The influence of potassium on core and geodynamo evolution

By F. Nimmo, G. D. Price, J. Brodholt, David Gubbins. 2003

182 citations recorded by the source corpus.

Subfields: Astronomy and Astrophysics, Molecular Biology, Oceanography

View Paper: https://www.semanticscholar.org/paper/1a90b6b8f33bb4ac642b70c86d512d525d121d97

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Citations in the corpus

Thermal evolution of the core with a high thermal conductivity (2014, unknown): “Ideally, it would be desirable to couple a model such as presented here to one for heat transfer across the mantle, either parameterized (eg Stevenson et al., 1983; Mollett, 1984; Grign´e and Labrosse, 2001; Nimmo et al., 2004) or fully dynamical (eg.”
Core–mantle boundary heat flow (2008, background): “Addition of radiogenic heating in the core demands a further increase in CMB heat flow to produce the same dissipation because the rates of cooling and inner-core growth are reduce”
Thermal and magnetic evolution of the Earth’s core (2003, background): “Mollett, 1984; Labrosse, 1997; Yukutake, 2000; Grigne and Labrosse, 2001; Buffett, 2002; Nimmo et al., 2003 ) but the reliability of these models can be questioned for several reasons.”
Urey ratio and the structure and evolution of Earth's mantle (2008, background): “…2000], however, previous studies on core evolution tend to overlook the controversy over the parameterization of the surface heat loss Q (sections 3.2 and 3.3) and assume the conventional scaling (usually with a high Urey ratio) [e.g., Labrosse et al., 2001; Nimmo et al., 2004; Davies, 2007].”
Tomographic filtering of high‐resolution mantle circulation models: Can seismic heterogeneity be explained by temperature alone? (2009, result): “consistent with a number of studies from geodynamics, seismology and mineral physics [e.g., Glatzmaier and Roberts, 1995; Kuang and Bloxham, 1997; Boehler, 2000; Steinle-Neumann et al., 2001; Buffett, 2002;Gubbins et al., 2004; Nimmo et al., 2004; Nolet etal.,2006;Alfe `e tal.,2002,2007;vanderHils”
Geophysics of Chemical Heterogeneity in the Mantle (2012, background): “…those at the surface: The density contrast between mantle and core is larger than that between crust and atmosphere, and the temperature contrast, though still poorly constrained, may exceed 1300 K ( Jeanloz & Morris 1986, Knittle & Jeanloz 1991, Nimmo et al. 2004, Steinle-Neumann et al. 2002).”
Thermodynamics of silicate liquids in the deep Earth (Invited) (2009, background): “, 2002), and the core solidus (Nimmo et al., 2004).”
Scaling properties of convection-driven dynamos in rotating spherical shells and application to planetary magnetic fields (2006, background): “core age substantially larger than other recent estimates (Labrosse et al. 2001; Nimmo et al. 2004 ), which assumed that a higher heat flux from the core (or higher buoyancy flux) was necessary to drive to geodynamo.”
Dynamics and evolution of the deep mantle resulting from thermal, chemical, phase and melting effects (2012, background): “With no layering, the heat flux can be so large that the inner core grows to much larger than its observed size, unless radiogenic potassium exists in the core (Nakagawa and Tackley, 2004b, 2005a; Nimmo et al., 2004; Butler et al., 2005).”
Dipole moment scaling for convection-driven planetary dynamos (2005, background): “Thermal historymodels indicate that the buoyancy flux F has changed with time, due to secular cooling and inner core growth [34,35].”
Energetics of the Core (2015, methodology): “This is a result of the assumption of constant entropy production; nonetheless, it suggests that the CMB heat flow may be less sensitive to changes in mantle temperature than simple scaling arguments (e.g. Nimmo et al. 2004) would suggest.”
Constraints on thermochemical convection of the mantle from plume heat flux, plume excess temperature, and upper mantle temperature (2006, methodology): “4.3. Layered Mantle Models, the Depleted Mantle Reservoirs, and Geochemistry [42] The current study shows that for whole mantle convection, the CMB heat flux Qcmb is required to be � 12.6 TW, which either exceeds estimated Qcmb or is on the high end of estimated Qcmb from other methods [Anderson, 20”
Reconciling dynamic and seismic models of Earth's lower mantle: The dominant role of thermal heterogeneity (2012, background): “…of 40007300K (e.g. Glatzmaier and Roberts, 1995; Kuang and Bloxham, 1997; Boehler, 2000; Alf e et al., 2002; Buffett, 2002; Gubbins et al., 2004; Nimmo et al., 2004; Hernlund et al., 2005; Nolet et al., 2006; Alf e et al., 2007; van der Hilst et al., 2007; Steinberger and Holme, 2008; Lay et…”
In situ observations of phase transition between perovskite and CaIrO3-type phase in MgSiO3 and pyrolitic mantle composition (2005, background): “Assuming one model of the thermal history of the Earth [75], the DW layer was formed ~200 Myr after the formation of the Earth.”