Amoc brings warm water from the tropics near the surface and takes fresh water in the opposite direction in the opposite direction
No.
The critical ocean will not be unlikely to turn off this century before the end of the major climate scenarios, according to new discoveries that weaken DoomSday predictions in front of a catastrophic collapse.
The Atlantic Meridial Traffic (AMOC) transports warm water to north of the tropics, which helps maintain the temperature northern Europe. Heating temperature and melting ice from the melting of cold water is weakening the stream of cold water and scientists were afraid, they could close completely. This would immerse the oceanic ecosystem to the chaos and the European climate rapidly cool in several degrees.
Some researchers say that the irreversible aming closure occurred in this century. But the worst case is not unlikely, he says Jonathan Baker UK Met office.
To examine whether the full collapse of AMOC in this century, 34 climate models were used to simulate the amoc changes, the level of greenhouse gases from today’s level. The group also modeled large freshwater volumes in the North Atlantic, the rate of melting today’s ice.
Although AmoC is significantly weaken under these scenarios, the current ocean would remain in his weak state, protected from the deep northern Atlantic water driven by the southern ocean winds. “The Southern ocean winds continue to blow, which brings deep water to the surface, which acts like a powerful pump,” says Baker. “This century keeps Amoc in models.”
The findings simulate the climate model in general a more stable amoc world compared to studies based on statistical methods, which tend to suggest amoc is more fragile.
Niklas Boes At Germany at the Potsdam Institute for Climate Impact Research, the discovery says “good news” for those concerned about the collapse of AmOC. “All art climate models AMOC within 21 centuries are dismissing the full collapse of amoc, because of stable mechanisms caused by the southern ocean,” he noted.
But although the patterns are not anticipated by the full collapse of amoc, KO2 co2 concentrations would lead to significant reductions of current force, 20% and 81 percent.
If AMOC weakens about 50 percent, the baker means, without interruption of marine ecosystems, marine levels of the North Atlantic North Atlantic and changes in global rainfall changes around the world. But this kind of weakening would not bring fast cooling to Europe, he says.
Comparison, 80 percent of 80 percent weaker than today would have catastrophic effects, stress of boes. “That’s, of course, amoc almost closed,” he said. “This will give all influences to cool Europe and change everything that has been tropical monsters and worried”.
Stefan RahmstorfIt is also available at the Potsdam Institute for Climate Impact Studies in Germany, which the world could have been left under the current and deep-deep heating of the Amoc century Amocc. Some studies determine the collapse of amoc so that they have a great weakness, he said more than the closure of all circulation. “The rest of the research exceeds the rest of the wind (current), which is a valuable contribution to scientific literature,” he noted. “However, the assessment of the risks and influence of future amoce does not change in response to global human heating.”
Themes:
