• Publications
  • Influence
Core–mantle boundary heat flow
Emerging evidence for threefold higher heat flow across the core–mantle boundary prompts a re-evaluation of the role of thermal plumes in geodynamics and the thermal history of the Earth's core and
Estimates of heat flow in the deep mantle based on the power requirements for the geodynamo
Regeneration of the magnetic field by convection in the core places demands on heat flow into the base of the mantle. If the heat flow is too low, thermal convection is shut off and the rate of
Ocean methane hydrates as a slow tipping point in the global carbon cycle
This model lacks many factors that lead to heterogeneity in the real hydrate reservoir in the ocean, such as preferential hydrate formation in sandy sediments and subsurface gas migration, and is therefore conservative in its prediction of releasable methane, finding only 35 Pg of C released after 3 °C of uniform warming by using a 10% critical bubble volume.
A numerical model for the formation of gas hydrate below the seafloor
We develop a numerical model to predict the volume and distribution of gas hydrate in marine sediments. We consider the environment of a deep continental margin where sedimentation adds organic
On the thermal evolution of the Earth's core
The Earth's magnetic field is sustained by dynamo action in the fluid outer core. The energy sources available to the geodynamo are well established, but their relative importance remains uncertain.
Forced nutations of the Earth: Influence of inner core dynamics: 2. Numerical results and comparisons
We apply the theory developed in Paper 1 (Mathews et al., this issue), which includes the solid inner core explicitly in the dynamical equations, to obtain the eigenfrequencies and other
Constraints on magnetic energy and mantle conductivity from the forced nutations of the Earth
Observations of the Earth's nutations are used to explore the possible presence of a conducting layer at the base of the mantle. The existence of such a layer is suggested by recent experiments on
Geodynamic estimates of the viscosity of the Earth's inner core
Recent seismological studies, have suggested that the inner core is rotating relative to the bulk of the Earth, a situation which (according to numerical simulations) may be sustained by convective