lee, says that same global warming will force women to become prostitutes. That's a fact Jack Where do these people come from? _Miller Time: Climate change causing prostitution increase?_ http://video.foxnews.com/v/4148323413001/miller-time-climate-change-causing-prostitution-increase/?#sp=show-clips https://tinyurl.com/qdyx9ar |
#7
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Will sea levels really rise if the glaciers melt?
On Thursday, April 2, 2015 at 6:58:41 PM UTC-4, Oren wrote:
On Thu, 02 Apr 2015 17:40:45 -0500, Gordon Shumway wrote: Not to mention that California congress woman, Barbara Lee, says that same global warming will force women to become prostitutes. That's a fact Jack Where do these people come from? _Miller Time: Climate change causing prostitution increase?_ http://video.foxnews.com/v/4148323413001/miller-time-climate-change-causing-prostitution-increase/?#sp=show-clips https://tinyurl.com/qdyx9ar How about Kerry telling US diplomats that they need to prepare for climate change refugees? There are refugees, that's for sure. Fleeing, Syria, Libya, Iraq... We have ISIS and other muslim terrorists killing hundreds every day, leveling whole towns. Putin is taking the Ukraine, Iran is buidling nukes. And instead of focusing on the clear and present danger, Kerry is talking about climate change refugees. |
#8
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Will sea levels really rise if the glaciers melt?
On 4/3/2015 7:41 AM, trader_4 wrote:
How about Kerry telling US diplomats that they need to prepare for climate change refugees? There are refugees, that's for sure. Fleeing, Syria, Libya, Iraq... We have ISIS and other muslim terrorists killing hundreds every day, leveling whole towns. Putin is taking the Ukraine, Iran is buidling nukes. And instead of focusing on the clear and present danger, Kerry is talking about climate change refugees. Wonder what they will talk about, when the Republicans start investigating corruption? Scheduled to start investigation in year 2156, at this rate. - .. Christopher A. Young learn more about Jesus .. www.lds.org .. .. |
#9
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Will sea levels really rise if the glaciers melt?
In article ,
Gordon Shumway wrote: water will cause that to happen. Not to mention that California congress woman, Barbara Lee, says that same global warming will force women to become prostitutes. Finally, an upside to global warming! -- "Statistics are like bikinis. What they reveal is suggestive, but what they conceal is vital." -- Aaron Levenstein |
#10
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Will sea levels really rise if the glaciers melt?
Rebel,
You're focusing on the North Pole where everything is floating in the ocean. Think about the South Pole where much of the snow and ice is on land and will run into the oceans as it melts.And of course there's lots of snow and ice on North America, South America, Europe, and Asia. As you can see I don't think much of your ice cube experiment. Dave M. |
#11
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Will sea levels really rise if the glaciers melt?
On 4/2/2015 6:25 PM, David L. Martel wrote:
Rebel, You're focusing on the North Pole where everything is floating in the ocean. Think about the South Pole where much of the snow and ice is on land and will run into the oceans as it melts.And of course there's lots of snow and ice on North America, South America, Europe, and Asia. As you can see I don't think much of your ice cube experiment. Dave M. Good point. R1 |
#12
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Will sea levels really rise if the glaciers melt?
"Rebel1" wrote in message I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. R1 When the ice began to float, the contents reached equilibrium. The small amount of ice above water line would suggest that the level would rise as it melted. Not so. The ice crystal structure is larger than the liquid therefore it will float because the weight per volume is less. As the ice melts it goes back to the liquid structure which is smaller. Therefore, the water line you marked won't change. Make sense? phil k. |
#13
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Will sea levels really rise if the glaciers melt?
Rebel1 wrote:
I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html |
#14
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Will sea levels really rise if the glaciers melt?
On Thursday, April 2, 2015 at 6:36:18 PM UTC-5, Bob F wrote:
Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html No thinking involved, on their part... |
#15
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Will sea levels really rise if the glaciers melt?
On 04/02/2015 07:36 PM, Bob F wrote:
Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Hint: If you own inland property in Florida, you'll soon have an ocean view. |
#16
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Will sea levels really rise if the glaciers melt?
Mayhem wrote:
On 04/02/2015 07:36 PM, Bob F wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Hint: If you own inland property in Florida, you'll soon have an ocean view. If all the ice melts, Florida will be gone. http://ngm.nationalgeographic.com/20...ice-melted-map |
#17
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Will sea levels really rise if the glaciers melt?
