He studies the oceans, which cover two thirds of the world’s surface and act as a reservoir to store heat. They are forced at planetary scales on the order of 1,000,000 metres (examples are heating by the sun and tides generated by the moon) but the dissipation occurs at scales of 0.000001 metres. In this vast range of length scales there are many interesting dynamical processes that contribute to the transfer of energy down from the planetary scales to the micro-scales.