These scientists also believe that the cause of these high global temperatures is brought on by periodic Magnetic Shifting of the Earth's poles... Those geomagnetic jerks!!!!!!
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The North Magnetic Pole has moved 1,300 kilometers northwest since James Clark Ross first reached the pole in 1831. At its current trajectory and newly calculated speed of 40 kilometers per year, the North Magnetic Pole will reach Siberia by the year 2050...
http://www.geotimes.org/may02/NN_pole.html
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The information you refer to is precicely where I am coming from. These drastic polar shifts are evident throughout the Earth's history. It may also be one of the reasons for so many drastic weather changes. (i.e. unusual warm winter temperatures in Alaska in such a sudden fashion.)