HR: 12:10h
AN: T31G-07    [PDF]
TI: The Effects of Radiogenic Heating in Geodynamo Simulation
AU: * Ogden, D E
EM: dogden@es.ucsc.edu
AF: Earth Sciences Department University of California at Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 United States
AU: Glatzmaier, G A
EM: glatz@es.ucsc.edu
AF: Earth Sciences Department University of California at Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 United States
AB: Recent studies have suggested that potassium-40 may be present in the Earth's fluid outer core. The presence or absence of this radiogenic isotope may have an effect on magnetic field generation. This study examines the consequences of radiogenic heating on the character of a simulated magnetic field. The Glatzmaier-Roberts geodynamo model is used to test the effect of different levels of radiogenic heating with both homogeneous and tomographic core mantle boundary (CMB) heat flux conditions. Zero to fifty percent of the simulated CMB heat flux is generated by radiogenic heating. The total heat flow through the CMB is prescribed to be the same total amount in every case. Preliminary results show variation in the velocity, magnetic field, and temperature structures in the different cases.
DE: 1507 Core processes (8115)
DE: 1510 Dynamo theories
DE: 3210 Modeling
DE: 5430 Interiors (8147)
DE: 8115 Core processes (1507)
SC: Tectonophysics [T]
MN: 2003 Fall Meeting