Scientists from the University of South Florida, along with colleagues in Canada and the Netherlands, have determined that the influx of fresh water from the Greenland ice sheet is «freshening» the North Atlantic Ocean and could disrupt the Atlantic Meridional Overturning Circulation (AMOC), an important
component of global ocean circulation that could have a global effect.
This process (also called «thermohaline circulation») has received less attention in the North Pacific than in the North Atlantic, where the formation of North Atlantic Deep Water is a powerful
driver of global ocean circulation and climate.
«Melting Greenland ice sheet may affect global ocean circulation, future climate: University of South Florida and international scientists find influx of freshwater could disrupt the Atlantic Meridional Overturning Circulation, an important
component of global ocean circulation.»
Oceanographically, the Southern Ocean is a major
driver of global ocean circulation and plays a vital role in interacting with the deep water circulation in each of the Pacific, Atlantic, and Indian oceans.
«This response is well known, but what is less known is that the input of fresh water also leads to changes far away in the northern hemisphere, because it disrupts
part of the global ocean circulation,» said Nick Golledge from Victoria University in Wellington, New Zealand, an ice - sheet modeller and co-author.
How close are we to reaching the threshold for a «rewriting»
of global ocean circulation?