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#1
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(CBS/AP) More than 2 trillion tons of land ice in Greenland,
Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml |
#2
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On Dec 16, 2:46*pm, Roger Coppock wrote:
(CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml The estimated volume of all glaciers in the world is about 33 million km. The mass would be about 10^12 kg per cubic kilometer, that makes the mass of all glaciers about 3.3*10^7*10^12 = 3.3*10^19 km. (2^10*12)/(3.3*10^19) = 6.7* 10^(-8). I don't think the mass of all the ice in the world can be measured that accurately.- A. McIntire |
#3
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![]() "Roger Coppock" wrote in message ... (CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml Are you saying that more land ice hasn't formed elsewhere to offset this? |
#4
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On Dec 17, 4:36*am, "
wrote: On Dec 16, 2:46*pm, Roger Coppock wrote: (CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml *The estimated volume of all glaciers in the world is about 33 million km. *The mass would be about 10^12 kg per cubic kilometer, that makes the mass of all glaciers about 3.3*10^7*10^12 = 3.3*10^19 km. (2^10*12)/(3.3*10^19) = 6.7* 10^(-8). * I don't think the mass of all the ice in the world can be measured that accurately.- A. McIntire The more important amount is surely how much is calved from tidewater glaciers and from broken ice shelves that subsequently float. |
#5
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Buerste wrote:
"Roger Coppock" wrote in message ... (CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml Are you saying that more land ice hasn't formed elsewhere to offset this? Are you saying that more land ice has formed elsewhere? |
#6
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John M. wrote:
On Dec 17, 4:36 am, " wrote: On Dec 16, 2:46 pm, Roger Coppock wrote: (CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml The estimated volume of all glaciers in the world is about 33 million km. The mass would be about 10^12 kg per cubic kilometer, that makes the mass of all glaciers about 3.3*10^7*10^12 = 3.3*10^19 km. (2^10*12)/(3.3*10^19) = 6.7* 10^(-8). I don't think the mass of all the ice in the world can be measured that accurately.- A. McIntire The more important amount is surely how much is calved from tidewater glaciers and from broken ice shelves that subsequently float. What do you mean by "important"? In terms of the impact on the sea levels caused by ice melting, floating sea ice has no impact - see Archimedes Principle. Glaciers that reach the sea from the land will cause a rise in sea level whether they float or whether they melt- also Archimedes Principle. In terms of albedo, all forms of ice are equally important, but sea ice is seasonable and much more variable. |
#8
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![]() "Tom P" wrote in message ... Buerste wrote: "Roger Coppock" wrote in message ... (CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml Are you saying that more land ice hasn't formed elsewhere to offset this? Are you saying that more land ice has formed elsewhere? That isn't how it works. Plucking data that you like without looking at the whole picture is not scientific, it's at least misleading. I didn't make a statement with implications, and it's not my job to do your homework to make an accurate statement. If Roger had stated that ALL land-ice was depleting and could prove it, that would be meaningful. As it sits...it is not. Your position is always suspect of cherrypicking data, don't be surprised when you're called on it. |
#9
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On Tue, 16 Dec 2008 19:36:36 -0800 (PST), "
wrote: On Dec 16, 2:46*pm, Roger Coppock wrote: (CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml The estimated volume of all glaciers in the world is about 33 million km. The mass would be about 10^12 kg per cubic kilometer, that makes the mass of all glaciers about 3.3*10^7*10^12 = 3.3*10^19 km. (2^10*12)/(3.3*10^19) = 6.7* 10^(-8). I don't think the mass of all the ice in the world can be measured that accurately.- A. McIntire Two significant errors One major one.. Comparing Kg to Tonns.. Off by a factor of 1000.. And one minor one.. Fresh water ice has density of 0.9167 g/cm³ at 0 °C Corrections. 3.3e+7(km^3)*,9167e+9(tonns/(km^3) )== 3.03e+16 tonns. 2e+12 tonns/3.03e+16(tonns) == 6.6e-5. ==== Note: Earth's current thermal imbalance(+2.35W/m^2) is approximately +3.78e+19 kj per year. Enough excess thermal energy to melt 111 trillion tonns of ice per year. http://www.engineeringtoolbox.com/wa...ies-d_162.html One should expect the distribution of excess thermal energy among Earths major thermal sinks.. Ice caps, oceans, and atmosphere in an dynamic fashion. |
#10
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On Dec 16, 2:46*pm, Roger Coppock wrote:
(CBS/AP) More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming. More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. That matters, says CBS News correspondent Vicki Barker, because ice which melts on land contributes to rising sea levels. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, Luthcke said, and the Greenland melt seems to be accelerating. NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. [ . . . ] http://www.cbsnews.com/stories/2008/...n4670944.shtml Typical alarmist nonsense. They can say anything they want about artic ice and nobody is going to dispute them. And they know this. So they do. It's the journalists that allow them to get away with this blatant propaganda that are primarily at fault. |
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