Asymmetry of the ocean’s thermohaline circulation

The ocean is highly turbulent. Pathways of free-floating buoys are chaotic and circulation patterns are dominated by mesoscale eddies – the ocean’s equivalent to atmospheric storms. The ocean is at the same time organised. Substances injected into the ocean follow broad and distinct routes near the sea surface from the Pacific to the Atlantic Ocean. As a result the North Pacific and North Atlantic Ocean’s are in marked contrast. The Pacific is cold and fresh and the Atlantic is warm and salty. Known as the thermohaline circulation, this helps maintain Europe’s relatively… Read More

Linking the seasonal cycle of ocean water masses to transient climate change

In boreal winter the North Atlantic and Pacific Oceans become cold, dense and turbulent. Oxygen, carbon and other substances are drawn out of the atmosphere and ventilated into the deep ocean. In boreal summer, as the surface layers in the north warm, cooling and ventilation begins in the southern hemisphere in earnest. The process of seasonal ventilation dictates the ocean’s role in climate – both present and future. Only in the last decade has a systematic understanding of seasonal ventilation become possible due to the presence of thousands of autonomous buoys (ARGO)… Read More

Quantifying Global Water Cycle Change using Ocean Observations

Global rates of rainfall and evaporation are amplifying rapidly as a consequence of global warming. Recent studies have suggested that this ‘water cycle’ could be amplifying faster than global climate models had predicted. More accurate quantification of water cycle change and its causes is urgently needed. Changes in the water cycle leave an imprint on the ocean by changing ocean salinity. The candidate will quantify water cycle change based on new observations of ocean salinity and using novel methods developed by the supervisory team. These findings will help improve predictions of water… Read More

Ocean current velocimetry from ultra-high resolution satellite imagery

Honours/Masters project available in methods for estimating ocean surface velocities from satellite observations.

Fluid transport by vortex ring entrainment

Honours/Masters project available in the fluid dynamics of vortices in the atmosphere, ocean, and laboratory experiments.