On Fri, 3 Apr 2015 17:01:00 -0700, "Bob F" wrote:
If all the ice melts, Florida will be gone. No big loss...... Florida is the PENIS of the United States...... It sticks out, ready to FU_K other countries. And that also explains while all the old people go to Florida. Old men no longer have their own usable penis. Old women no longer have a penis to satisfy them! [LOL] |
#18
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Will sea levels really rise if the glaciers melt?
In article , "Bob F"
wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? |
#19
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Will sea levels really rise if the glaciers melt?
On 4/3/2015 9:47 AM, Mark Storkamp wrote:
Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? Groupthink. Collective wisdom, as dictated by the left party leaders. No room for facts or independant thinking. - .. Christopher A. Young learn more about Jesus .. www.lds.org .. .. |
#20
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Will sea levels really rise if the glaciers melt?
Mark Storkamp writes:
In article , "Bob F" wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? Yeah, the comment is a bit out of line isn't it. We can only speculate why Rebel1 thought he knew better than all the worlds scientists. But then, Rebel1 claimed "there are good analytical minds here". (Yes, I laughed so hard, I almost choked.) Maybe it's not so out of line to guess he was referencing those mass poster nut jobs that live in my kill file. The idea that scientists are scammers making things up for profit does seem to come from one political party. But only Rebel1 can explain why he suddenly thought he was smarter than a bunch of people that actually studied the subject. I wonder if he actually performed his "tall glass" experiment. I bet it was a tall jelly glass and a sharpie. We all know calibrated beakers, are for pinko scientists. -- Dan Espen |
#21
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Will sea levels really rise if the glaciers melt?
Dan Espen writes:
Mark Storkamp writes: In article , "Bob F" wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. [snip] We can only speculate why Rebel1 thought he knew better than all the worlds scientists. But then, Rebel1 claimed "there are good analytical minds here". (Yes, I laughed so hard, I almost choked.) Most of these folks see some headline written by a clueless reporter (often from both sides of the debate) and elaborate on that, rather than actually digging into the science itself. There are several contributors to planetary mean sea level (MSL). - Mel****er from land-based glacial ice - Fossil water runoff - Isostatic rebound - Wind The first, mel****er from land-based glacial ice encompasses the high altitude glaciers (e.g. in the himalayas, upper Rockies, Peru, mt. Shasta, etc), the greenland icecap and the antarctic icecap. The second, fossil water runoff is from pumping geologic water from underground for irrigation and other human uses. This adds water to the hydrologic cycle which raises sea level (in fact, this alone is responsible for something like 40% of the sea level rise in the 20th century). The third, isostatic rebound, appears to lower sea level at certain measuring stations as the land continues to recover from the weight of a mile of ice 10kya. A counterpoint of this is areas like southern La., where the land is sinking due to silting at the mouth of the mighty muddy. The largest two regions of land-based ice are the greenland icecap and the antarctica icecap. In both cases, the amount of time required to melt 100% of the ice is measured in thousands of years (note that the air temperature in antarctica is below freezing for 10 months of the year). Since the land ice in antarctica is surrounded by sea ice (which can melt more rapidly as the temperature of the water it is floating on changes with time, natural cycles and other forcings), a concern is that if all the sea ice melts, it will open the way for the land-based glaciers to flow more rapidly towards the sea and calve bergs, which will inevitably cause higher sea levels. As for Wind, certain coastal areas measure higher sea levels than others due to the wind pushing water towards the coast (leaving aside any tidal effects). All this makes it difficult to measure MSL accurately using surface based measurements. Modern measurements use satellite altimetry, which generally requires some amount of correction due to orbital decay characteristics and instrumental differences beween generations of measurement satellites. Current global sea ice area: http://arctic.atmos.uiuc.edu/cryosph....withtrend.jpg Current global sea ice anomoly (i.e. difference from average since 1979) http://arctic.atmos.uiuc.edu/cryosph...aly.global.png Global, Arctic and Antarctic ice area: http://www.climate4you.com/images/NS...SeaIceArea.gif Note that the planet currently has _more_ sea ice than the average since 1979 (when satellite measurements began). Note also two years ago, when there was 2 million km2 less. As others have pointed out, the melting of the sea ice has effectively no effect on MSL; however it does alter the albedo of the pole(s) which may reduce the amount of insolation reflected back to space, leading to additional warming of the surface water. |
#22
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Will sea levels really rise if the glaciers melt?
In ,
Mark Storkamp belched: In article , "Bob F" wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? oxymoron |
#23
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Will sea levels really rise if the glaciers melt?
On Fri, 03 Apr 2015 08:47:39 -0500, Mark Storkamp
wrote: In article , "Bob F" wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? I'll let you know if there ever is any. |
#24
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Will sea levels really rise if the glaciers melt?
