Our research has focused on a broad range of problems in the area of Earth system structure, dynamics and evolution. Some of the topics we are currently investigating include:

• ice age dynamics, gravity anomalies and sea level change
• tidal tomographic imaging of deep mantle buoyancy
• mantle flow, dynamic topography and the geological record
• critical events in Earth’s paleoclimate history
• solid Earth and sea level impacts on early and modern human migration
• 3-D variability of mantle viscosity
• modern global warming and sea level change
• long term rotational stability of Earth and terrestrial planets
• anelastic behavior from seismic to ice age time scales
• geodetic measurements of crustal deformation and gravity
• ancient eclipse observations as unique constraints on Earth rotation
• coupled modeling of landscape evolution, marine ice sheet stability and sea level change