The Ice Age Driver Found?
Published 18 June 2009 on ABC Pool, see here (Got the date wrong on the image above, having lost track of the days, while out in hyperspace, tracking ice ages)
Geologists have been puzzled for at least 200 years, about what drives the ice ages and the warm periods between them.
Here, perhaps first up on ABC Pool, is the answer. Geomagnetism. The composite graph shows a very clear link - if you are used to the imperfections of geological data. The hard yards were done by folk at sea on rolling research vessels, drilling ice cores in the sub-zeros, freezing in labs and tapping other plastic buttons. Ta all and very well done .
The fits are not perfect, but one would be concerned if they were. Each of the three records, the stacked marine sediment one used for temperature proxies, those used separately for gauging the past magnetic field intensity of the planet, and the deep ice core record from Dome C in Antarctica, are subject to gaps and repeats, from both geological faulting and from unavoidable interpretive error.
But the fit is god enough to be able to say that either global temperatures and the global magnetic field intensity are in step, for some external reason or, and I think this is more likely, that the deep geomagnetic field shifts are driving the temperature changes, that is, they are driving climate change, on this time-scale. Those shifts are believed to derive from the core-mantle boundary, some 2,880 kms down, on average. Too deep for Holdens, as said before. Someone go polish the two Pennys*
As the maps posted on Pool earlier show, the geomagnetic field shifts are also driving, or co-linked to temperature changes in the past fifty years, and carbon dioxide emissions cannot, for geographical reasons, be driving climate change. I think it is hence now fair to say that the anthropogenic greenhouse warming model of climate change, of the IPCC, governments all over including Australia, and of climate alarmists such as Al Gore, Ross Garnaut, Tim Flannery, etc,. Is dead in the water,
Have fun folks, it is no longer illegal. The climate is changing anyway as it always has, this interglacial peak is perfectly normal, see my previous posts, and our carbon emission, though they must be trimmed anyway, are quite irrelevant to climate change.
If still not convinced, good for you, this lot needs a lot of thought yet.
,*Penny Wong, Minister in Command of Changing the Climate, and Penny Sackett, Chief Australian Government Scientist ,(see this for a short ditty for light relief)