1. Understanding large scale ocean dynamics using measurements of sea level, bottom pressure and gravity.
2. The dynamics of the North Atlantic meridional overturning circulation.
3. Quantifying sea level rise.
4. The geodetic determination of the ocean's mean circulation, including optimal filtering strategies.
5. Ocean mixing and the relationship between the physics, chemistry and biology of the ocean.
The development of a gravitationally self-consistent framework for the measurement and interpretation of sea level change. As one step towards this, presently I am working with data from the Argo array of profiling floats in order to determine the steric component of sea level variability due to changes in ocean density. As the Earth warms over the coming century this component is expected to make a significant contribution to the rise in global mean sea level. However, the vastness of the ocean means the accurate determination of steric sea level is hampered by a paucity of suitable observations. Therefore, my current focus is on understanding how to limit the effect of under-sampling on the measurement of steric sea level variability.