Bottom-driven upwelling generated by eastern intensification in closed andsemi-closed basins with a sloping bottom

Cold water is observed in the eastern Great Australian Bight, and the prese nce of this water is inconsistent with that expected from surface Ekman-ind uced upwelling resulting from the imposed windfield. A numerical model is e mployed to investigate this situation under idealized conditions, from whic h the bottom slope has been identified as the most dominant factor contribu ting towards the presence of the cold water. A boundary current generated o n the eastern side of the idealized bight is attributed to eastern intensif ication of a predominantly Stommel type, induced by the topographical gradi ent. It is proposed that the cold water observed at the eastern boundary is the result of upwelling driven by a bottom Ekman-transport convergence in this region, which is in turn the result of a large bottom stress curl main tained by the eastern intensification.