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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Contributed talk: A global paleomagnetic view on e
 xcursions and reversals - Monika Korte (GFZ German
  Research Centre for Geosciences)
DTSTART;TZID=Europe/London:20221130T114500
DTEND;TZID=Europe/London:20221130T121500
UID:TALK192122AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/192122
DESCRIPTION:The fact that the geodynamo has reversed multiple 
 times over Earth's history is well established. Ho
 wever\, details of the process remain poorly under
 stood. Despite a steadily growing amount of paleom
 agnetic data\, there are gaps in global coverage a
 nd inherent limitations exist concerning accuracy 
 and temporal resolution of these data. The full gl
 obal understanding not only of polarity reversals 
 (including short-lived excursions)\, but of the lo
 ng-term field evolution in general remains incompl
 ete. &nbsp\;I present results of recent efforts to
  reconstruct the global geomagnetic field evolutio
 n over the past 100 000 years\, with a particular 
 focus on the field exursions that occurred within 
 this interval when the field lost its dipole domin
 ance\, and of the global field evolution over the 
 200 000 years surrounding the last full polarity r
 eversal. The new spherical harmonic inverse models
  of these events can conveniently be used for dire
 ct comparisons of field characteristics to dynamo 
 simulation runs\, but implicit model uncertainties
  should not be neglected.&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:
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