Contributed speaker: Geodynamo behaviour on multimillion to billion year timescales: insights from palaeomagnetic records

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• Andy Biggin (University of Liverpool)
• Friday 02 December 2022, 11:45-12:15
• Seminar Room 1, Newton Institute.

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DY2W03 - Modeling, observing and understanding flows and magnetic fields in the Earth's core and in the Sun

Earth’s magnetic field has left a signature of its properties in rocks as they have formed at the surface through the last 3.5 billion years. Strong variations in paleomagnetic field behaviour evident on timescales exceeding ten million years have the potential to elucidate core and mantle processes through their impact on time-averaged outer core convection. Here I will report on efforts led by the DEEP (Determining Earth Evolution from Palaeomagnetism) group at Liverpool to realize this potential through obtaining and collating palaeomagnetic measurements and capturing and reproducing these datasets in global models of outer core convection. Recent insights into such globally significant events as the near collapse at the end of the Precambrian will be outlined.

This talk is part of the Isaac Newton Institute Seminar Series series.

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