< Marine Matters Issue 11 now available online
16.01.2012 00:54 Age: 6 yrs
Category: IMOS, SEA-IMOS

Tasmanian beaches; as warm as Bondi?

Ocean surface temperatures are presently 18 to 19°C off eastern Tasmania, which is about 3° above normal.


Ocean surface temperatures are presently 18 to 19°C off eastern Tasmania

The same (or lower) temperature was recorded at Bondi Beach on Boxing Day 2011, but there it is about 3° below normal. The explanation for the levelling of the beach temperatures is probably as follows: the relatively cold Sydney temperature was the result of the combined influence of upwelling-favourable north-easterly winds and the departure from the shelf, just north of Sydney, of the East Australian Current (as noted below). The warm Tasmanian temperatures are due in some measure to the presence off Tasmania of the large warm-core eddy that has come slowly south from NSW, even though the core temperature of that eddy is not high at the surface.