indicate that, in the Northern and Southern Hemisphere alike, the borders of the ocean gyres and their boundary currents are moving closer to the poles, [...] 6,000 years ago a tipping point was reached relatively suddenly. This was the key finding of a study by group of researchers led by geologists from the Alfred [...] ). (Graphic: Johannes Sutter) [05 February 2016] A future warming of the Southern Ocean caused by rising greenhouse gas concentrations in the atmosphere may severely disrupt the stability of the West