Seminar by Dr. Fabian Schloesser

Dynamics of the Leeuwin Current System

The coastal circulation off Western Australia differs from most other eastern boundary current systems in that its main current, the Leeuwin Current (LC) is directed southward towards the pole. In my presentation, I will discuss simple analytic models to explain the unique structure of the Leeuwin Current system. In these models, the poleward LC occurs because of interaction of the meridional surface density gradient in the Southern Indian Ocean with the continental slope.

Seminar by Dr. Ken Takahashi

A theoretical model of strong and moderate El Niño regimes. Several nonlinear processes have been proposed to play a role in El Niño-Southern Oscillation (ENSO). The existence of two regimes for El Niño (EN) events, moderate and strong, has been specifically proposed to originate from the nonlinearity in the Bjerknes feedback associated with the existence of a threshold in sea surface temperature for deep atmospheric convection to occur in the eastern Pacific. The 2015-16 EN event provides further evidence for the two regimes.