000006650 001__ 6650
000006650 005__ 20240124200004.0
000006650 037__ $$aCTALK-2024-0023
000006650 100__ $$aYan, Chi
000006650 245__ $$aProbing Mars’ Ancient Magnetic Mysteries with Full Sphere Dynamo Simulations
000006650 260__ $$c2023
000006650 269__ $$c2023-12-13
000006650 500__ $$aGP24A-04
000006650 520__ $$aThe magnetic data returned by the Mars Global Surveyor revealed a hemispherical crustal magnetic field most likely implying Martian dynamo action in its early history. Theories for the origin of the hemispherical dichotomy vary, including hydrothermal events, shock demagnetization and hemispherical dynamo action. Recent seismic measurements from the NASA Mars InSight mission revealed that Mars’ core has a relatively low density, implying the absence of a solid inner core throughout Mars’ history. Here we perform full sphere dynamo simulations to investigate the potential effect of dynamo action in a full sphere geometry on the creation of a hemispherical magnetic field. We find full sphere dynamos produce magnetic fields that are more hemispheric than models with small inner cores, with the same heat flux perturbations at the core mantle boundary. These studies should provide insights to Mars’ material properties in the interior, thermal histories and core evolution.
000006650 536__ $$a3PRODPLANINT/$$c3PRODPLANINT/$$f3PRODPLANINT
000006650 594__ $$aNO
000006650 700__ $$aBarik, Ankit
000006650 700__ $$aStanley, Sabine
000006650 700__ $$aPlesa, Ana-Catalina
000006650 700__ $$aRivoldini, Attilio
000006650 700__ $$aMittelholz, Anna
000006650 700__ $$aJohnson, Catherine
000006650 773__ $$tAGU 2023 San Fransisco
000006650 8560_ $$fattilio.rivoldini@ksb-orb.be
000006650 85642 $$ahttps://agu.confex.com/agu/fm23/meetingapp.cgi/Paper/1306076
000006650 906__ $$aInvited
000006650 980__ $$aCTALKINVI