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According to archaeological finds, the city of Cahokia was inhabited from about A.D. 700 to 1400. At its peak, from A.D. 1100 to 1200, the city covered nearly six square miles. Houses were arranged in rows and around open plazas, and the main agricultural fields lay outside the city. The site is named for a subtribe of the Illini - the Cahokia - who occupied the area when the French arrived. Archaeological investigations and scientific tests have provided what is known of the once-thriving community.
The fate of the prehistoric Cahokians and their city is unknown. Depletion of resources probably contributed to the city's decline. A climate change after A.D. 1200 may have affected crop production and the plant and animal resources needed to sustain a large population. War, disease, social unrest, and declining political and economic power may have also taken their toll. A gradual decline in population began sometime after A.D. 1200, and by the 1400s, the site had been abandoned.
Originally posted by ElectricUniverse
reply to post by damwel
There is a big difference between the Global wArming hoax, and CLimate Change... But of course people like you are so ignorant about this issue that you think both are one and the same...
An article from a NEWSPAPER that is known to spouse the GREEN agenda is no proof that mankind is the cause of Climate change...
Yes, NATURAL Climate Change has brought down past civilizations...including native American civilizations which were living off the land thousands of years ago, and even more recent around 1,200 A.D.... oh wait, unless they were using SUVs and then that's the reason they cause Climate Change....
According to archaeological finds, the city of Cahokia was inhabited from about A.D. 700 to 1400. At its peak, from A.D. 1100 to 1200, the city covered nearly six square miles. Houses were arranged in rows and around open plazas, and the main agricultural fields lay outside the city. The site is named for a subtribe of the Illini - the Cahokia - who occupied the area when the French arrived. Archaeological investigations and scientific tests have provided what is known of the once-thriving community.
The fate of the prehistoric Cahokians and their city is unknown. Depletion of resources probably contributed to the city's decline. A climate change after A.D. 1200 may have affected crop production and the plant and animal resources needed to sustain a large population. War, disease, social unrest, and declining political and economic power may have also taken their toll. A gradual decline in population began sometime after A.D. 1200, and by the 1400s, the site had been abandoned.
www.cr.nps.gov...
Climate Change has occurred many times, and even entire civilizations had to leave entire regions due to these Climate Changes. Many people suffere,d and many died because of this, and wars ensued between tribes trying to survive.
Natural Climate Change has happened many times in the past, and it is now also happening, but mankind has nothing to do with it.
Originally posted by halfmanhalfamazing
You must be living in a box... Yes there were climate changes before... EVERYONE KNOWS THAT!
The point is that we are causing EVEN MORE harm than the natural cycle would have...
The concentration of Greenhouse gasses are the highest its been is 600000 years... 800 tonns per second due to human activity!
These gasses trap incoming solar radiation which obviously causes the temprature to increase!
You should motivating people to be protect the planet.
[edit on 20-7-2009 by halfmanhalfamazing]
Oceanic Influences on Recent Continental Warming
GILBERT P. COMPO
PRASHANT D. SARDESHMUKH
Climate Diagnostics Center,
Cooperative Institute for Research in Environmental Sciences,
University of Colorado, and
Physical Sciences Division, Earth System Research Laboratory,
National Oceanic and Atmospheric Administration
325 Broadway R/PSD1
Boulder CO 80305-3328
[email protected]
(303) 497-6115
(303) 497-6449
Citation:
Compo, G.P., and P.D. Sardeshmukh, 2008: Oceanic influences on recent continental warming. Climate
Dynamics, doi: 10.1007/s00382-008-0448-9.
This article is published by Springer-Verlag. This author-created version is distributed courtesy of Springer-Verlag.
The original publication is available from www.springerlink.com at
www.springerlink.com...
Abstract
Evidence is presented that the recent worldwide land warming has occurred largely in response to a worldwide warming of the oceans rather than as a direct response to increasing greenhouse gases (GHGs) over land.
Atmospheric model simulations of the last half-century with prescribed observed ocean temperature changes, but without prescribed GHG changes, account for most of the land warming. The oceanic influence has occurred through hydrodynamic-radiative teleconnections, primarily by moistening and warming the air over land and increasing the downward longwave radiation at the surface. The oceans may themselves have warmed from a combination of natural and anthropogenic influences.
Current warmth seems to be occurring nearly everywhere at the same time and is largest at high latitudes in the Northern Hemisphere. Over the last 50 years, the largest annual and seasonal warmings have occurred in Alaska, Siberia and the Antarctic Peninsula. Most ocean areas have warmed. Because these areas are remote and far away from major cities, it is clear to climatologists that the warming is not due to the influence of pollution from urban areas.
Originally posted by ElectricUniverse
Originally posted by halfmanhalfamazing
You must be living in a box... Yes there were climate changes before... EVERYONE KNOWS THAT!
The point is that we are causing EVEN MORE harm than the natural cycle would have...
The concentration of Greenhouse gasses are the highest its been is 600000 years... 800 tonns per second due to human activity!
These gasses trap incoming solar radiation which obviously causes the temprature to increase!
You should motivating people to be protect the planet.
[edit on 20-7-2009 by halfmanhalfamazing]
.
I am not asking for CLAIMS, but PROOF.....
Water vapour is more of a greenhouse gas than CO2...
Originally posted by grover
consumerism is a tacky excuse for a culture anyway.
If climate change doesn't get us...population outstripping food production will (brought down many a civilization in the past) and if that doesn't do it depleting our resources will...
And failing that wallowing in our own wastes aka pollution will do the trick...
Its just a question of when and how...
BUT the next big question is what comes after?
www.in dependent.co.uk
(visit the link for the full news article)
The point is that we are causing EVEN MORE harm than the natural cycle would have...
The concentration of Greenhouse gasses are the highest its been is 600000 years... 800 tonns per second due to human activity!
You should motivating people to be protect the planet.
If climate change doesn't get us...population outstripping food production will (brought down many a civilization in the past) and if that doesn't do it depleting our resources will...
And failing that wallowing in our own wastes aka pollution will do the trick...
What do you expect?
Some of these loons don't think that animals adapting to changing conditions is evolution either.
Americans are so incredibly ignorant of what science is and is not that they think all they have to do is sound like "science" makes it so.
No one ever said the warming of the planet would be even or consistent just that the overall average would rise, which it has.