Posted 10 years ago on April 2, 2012, 3:53 a.m. EST by F350
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- Manmade Global Warming Refuted by New Study.....
Skeptics of manmade global warming claims can bolster their position with a new study showing that the Earth went through a previous warming period not caused by human CO2 emissions.
The Intergovernmental Panel on Climate Change has argued that the Medieval Warm Period approximately 500 to 1,000 years ago was confined to Europe and did not affect the entire planet, “which means the worldwide warming we’re experiencing now is a manmade phenomenon,” the Daily Mail observed.
But a team of scientists led by geochemist Zunli Lu from Syracuse University in New York found the warming was not confined to Europe and actually extended all the way down to Antarctica, affecting the entire planet. The finding indicates that “the Earth has already experienced global warming without the aid of human CO2 emissions,” according to the Mail.
Following that period, the Earth cooled down naturally and there was even a “mini ice age.”
Professor Lu’s study — published in the journal Earth and Planetary Science Letters — relies on a rare mineral called ikaite, an icy version of limestone that forms in cold waters. The water that holds crystals of ikaite together traps information about temperatures present when the crystals were formed.
Lu’s team studied ikaite crystals from sediment cores drilled off the coast of Antarctica, and the crystals showed that the Medieval Warm Period and Little Ice Age extended to Antarctica.