Mark Storkamp wrote:
In article , "Bob F" wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? Doing a little basic research, and actually thinking about all the issues involved in the problem. Not making rash conclusions and basing your thinking on that, or basing your think on the desired results. |
#25
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Will sea levels really rise if the glaciers melt?
On Friday, April 3, 2015 at 7:54:45 PM UTC-4, Bob F wrote:
Mark Storkamp wrote: In article , "Bob F" wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? Doing a little basic research, and actually thinking about all the issues involved in the problem. Not making rash conclusions and basing your thinking on that, or basing your think on the desired results. Is that what lib Arizona congressman Raul Grijalva was doing a couple weeks ago when he sent letters to universities where there were scientists who had done research that cast doubt on global warming, demanding all their records, papers, emails going back years? |
#26
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Will sea levels really rise if the glaciers melt?
On 2015-04-03 9:47 AM, Mark Storkamp wrote:
In article , "Bob F" wrote: Rebel1 wrote: I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? In my case, it didn't. Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html Interesting. So asking questions, wondering about things, trying experiments and seeing what others have to say about it is "Good right wing thinking" What is good left wing thinking then? All partisanship is, by definition, NOT thinking at all. Left or right, if you are following a dogma, you are not thinking. This is why Col. Edmond Burke is more intelligent than politicians. |
#27
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Will sea levels really rise if the glaciers melt?
On 4/2/2015 7:36 PM, Bob F wrote:
Good right wing thinking. Just ignore the huge volume of glaciers on land. When they melt, they flow into the sea and cause it to rise. http://www.huffingtonpost.com/2012/1...n_2005861.html How much glacier, and how much ocean? Is that like saying if you spill your drink in the pool, the whole neighborhood will be under six inches of water? Good right wing thinking, eh? - .. Christopher A. Young learn more about Jesus .. www.lds.org .. .. |
#28
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Will sea levels really rise if the glaciers melt?
Per Rebel1:
An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? I'm no geologist but AFIK, the glaciers are not floating in the ocean. I think that's what icebergs are. Glaciers are sitting on land, so that when they melt their water is added to the ocean. ref: http://www.scientificamerican.com/article/what-happens-when-glaciers-melt/ Sounds to me like the math/physics are pretty straightforward assuming that the volume of the oceans and the volume of the glaciers are known but the wild card seems to be how fast the glaciers are melting. viz: http://www.scientificamerican.com/article/polar-ice-sheets-melting-faster-than-predicted/ -- Pete Cresswell |
#29
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Will sea levels really rise if the glaciers melt?
On 4/2/2015 7:39 PM, (PeteCresswell) wrote:
I'm no geologist but AFIK, the glaciers are not floating in the ocean. I think that's what icebergs are. Glaciers are sitting on land, so that when they melt their water is added to the ocean. ref: What kind of toast do you put in your toaster? Good catch, Mr. Cresswell. - .. Christopher A. Young learn more about Jesus .. www.lds.org .. .. |
#30
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Will sea levels really rise if the glaciers melt?
Per Stormin Mormon:
What kind of toast do you put in your toaster? Mainly bagels from the day-old shelf... -- Pete Cresswell |
#31
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Will sea levels really rise if the glaciers melt?
On Fri, 03 Apr 2015 13:07:54 -0400, "(PeteCresswell)"
wrote: What kind of toast do you put in your toaster? Mainly bagels from the day-old shelf... You toast day old bagels in your toaster from the day old shelf of toasted bagels? |
#32
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Will sea levels really rise if the glaciers melt?
On 4/3/2015 10:21 AM, Stormin Mormon wrote:
What kind of toast do you put in your toaster? Christopher A. Young Why would you put toast in your toaster? I only take it out. |
#33
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Will sea levels really rise if the glaciers melt?
On Friday, April 3, 2015 at 1:21:08 PM UTC-5, Ed Pawlowski wrote:
On 4/3/2015 10:21 AM, Stormin Mormon wrote: What kind of toast do you put in your toaster? Christopher A. Young Why would you put toast in your toaster? I only take it out. ....to reheat or make it darker. (don't make French toast in it) |
#34
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Will sea levels really rise if the glaciers melt?
beause minimizing global warming will cost business and business owners money they prefer to deny its occuring......
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#35
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Will sea levels really rise if the glaciers melt?
On 4/3/2015 2:24 PM, bob_villa wrote:
On Friday, April 3, 2015 at 1:21:08 PM UTC-5, Ed Pawlowski wrote: On 4/3/2015 10:21 AM, Stormin Mormon wrote: What kind of toast do you put in your toaster? Christopher A. Young Why would you put toast in your toaster? I only take it out. ...to reheat or make it darker. (don't make French toast in it) I do reheat leftover blueberry pancakes in it. |
#36
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Will sea levels really rise if the glaciers melt?
