• Massive crack in Antarctica ice shelf grows 11 miles in only 6 days
    34 replies, posted
[B][U]Massive crack in Antarctica ice shelf grows 11 miles in only 6 days[/U][/B] [url]https://www.usatoday.com/story/tech/sciencefair/2017/06/01/massive-iceberg-break-off-antarctica-crack-expands-11-miles/102385980/[/url] [IMG]http://i.imgur.com/0pds8ss.png[/IMG] [QUOTE] A massive crack in an Antarctic ice shelf grew by 11 miles in the past six days as one of the world's biggest icebergs ever is poised to break off. Only eight miles remain until the crack in the Larsen C ice shelf cuts all the way across, producing an iceberg about the size of the state of Delaware. [/QUOTE] [QUOTE] Once the iceberg breaks off, it "will fundamentally change the landscape of the Antarctic Peninsula," he said. [/QUOTE] :worried:
"Don't worry, it's just a small crack." Says Increasingly Nervous Man.
Cross posting: [QUOTE=BlindSniper17;52300712]Saw this elsewhere: [url]https://weather.com/[/url][/QUOTE] [IMG]https://pbs.twimg.com/media/DBQqYFcWAAA1tx1.jpg[/IMG]
:snip:
[QUOTE=Devil Traitor;52300898]Thanks a lot Donald Trump![/QUOTE] Man now I'm starting to believe in Poe's Law.
[QUOTE=Devil Traitor;52300898]Thanks a lot Donald Trump![/QUOTE] This has nothing to do with Trump, other than the coincidence of his announcement today.
[QUOTE=The Party Spy;52300960]This has nothing to do with Trump, other than the coincidence of his announcement today.[/QUOTE] Bailing out of the largest and most important ecological agreement in history won't help make things any better, though.
there's something big beneath trying to break free [editline]1st June 2017[/editline] antarctic rim
Fuck me, I can't fathom the consequences.
Well, ice is pretty brittle, and with cracks, the bigger they are, the much easier they are to crack even further. Just saying
[QUOTE=rampageturke 2;52300997]Well, ice is pretty brittle, and with cracks, the bigger they are, the much easier they are to crack even further. Just saying[/QUOTE] Does that mean all of the ice is going to melt away in the ocean causing sea levels to rise?
[QUOTE=Black Pete;52301014]Does that mean all of the ice is going to melt away in the ocean causing sea levels to rise?[/QUOTE] It speeds up the melting.
ffffUCK dude
[QUOTE=BlindSniper17;52300870]Cross posting: [IMG]https://pbs.twimg.com/media/DBQqYFcWAAA1tx1.jpg[/IMG][/QUOTE] weather.com is fucking pissed
I hope to see videos of the event
[QUOTE=Jund;52301103]weather.com is fucking pissed[/QUOTE] Rightfully so
[QUOTE=Jund;52301103]weather.com is fucking pissed[/QUOTE] At least they have job security.
[QUOTE=Black Pete;52301014]Does that mean all of the ice is going to melt away in the ocean causing sea levels to rise?[/QUOTE] Since the thing is already floating it will not contribute to sea level rise directly. [B]However[/B] It will contribute indirectly: [img]http://i.imgur.com/bqau7WW.png[/img] (Drawing in paint is still hard) I drew this little diagram to make it easier to visualize. Ice that is already floating on water does not contribute to sea level rise when it melts. Any increase in sea level caused by that mass of ice is already accounted for through displacement. Ice that does not [B]directly[/B] contribute to sea level rise includes: [B]Sea Ice:[/B] this is the stuff that melts and refreezes every year. You see a lot of it up north in the Arctic, and it's what used to cover most of the northwest passage. While this ice has been receding each year due to warmer winters, the melting of this ice [B]Does not[/B] raise the sea level. [B]Shelf Ice/Ice Bergs:[/B] The ice cubes in the glass of water. They hold a metric fuck-ton of water, but they're already floating in water, so the increase in sea level is already accounted for. The chunk of ice in this thread is one of these guys. He's a really really big ice berg, broken off from an even bigger chunk of ice, but all of it is already in the ocean.... so any increase in sea level from this fella plopping off will be negligible. Ice that does directly contribute is called [B]Sheet Ice:[/B] This is what makes up much of Antarctica and Greenland. It's large ice sheets [B]sitting on land.[/B] That's an important distinction. Since most of it is on land, when it melts the water runs off into the ocean, causing a net increase of water in the ocean. This [B]directly[/B] contributes to sea level rise. Now, all ice melting contributes [I]indirectly[/I] to sea level rise by changing earths albedo. That is, it's ability to reflect [url=https://www.youtube.com/watch?v=bTnzwvx4AO0]solar radiant energy.[/url] White surfaces reflect, while black surfaces absorb. From space, the ocean is essentially black. It's very absorbent. The ocean absorbs it as heat, which causes ice to melt (obviously). When we lose ice, we're replacing white with black. Were replacing our very reflective surfaces for very absorbent ones. It causes a positive feedback loop that eventually leads to the collapse of the earths ability to support ice. [QUOTE=Black Pete;52301014]Does that mean all of the ice is going to melt away in the ocean causing sea levels to rise?[/QUOTE] So no, but also yes. [I]Eventually. [/I]
ive just been watching arctic/antarctic nature docs lately and this makes me sad :(
So essentially, there's going to be an extra patch of bare ocean the size of Delaware, soaking up even more heat from the Sun and further accelerating the heating of our oceans overall. In other words, bad news all around. And what's worse is that this is something that probably CAN'T be solved via the ritualistic blood sacrifice of fossil fuel executives.
