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Scientists Confirm Historic Massive Flood in Climate Change

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Adam Hawthorne
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« on: May 04, 2008, 02:33:40 am »

Scientists Confirm Historic Massive Flood in Climate Change
Feb. 28, 2006

Scientists from NASA and Columbia University, New York, have used computer modeling to successfully reproduce an abrupt climate change that took place 8,200 years ago. At that time, the beginning of the current warm period, climate changes were caused by a massive flood of freshwater into the North Atlantic Ocean.

 Image to right: Circulation patterns in the North Atlantic Ocean. Cold, dense water is shown in blue, flowing south from upper latitudes, while warm, less dense water flows north. Click image to enlarge. Credit: Jack Cook for Ocean and Climate Change Institute, Woods Hole Oceanographic Institution.

This work is the first to consistently recreate the event by computer modeling, and the first time that the model results have been confirmed by comparison to the climate record, which includes such things as ice core and tree ring data.

"We only have one example of how the climate reacts to changes, the past," said Gavin A. Schmidt, a NASA Goddard Institute for Space Studies (GISS), New York, researcher and co-author on the study. "If we're going to accurately simulate the Earth's future, we need to be able to replicate past events. This was a real test of the model's skill."

The study was led by Allegra LeGrande, a graduate student in the department of Earth and Environmental Sciences at Columbia University. The results appeared in the journal Proceedings of the National Academy of Sciences (PNAS) in January 2006.

The group used an atmosphere-ocean coupled climate computer model known as "GISS Model E-R" to simulate the climate impact of a massive freshwater flood into the North Atlantic that happened about 8,200 years ago after the end of the last Ice Age. Retreating glaciers opened a route for two ancient meltwater lakes, known as Agassiz and Ojibway, to suddenly and catastrophically drain from the middle of the North American continent.

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Adam Hawthorne
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« Reply #1 on: May 04, 2008, 02:34:16 am »

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Adam Hawthorne
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« Reply #2 on: May 04, 2008, 02:35:56 am »



Image above: This is a GISS Model simulation of the 8,200 year climate response to freshwater entering into the Hudson Bay. Panels (a) and (b) show the model's simulated changes in surface air temperature and precipitation, respectively.
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Adam Hawthorne
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« Reply #3 on: May 04, 2008, 02:37:03 am »

Credit: NASA GISS

At approximately the same time, climate records show that the Earth experienced its last abrupt climate shift. Scientists believe that the massive freshwater pulse interfered with the ocean's overturning circulation, which distributes heat around the globe. According to the record of what are known as "climate proxies", average air temperatures apparently fell as much as several degrees in some areas of the Northern Hemisphere.

Climate researchers use these proxies, chemical signals locked in minerals and ice bubbles as well as pollen and other biological indicators, as indirect measures of temperature and precipitation patterns in the distant past. Because GISS Model E-R incorporates the response of these proxies in its output, the authors of the PNAS study were able to compare their results directly to the historical record.

The researchers prodded their model with a freshwater flow equal to between 25 and 50 times the flow of the Amazon River in 12 model runs that took more than a year to complete. Although the simulations largely agreed with records from North Atlantic sediment cores and Greenland ice cores, the team's results showed that the flood had much milder effects around the globe than many people thought.

According to the model, temperatures in the North Atlantic and Greenland showed the largest decrease, with slightly less cooling over parts of North America and Europe. The rest of the northern hemisphere, however, showed very little effect, and temperatures in the southern hemisphere remained largely unchanged. Moreover, ocean circulation, which initially dropped by half after simulated flood, appeared to rebound within 50 to 150 years.

"The flood we looked at was even larger than anything that could happen today," said LeGrande. "Still, it's important for us to study because the real thing occurred during a period when conditions were not that much different from the present day."

The GISS climate model is also being used for the latest simulations by the Intergovernmental Panel on Climate Change (IPCC) to simulate the Earth's present and future climate. "Hopefully, successful simulations of the past such as this will increase confidence in the validity of model projections," said Schmidt.

The study was funded by NASA, National Defense Science and Engineering Graduate Fellowship, and the National Science Foundation.

Also See
GISS Science Brief: Modeling an Abrupt Climate Change

Reference
LeGrande, A.N., G.A. Schmidt, D.T. Shindell, C.V. Field, R.L. Miller, D.M. Koch, G. Faluvegi, and G. Hoffmann 2006. Consistent simulations of multiple proxy responses to an abrupt climate change event. Proc. Natl. Acad. Sci. 103, 837-842, doi:10.1073pnas.0510095103.
Schmidt, G.A., and A.N. LeGrande 2005. The Goldilocks abrupt climate change event. Quaternary Sci. Rev. 24, 1109-1110, doi:10.1016/j.quascirev.2005.01.015.
Media Contact

Robert Gutro, NASA Goddard Space Flight Center

http://www.giss.nasa.gov/research/news/20060228/
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Mario Dantas
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« Reply #4 on: May 05, 2008, 04:59:01 am »


Hi Adam,

I wonder whether the "mud", stated by Critias is taken into account.

