For years, AGW believers have been screaming that NEVER BEFORE in the HISTORY OF THIS PLANET, has the earth warmed up this quickly and I’ve been saying all along to them that we don’t have the technology to be able to tell that. But they’ve kept insisting I don’t know what I’m talking about and that we do have the technology and that ice core data is undeniable proof that the world is warming far quicker than ever before in it’s billions-year-old history.
Turns out that I was right. Me. Just an inconspicuous, little, uneducated nobody who knew darned well that there was no way in the world we are able to ascertain with 100% certainty, through ice core data, what the climate has been doing for billions of years.
Well, apparently, scientists have only been able to find ice-core data that goes back 800,000 to 1,300,000 years. Ice core drilling is what they use to reconstruct a climatic record (as well as CO2 concentrations) over the age range of the core, normally through isotopic analysis. Considering that the earth is billions of years old, this meagre range is hardly enough to give conclusive evidence to somehow support the AGW theory. So, once again, common sense and logic trumped AGW rhetoric and propaganda. — DQ
How far into the past can ice-core records go? Scientists have now identified regions in Antarctica they say could store information about Earth’s climate and greenhouse gases extending as far back as 1.5 million years, almost twice as old as the oldest ice core drilled to date. The results are published today in Climate of the Past, an open access journal of the European Geosciences Union (EGU).
By studying the past climate, scientists can understand better how temperature responds to changes in greenhouse-gas concentrations in the atmosphere. This, in turn, allows them to make better predictions about how climate will change in the future.
“Ice cores contain little air bubbles and, thus, represent the only direct archive of the composition of the past atmosphere,” says Hubertus Fischer, an experimental climate physics professor at the University of Bern in Switzerland and lead author of the study. A 3.2-km-long ice core drilled almost a decade ago at Dome Concordia (Dome C) in Antarctica revealed 800,000 years of climate history, showing that greenhouse gases and temperature have mostly moved in lockstep. Now, an international team of scientists wants to know what happened before that.
At the root of their quest is a climate transition that marine-sediment studies reveal happened some 1.2 million years to 900,000 years ago. “The Mid Pleistocene Transition is a most important and enigmatic time interval in the more recent climate history of our planet,” says Fischer. The Earth’s climate naturally varies between times of warming and periods of extreme cooling (ice ages) over thousands of years. Before the transition, the period of variation was about 41 thousand years while afterwards it became 100 thousand years. “The reason for this change is not known.”