Konvektion und Corioliskraft führen zu komplizierten Strömungen im Erdinneren, die das Erdmagnetfeld verursachen. Das wäre ohne Nickel in dieser Form nicht möglich.
Scientists at TU Wien and Würzburg University are changing our idea of the earth's magnetic field: iron alone cannot explain the concept of the geodynamo. The crucial ingredient is nickel. It only takes a simple compass to demonstrate that the earth has a magnetic field - but it is quite difficult to explain how exactly it is created. Without any doubt, our planet's hot core, consisting mainly of iron, plays an important part. In combination with the earth's rotation, it builds up a powerful "dynamo effect", which creates a magnetic field. But with iron alone, this effect cannot be explained. A team of researchers, led by Prof. Alessandro Toschi and Prof. Karsten Held (TU Wien) and Prof. Giorgio Sangiovanni (Würzburg University) has now published calculations in the journal "Nature Communications", which show that the theory of the geodynamo has to be revised.
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