Citing Surendra Adhikari at NASA, I would like to ask how it is possible to claim that the North Pole drift is caused by climate change:
"Climate change does not only cause the rise of the oceans, it also disturbs the magnetic field of the Earth. "There has been a dramatic change in the direction of pole drift, undoubtedly caused by climate change, which is linked to the disappearance of the ice sheets, especially in Greenland," said Surendra Adhikari, researcher at the NASA. The North Pole has lost 278 gigatonnes of ice since the beginning of the third millennium. As a result, the magnetic north pole moves eastward, and faster than before. The melting of ice would account for 66% in the acceleration of the phenomenon."
The magnetic pole drift is caused by the magnetic field strength of the North American flux lobe and the Siberian flux lobe (Ref: 1, 2, Figure 1). This is also based on a comparison with the magnetic South Pole in Antarctica, which is immobile and entirely surrounded by ocean, while the magnetic North Pole is driven by continental mineral density of the two major continents forming large magnetic fields. These mineral densities of the Siberian and Canadian regions are fluctuating with the activity of the internal core and the rotation of the iron core of the earth, seismic activity and change in mineral composition of the mantel over several years. The geomagnetic properties of these region can change drastically by the alterations of the electromagnetic field of the planet Earth, which is also affected by the electromagnetic field of the Sun. How can NASA claim that the North pole ice, which is virtually the same as water around Antarctica in magnitude of electromagnetic strength, alter the position of the magnetic North Pole?
References.
1. Gubbins, David, and Peter Kelly. "Persistent patterns in the geomagnetic field over the past 2.5 Myr." Nature 365.6449 (1993): 829.
2. St-Onge, Guillaume, and Joseph S. Stoner. "Paleomagnetism near the north magnetic pole: a unique vantage point for understanding the dynamics of the geomagnetic field and its secular variations." Oceanography 24.3 (2011): 42-50.
278 gigatonnes of ice. Could that intermediatly affect the continental mineral density? It is really a huge mass. And the climate underneath or around the ice no matter on the ground or under the sea would be largely affected. But I also can't come up with a direct connection between them. I am more curious about what would be influenced by the drift of the north pole. E.g., will biosystems using the geomagnetic field information largely affected？
The main flux lobes have been Siberia and Canada in the last million years. Greenland must have an affect also. But we are here talking about a loss of pressure on the Greenland continent by melting of ice, and therefore we can assume expansion of the cracks of the rock, but no change in the mineral atomic structure and not in the lattice structures of the minerals. Therefore, the bonding of the minerals in the Greenland continent remains the same. When the bonding is the same, its magnetic properties are also the same. There is therefore no reason for why the melting of the ice on the Greenland continent should alter the focusing effects of earth magnetism on the Greenalnd continent: It should be exactly the same.
It is rather possible that the Suns magnetic field is directly altering this focalization of the magnetic North Pole, by changes in the Suns dynamo:
Imagine two adjacent electromagnetic fields emitted by two electric sources A and B. Assume that A is far stronger than B, and now you start altering its intensity slightly. The vortices and field lines of the magnetic field of A will change during the change in magnetic field of object A.
Consider then the magnetic interaction between A and B, will that change too?
If it does, will the magnetic fields on B also fluctuate?
Consider then that A is the sun and B is earth. Will we notice a difference in North Pole drift occasionally during the solar evolution?
Thanks for your answer!
Consider the anomaly of the magnetic North Pole during the warmest period in the last 3000 years, 1000 B.C. The North Pole moved from East Siberia nearly to the coast off California, an anomaly that subsided some 4 centuries later, when the temperatures started normalizing again.
From
Catherine G. Constable1, Catherine L. Johnson2 and Steven P. Lund3. "Global geomagnetic field models for the past 3000 years: transient or permanent flux lobes?" Phil Trans. R. Soc. Lond. A (2000) 358
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