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http://www.dailymail.co.uk/sciencet...arth-late-19th-century.html?ito=feeds-newsxml
Four huge volcanic eruptions triggered a 'Little Ice Age' that cooled earth for hundreds of years until the late 19th century, say scientists.
The period of cooling led to famous events such as people ice skating on the River Thames.
A study at the University of Colorado analysed sediment cores, vegetation and ice, and revealed that four massive tropical volcanic eruptions between 1275 and 1300AD triggered the period of cooling.
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Worth noting:
That's effectively what we have happening now to the Arctic and Antarctic ice sheets, they're melting, causing eventual loss of heat to the northern and southern latitudes. Whether you believe in global warming or not, its happening, the ice melting that is.
What's interesting is that there is an interesting theory out there floating around in the ether that global warming may become global cooling in as little as 50-75 years from now. If the so-called global conveyor belt of warm water and cold water flow patterns in the Atlantic are disrupted as it surely will happen, you have a chance for the extreme northern and southern latitudes to experience a lack of warm water return. You could end up with glacier growth, off-setting carbon dioxide's effects to the atmosphere.
It's a pretty interesting feedback loop that some climatologists say could mitigate the green house effect, or provide an amplification scenario whereby Mother Nature overshoots things a bit and we end up colder than we guess, but then return back to hotter.
Four huge volcanic eruptions triggered a 'Little Ice Age' that cooled earth for hundreds of years until the late 19th century, say scientists.
The period of cooling led to famous events such as people ice skating on the River Thames.
A study at the University of Colorado analysed sediment cores, vegetation and ice, and revealed that four massive tropical volcanic eruptions between 1275 and 1300AD triggered the period of cooling.
-------------------------------------------
Worth noting:
The model showed that sustained cooling from volcanoes would have sent some of the expanding Arctic sea ice down along the eastern coast of Greenland until it eventually melted in the North Atlantic.
Since sea ice contains almost no salt, when it melted the surface water became less dense, preventing it from mixing with deeper North Atlantic water.
That's effectively what we have happening now to the Arctic and Antarctic ice sheets, they're melting, causing eventual loss of heat to the northern and southern latitudes. Whether you believe in global warming or not, its happening, the ice melting that is.
What's interesting is that there is an interesting theory out there floating around in the ether that global warming may become global cooling in as little as 50-75 years from now. If the so-called global conveyor belt of warm water and cold water flow patterns in the Atlantic are disrupted as it surely will happen, you have a chance for the extreme northern and southern latitudes to experience a lack of warm water return. You could end up with glacier growth, off-setting carbon dioxide's effects to the atmosphere.
It's a pretty interesting feedback loop that some climatologists say could mitigate the green house effect, or provide an amplification scenario whereby Mother Nature overshoots things a bit and we end up colder than we guess, but then return back to hotter.