Quote
average air temperatures apparently fell as much as several degrees in some areas of the Northern Hemisphere.

Huge Ice on North? stealing temperature as they melt and reaching the chill further on. like in a microwave, liquid water is needed for bodies be able to gain (or lose temperature), therefore, when the rock hard Ice melted, it acted like a freezer over the Crust. Today's Ice are the remnants of a past Ice Age, that ended, probably, within Atlantis "vanishing" event. 

The article also states that the Sea level rose considerably, so it can be assumed that it could in fact have been totally submerged by liquid water, starting the Oral Tradition of a sunken Island.

M
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HereForNow
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HUH?


« Reply #5 on: May 07, 2008, 08:02:55 am »

Hmmm, which the same result that you are descibing could occur if there was a sudden crustal shift that could have been produced by shock waves from magnetic changes in the Earth itself. This in turn would cause climate changes.

The disorderly-flip theory is supported by evidence from geology that in past reversals the decline was not total. Lava flows that solidified at Steen's Mountain during a lengthy reversal process show that the magnetic poles wandered across the equator three times. Though strength of the field was reduced to about 20% of maximum, there is no record that it fell to zero gauss during that transitional period.

The theory that activity in the turbulent molten outer iron core of the planet generates its magnetic field currently dominates scientific thinking. Stormy activity deep in the earth's outer core, believed to be filled with roiling convection flows of molten iron, is understood to generate the planet’s magnetic field. Such violent seething could affect the mantle as well, possibly disturbing the earth's crust and causing the quakes and sometimes sudden movement of the crust.

« Last Edit: May 07, 2008, 08:05:21 am by HereForNow » Report Spam   Logged

BlueHue
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« Reply #6 on: May 30, 2008, 01:46:05 pm »

Dear mr HAWTHORNE:
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( Blue's)THEORY, locating"original" Atlantis( in Aden-Yemen.)
1: ATLANTIS =Fake=Latin name, original Greek: ATHE(=a Region in Aden)
2: Atlantic-OCEAN=Greek: RIVER-of-Atlas+also" Known "World-OCEAN(=Red-Sea)
3: Greek-obsolete-Numeral 'X' caused Plato's Atlantisdate:9000=900
Qoais
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« Reply #7 on: May 31, 2008, 01:00:15 am »

Read the research at this link:

http://www.universal-flood.net/Chart.html
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An open-minded view of the past allows for an unprejudiced glimpse into the future.

Logic rules.

"Intellectual brilliance is no guarantee against being dead wrong."
Nerc
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« Reply #8 on: June 02, 2008, 06:51:24 am »

everyone seems quite content to discuss the huge glacial lakes that formed over north america and asia but whats with the brainfart? there was more glacier.

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BlueHue
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« Reply #9 on: June 03, 2008, 09:53:50 am »

Read the research at this link:

http://www.universal-flood.net/Chart.html

Dear  . . . NERC   +...........QUOAIS,

this chart covers 8.000/ 2.000 bc,
but the Atlantis Flood(-s) in my opinion were:
1075( Phoroneus)/1055 bc (=Titano-machia + DEUKALION )/
1005 bc ( King  David's " Pest" =Flood.)  955 bc ( Perseus/Andromeda's Flood.)
855 bc (Giganto-machia +Ogygos-Flood that caught Atlantis.)
705 bc Flood mentioned by Salmanasser-5, 689 bc Flood mentioned by Sanherib.)

The above " Floods" were caused as Salmanasser-3 thought by the White Elephant so he had them killed
The White Elephant was an Avatar of the Moon, Moon Mars Earth conjunctions causes Earthquakes even today

Paleontologists noticed that around 855 bc the race of White -arabian-Elephant ( Elephas Maximus- Asyrus.)became extinct but they never linked it to the Assyrian king Salmanasser-3 as the murder-cause. It's a real detective-Story !

Sincerely " BlueHue " dd 3 June-2008 Cry  Cry  Cry
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( Blue's)THEORY, locating"original" Atlantis( in Aden-Yemen.)
1: ATLANTIS =Fake=Latin name, original Greek: ATHE(=a Region in Aden)
2: Atlantic-OCEAN=Greek: RIVER-of-Atlas+also" Known "World-OCEAN(=Red-Sea)
3: Greek-obsolete-Numeral 'X' caused Plato's Atlantisdate:9000=900
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