[QUOTE=OvB;52302059] [t]http://i.imgur.com/bqau7WW.png[/t] Long and detailed explanation. [/QUOTE] Why doesn't the part of the iceberg that is above sea-level not get factored in? Isn't it just basically like a bunch of sheet ice that hasn't been submerged yet?
[QUOTE=Saturn V;52302072]ive just been watching arctic/antarctic nature docs lately and this makes me sad :([/QUOTE] You live in Finland, 70% of your life is an arctic nature doc :v:
[QUOTE=Zenreon117;52302106]Why doesn't the part of the iceberg that is above sea-level not get factored in? Isn't it just basically like a bunch of sheet ice that hasn't been submerged yet?[/QUOTE] [QUOTE=Zenreon117;52302106]Why doesn't the part of the iceberg that is above sea-level not get factored in? Isn't it just basically like a bunch of sheet ice that hasn't been submerged yet?[/QUOTE] Law of flotation. A floating body displaces it's own weight in the fluid. 1 ton of ice will displace 1 ton of ocean, and when it melts it will still be 1 ton of water, only adding 1 ton of ocean. Now if you want to get super technical, water expands as it gets warmer. So when it melts there will be an almost immeasurable change in sea level(nano-meters each year), because it's ice-cold water turning into cool water. But for all intents-and-purposes, it doesn't raise sea level. The thermal expansion of the ocean itself is probably a bigger contributor than slight thermal expansion from melted bergs. Basically, if it's already floating, it's all factored in. [editline]1st June 2017[/editline] Fun fact: According to [url=https://what-if.xkcd.com/33/]XKCD What If?[/url] all the worlds ships account for about 6 microns worth of sea level rise.
[QUOTE=OvB;52302219]Fun fact: According to [url=https://what-if.xkcd.com/33/]XKCD What If?[/url] all the worlds ships account for about 6 microns worth of sea level rise.[/QUOTE] How much does your boat displace?
[QUOTE=Bradyns;52302380]How much does your boat displace?[/QUOTE] About [CLASSIFIED].
Isn't this the way The day after tomorrow begins? [video=youtube;mjw8KdCBHsc]https://www.youtube.com/watch?v=mjw8KdCBHsc[/video] I think it's even the same ice shelf breaking as in the actual film.
[QUOTE=OvB;52302059]Since the thing is already floating it will not contribute to sea level rise directly. [B]However[/B] It will contribute indirectly: [img]http://i.imgur.com/bqau7WW.png[/img] (Drawing in paint is still hard) I drew this little diagram to make it easier to visualize. Ice that is already floating on water does not contribute to sea level rise when it melts. Any increase in sea level caused by that mass of ice is already accounted for through displacement. Ice that does not [B]directly[/B] contribute to sea level rise includes: [B]Sea Ice:[/B] this is the stuff that melts and refreezes every year. You see a lot of it up north in the Arctic, and it's what used to cover most of the northwest passage. While this ice has been receding each year due to warmer winters, the melting of this ice [B]Does not[/B] raise the sea level. [B]Shelf Ice/Ice Bergs:[/B] The ice cubes in the glass of water. They hold a metric fuck-ton of water, but they're already floating in water, so the increase in sea level is already accounted for. The chunk of ice in this thread is one of these guys. He's a really really big ice berg, broken off from an even bigger chunk of ice, but all of it is already in the ocean.... so any increase in sea level from this fella plopping off will be negligible. Ice that does directly contribute is called [B]Sheet Ice:[/B] This is what makes up much of Antarctica and Greenland. It's large ice sheets [B]sitting on land.[/B] That's an important distinction. Since most of it is on land, when it melts the water runs off into the ocean, causing a net increase of water in the ocean. This [B]directly[/B] contributes to sea level rise. Now, all ice melting contributes [I]indirectly[/I] to sea level rise by changing earths albedo. That is, it's ability to reflect [url=https://www.youtube.com/watch?v=bTnzwvx4AO0]solar radiant energy.[/url] White surfaces reflect, while black surfaces absorb. From space, the ocean is essentially black. It's very absorbent. The ocean absorbs it as heat, which causes ice to melt (obviously). When we lose ice, we're replacing white with black. Were replacing our very reflective surfaces for very absorbent ones. It causes a positive feedback loop that eventually leads to the collapse of the earths ability to support ice. So no, but also yes. [I]Eventually. [/I][/QUOTE] Isn't ice more dense than water? Won't it increase in volume when it melts?
[QUOTE=Laserbeams;52303329]Isn't ice more dense than water? Won't it increase in volume when it melts?[/QUOTE] It's less dense, actually, which is why it floats.
[QUOTE=Laserbeams;52303329]Isn't ice more dense than water? Won't it increase in volume when it melts?[/QUOTE] Other way around. Remember that if you put a glass bottle of liquid in the freezer, the expanding ice will cause it to crack/explode.
All part of my plan to finally take over antarctica, unite the penguins under one leader, and sell organic ice to hippies and everyone else as they burn to death. [Sp] /s. Really though, we're fucked.[/sp]
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