Watermelons (green on the outside and red on the inside) had glommed onto the climate chaos hypothesis as a tool to hammer home their collectivist, illiberal agenda on an unsuspecting public, and now they're mad because it seems to be unraveling. People are not buying it. CGHCCC high priest Al Gore continues to glurge, and Pope Obama has declared a war on skeptics.
The world's most viewed site on global warming and climate change, Watts Up With That (WUWT) has published an article, New ideas on Antarctic ice sheet formation subtitled, "scientists cast doubt on theory of what triggered Antarctic glaciation".
A team of U.S. and U.K. scientists has found geologic evidence that casts doubt on one of the conventional explanations for how Antarctica’s ice sheet began forming. Ian Dalziel, research professor at The University of Texas at Austin’s Institute for Geophysics and professor in the Jackson School of Geosciences, and his colleagues report the findings today in an online edition of the journal Geology.
The Antarctic Circumpolar Current (ACC), an ocean current flowing clockwise around the entire continent, insulates Antarctica from warmer ocean water to the north, helping maintain the ice sheet. For several decades, scientists have surmised that the onset of a complete ACC played a critical role in the initial glaciation of the continent about 34 million years ago.
Now, rock samples from the central Scotia Sea near Antarctica reveal the remnants of a now-submerged volcanic arc that formed sometime before 28 million years ago and might have blocked the formation of the ACC until less than 12 million years ago. Hence, the onset of the ACC may not be related to the initial glaciation of Antarctica, but rather to the subsequent well-documented descent of the planet into a much colder “icehouse” glacial state.