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SUMMARY:Contributed speaker: Geodynamo behaviour on multimillion to billio
 n year timescales: insights from palaeomagnetic records - Andy Biggin (Uni
 versity of Liverpool)
DTSTART:20221202T114500Z
DTEND:20221202T121500Z
UID:TALK192167@talks.cam.ac.uk
DESCRIPTION:Earth&rsquo\;s magnetic field has left a signature of its prop
 erties in rocks as they have formed at the surface through the last 3.5 bi
 llion years. Strong variations in paleomagnetic field behaviour evident on
  timescales exceeding ten million years have the potential to elucidate co
 re and mantle processes through their impact on time-averaged outer core c
 onvection. Here I will report on efforts led by the DEEP (Determining Eart
 h Evolution from Palaeomagnetism) group at Liverpool to realize this poten
 tial through obtaining and collating palaeomagnetic measurements and captu
 ring and reproducing these datasets in global models of outer core convect
 ion. Recent insights into such globally significant events as the near col
 lapse at the end of the Precambrian will be outlined.
LOCATION:Seminar Room 1\, Newton Institute
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