On Friday, April 3, 2015 at 2:21:08 PM UTC-4, Ed Pawlowski wrote:
On 4/3/2015 10:21 AM, Stormin Mormon wrote: What kind of toast do you put in your toaster? Christopher A. Young Why would you put toast in your toaster? I only take it out. Pretty sure he has a hot water heater, too........... |
#37
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Will sea levels really rise if the glaciers melt?
Rebel1 wrote in :
I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? That's not really relevant, because it models only sea ice. You need to consider everything: -- Most of the Arctic ice cap is sea ice, floating on the surface of the ocean. Melting this ice won't change sea level significantly, because it's displacing an equal mass of ocean water. (There will be a slight increase because fresh water is less dense than salt water.) -- Most of the Antarctic ice cap, and part of the Arctic ice cap (Greenland) is on land. Melting this will cause sea level to rise, because it isn't displacing any ocean water now, and most of it will wind up in the ocean. (Not all of it, because there's a substantial basin in the Antarctic interior that will become a large freshwater lake if enough of the southern ice melts.) -- Part of the Antarctic ice cap is resting on the continental shelf, *below* the surface of the ocean. Melting this will cause sea level to *drop* because it's displacing an equal *volume* of ocean water, not an equal mass. So what happens to sea level if the polar ice caps begin to melt depends heavily on how much of which ice cap liquifies. |
#38
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Will sea levels really rise if the glaciers melt?
On 4/2/2015 9:30 PM, Doug Miller wrote:
Rebel1 wrote in : I posting this here because there a good analytical minds here. An experiment: Fill a tall clear glass half-way with ice cubes. Then add enough water so the bottom cubes no longer touch the bottom (i.e., they are all floating). Now put a mark at the water level and wait until the cubes all melt. Did the water rise above your mark? That's not really relevant, because it models only sea ice. You need to consider everything: -- Most of the Arctic ice cap is sea ice, floating on the surface of the ocean. Melting this ice won't change sea level significantly, because it's displacing an equal mass of ocean water. (There will be a slight increase because fresh water is less dense than salt water.) -- Most of the Antarctic ice cap, and part of the Arctic ice cap (Greenland) is on land. Melting this will cause sea level to rise, because it isn't displacing any ocean water now, and most of it will wind up in the ocean. (Not all of it, because there's a substantial basin in the Antarctic interior that will become a large freshwater lake if enough of the southern ice melts.) -- Part of the Antarctic ice cap is resting on the continental shelf, *below* the surface of the ocean. Melting this will cause sea level to *drop* because it's displacing an equal *volume* of ocean water, not an equal mass. So what happens to sea level if the polar ice caps begin to melt depends heavily on how much of which ice cap liquifies. Excellent points. R1 |
#39
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Will sea levels really rise if the glaciers melt?
Rebel1 wrote:
.... Excellent points. here's a few mo as the mass of the water held in ice at the south pole decreases we get two additional effects, one is that the overall ocean level increases for the northern hemisphere increases not only from the amount of new water added to the oceans but the rebound from the water currently attracted to the gravity effect from that much mass. the other effect is that as the cold water warms up we also get an added boost in volume. one thing i don't see anyone mention very often is the amount of water that is being pumped from the ground, used in sewage/water supply systems and then dumped into the oceans. if we can reverse the trend and impound more of this water in reservoirs and ground water that can help slow down the rate of ocean level increases. where there are huge areas of inland seas below sea level we could pipe sea water into them to help moderate temperatures and evaporate more water into the air to increase rainfalls/snowpacks downwind. this would mean some plans for harvesting the salt from such seas to keep them from getting too salty, but last i knew there is a good market for sea salt... we do really need a good plan to address the Salton Sea mess anyways... as it goes, where one of my relatives is at he's lost 1ft of sea level and has only another foot and a half before that is gone. another 20-30 years and it is likely where he is at will be close to under water. songbird |
#40
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Will sea levels really rise if the glaciers melt?
On 4/2/2015 11:23 PM, Rebel1 wrote:
On 4/2/2015 9:30 PM, Doug Miller wrote: -- Part of the Antarctic ice cap is resting on the continental shelf, *below* the surface of the ocean. Melting this will cause sea level to *drop* because it's displacing an equal *volume* of ocean water, not an equal mass. So what happens to sea level if the polar ice caps begin to melt depends heavily on how much of which ice cap liquifies. Excellent points. R1 Is that left wing thinking? - .. Christopher A. Young learn more about Jesus .. www.lds.org .. .. |
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