Right now, there’s something big spinning off the coast from Sydney – a giant rotating vortex of sea water, powerful enough to dominate the ocean currents off south-eastern Australia.
Oceanographers describe these spinning water bodies as “eddies” – but they’re not the small eddy currents you see in creeks or rivers. Ocean eddies are enormous. They’re usually hundreds of kilometres across (100–300km), up to 2km deep and can be visible from space.
