More Proof Global Warming Isn’t Man-Caused: Medieval Warm Period Affected Antarctica Too
And yet another nail in the coffin of anthropogenic global warming:
A team of scientists led by geochemist Zunli Lu from Syracuse University in New York state, has found that contrary to the ‘consensus’, the ‘Medieval Warm Period’ approximately 500 to 1,000 years ago wasn’t just confined to Europe.
The Medieval Warm Period is a real problem for AGW True Believers, because it’s so far before the Industrial Revolution that the warming couldn’t have been caused by human activity. Up until now, their “out” was that the Medieval Warm Period was only a European phenomenon, but now this study is shooting that theory full of holes.
However, Professor Lu has shown that this isn’t true – and the evidence lies with a rare mineral called ikaite, which forms in cold waters.
‘Ikaite is an icy version of limestone,’ said Lu. ‘The crystals are only stable under cold conditions and actually melt at room temperature.’
It turns out the water that holds the crystal structure together – called the hydration water – traps information about temperatures present when the crystals formed.
This finding by Lu’s research team establishes, for the first time, ikaite as a reliable way to study past climate conditions.
In other words, the “hydration water” is like a mineral version of a tree ring. And what it shows is good news for AGW skeptics, and very bad news for AGW True Believers:
The scientists were particularly interested in crystals found in layers deposited during the ‘Little Ice Age,’ approximately 300 to 500 years ago, and during the Medieval Warm Period before it.
Both climate events have been documented in Northern Europe, but studies have been inconclusive as to whether the conditions in Northern Europe extended to Antarctica.
Lu’s team found that in fact, they did.
They were able to deduce this by studying the amount of heavy oxygen isotopes found in the crystals.
During cool periods there are lots, during warm periods there aren’t.
So, we now know that the Medieval Warm Period happened in Antarctica as well. Given the distance between the two, it seems likely that the Medieval Warm Period went a lot further than current AGW theories claim.
Were there people in Antarctica in the Middle Ages burning fossil fuels to cause the warming? I think not.