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Old Feb 10, 2008, 12:22 AM
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Vikings wiped out in Greenland


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Old Feb 10, 2008, 12:30 AM
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After four mild centuries, Greenland's climate turned grim in 1280 -- too cold for Norsemen to venture out to to farm, let alone rape, pillage, loot, or burn. Had Viking vices included climate modeling, King Magnus Law-Mender might have sent a long ship south to ask the Sultan of Solo throw some extra virgins in volcanoes, for evidence from the ice caps of Baffin Island, Geophysical Research Letters reports, focuses blame for the end of the Medieval Warm period on tropical eruptions.
Red_cloud_1350x998_2
The paper by Professor Gifford Miller of the University of Colorado Institute of Arctic and Alpine Research uses radiocarbon dating of plant remains emerging from beneath the receding ice to show it has shrunk 50 % since 1950 due to warming temperatures, and may vanish by midcentury. The Baffin Island ice caps are now smaller in area than at any time in the last 1,600 years,

"Even with no additional warming, our study indicates these ice caps will be gone in 50 years or less," he said.

The study also showed two distinct ice cap growth bursts around 1280 A.D. and 1450 A.D., matching ice core records of stratospheric aerosols. Miller take this to imply that major tropical volcanic eruptions caused the Little Ice Age that wiped out the Viking colonies in Greenland.

Most of Baffin's 196,000 square miles lie above the Arctic Circle.The research incorporates a half century of satellite data and aerial photos to document the shrinkage of the more than 20 ice caps on the island's northern plateau. Up to four miles long and generally less than 100 yards thick, and frozen to their beds,Miller says their

"ice is so cold and thin that it doesn't flow, so the ancient landscape on which they formed is preserved pretty much intact"

20080128_baffin_2 In addition to carbon-dating plant material from the ice edges, the researchers extracted and analyzed carbon 14 that formed inside the Baffin Island rocks as a result of ongoing cosmic radiation bombardment, revealing the amount of time the rocks have been exposed,. Carbon 14 in quartz indicates that several thousand years ago the island had more extensive ice cover, which

Miller thinks was caused by decreasing summer sun as a result of precession of the Earth's axis. "This makes the recent ice cap reduction on Baffin Island even more striking."

Funded by the NSF, the study is remarkable for its novel use of radiocarbon samples from rocks for dating ice advance and retreat. Carbon 14 is formed by cosmic ray neutrons interacting with nitrogen, which comprises most of the atmosphere. There are traces of nitrogen in quartz as well, and recent advances in accelerator mass spectroscopy enable the traces of 14C formed in quartz to be counted in some cases literally one atom at a time, to date how long it has been exposed to the sky or shielded by ice-- 10 meters of water, liquid or solid, roughly approximates the shielding effect of the atmosphere.

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Old Feb 10, 2008, 02:47 AM
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A volcano just blew in Ecquador. A few of those going off here and there could have major cooling effects.
Old Feb 10, 2008, 05:08 AM
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So what caused this "Midieval warm period" which allowed the Vikings to sail into ice-free ports and set up farms?

Were they all driving SUVs?
Old Feb 10, 2008, 08:52 AM
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An itch?. Scratch build.
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Just imagine the headline - "Viking longboats caused Global Cooling"

then later on - "Viking pillaging causes Global Warming. The constant burning of villages is polluting the atmosphere."
Old Feb 10, 2008, 12:12 PM
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apparently the viking long ships were suv

apparently they used up their energy supply and other resources and then froze to death.

I don't want to die that way--being cold hurts!

I think I better add this or this


REALLY---glad to see this part of the world returning to pre 1280ad conditions and us having a new(to us) green spot.
Green land
--it got its name for some reason
Old Feb 10, 2008, 12:19 PM
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Viking longboats cannot be considered SUV's unless they are stripped of mast and used as battering rams during the rape, pillage portion of the journey.

Seriously, there were land bridges at times. They didnt need to sail into icefree ports.
Old Feb 10, 2008, 01:01 PM
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HUUUMMMN

Land bridges-----

starting to sound like the world has always gone through major and or rapid and or viloent and drastic changes

I almost feel like we live in stable quite times---

Eflightray
you want a job as editor?
I think you would be a good one
Old Feb 10, 2008, 01:04 PM
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Noone EVER said there were not periods of changing climate.
Old Feb 10, 2008, 01:14 PM
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---don't know if anyone did or didn't say that---

Just thinking out loud as im to noisy to keep in
Old Feb 10, 2008, 01:22 PM
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Tu ne cede malis
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Humans survived all of them with rocks and bone tools, but now that we have tools, earthmovers, and more adaptability than ever, we're on the edge of extinction..

(Oh yeah, we're running out of everything. Forgot that part. )
Old Feb 10, 2008, 01:25 PM
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--on going isolated/local major/changes changes
that mostly balance out during on going process?


Head lines
WAR WAGING VIKINGS CAUSE COPPER SHORTAGE

possibly Running out of mineable copper in less than 50 years?

Our current known supply of mineable copper is expected to run out around 2050 based on current consumption of 18 million tons annually, which means that barring new discoveries or mining in space (which seems unlikely given the logistics of getting the copper back to earth) we will have to reduce our dependence on copper by using less of it and using more of what we have already mined.

http://209.85.165.104/search?q=cache...lnk&cd=2&gl=us
Old Feb 10, 2008, 01:28 PM
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God this running out buisness makes the rounds every couple decades for centuries. I know, 'this time' it's for real. Better start hoarding those pennies!
Old Feb 10, 2008, 01:29 PM
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dont know what or how soon ---juist one day we will run out

Humans survived all of them with rocks and bone tools,

now thats the human spirit!!!
Last edited by supertiga; Feb 10, 2008 at 01:36 PM.
Old Feb 10, 2008, 01:46 PM
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When the land bridge opened up in Panama/Central America ..(not that terribly long ago).. from the water receding, the invasion of North American animal species eliminated (replaced) 98% of the native creatures... Believe it or not this was all accomplished without a chainsaw or a bible.
jimbo


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