Posted on 03/24/2015 11:12:55 AM PDT by E. Pluribus Unum
The slowdown of major Atlantic currents could lead to irreversible effects on Earth.
New research suggests the observed slowdown in major Atlantic Ocean currents is linked to the Greenland ice sheet's accelerated melting.
The rapid melting of the ice sheet is believed to be a result of man-made global warming, and its impacts could have a major impact on marine ecosystems, sea levels, and weather systems across Europe and the United States, the Potsdam Institute for Climate Impact Research (PIK) reported.
"It is conspicuous that one specific area in the North Atlantic has been cooling in the past hundred years while the rest of the world heats up," said Stefan Rahmstorf of the Potsdam Institute for Climate Impact Research, lead author of the study to be published in Nature Climate Change. "Now we have detected strong evidence that the global conveyor has indeed been weakening in the past hundred years, particularly since 1970."
Data from ice cores, tree rings, coral, and sediments suggest the recent changes are unprecedented since about 900 A.D., which means they are most likely related to man-made global warming.
The slowdown in the Atlantic meridional overturning circulation and other ocean currents is believed to be driven by differences in the density of the ocean water. Warm, light water flows from the south towards the north, while cold, dense northern water flows southwards. Freshwater from the melting Greenland ice sheet is most likely disrupting this natural circulation by diluting ocean water (freshwater is less dense that ocean water with high salinity). The researchers believe the cooling of the North Atlantic is more dramatic than what computer climate simulations have generally determined.
"Common climate models are underestimating the change we're facing, either because the Atlantic overturning is too stable in the models or because they don't properly account for Greenland ice sheet melt, or both," said Michael Mann of Pennsylvania State University. "That is another example where observations suggest that climate model predictions are in some respects still overly conservative when it comes to the pace at which certain aspects of climate change are proceeding."
The scientists do not believe northern Atlantic cooling will prompt a new ice age, but even a gradual change in ocean currents is likely to have major negative effects. It could even lead to a "tipping point" in the Earth system, triggering rapid and irreversible changes. The Intergovernmental Panel on Climate Change (IPCC) has predicted there is a one-in-10 chance of this happening within a century, but expert surveys have suggested the risk could be even higher.
"If the slowdown of the Atlantic overturning continues, the impacts might be substantial," said Rahmstorf. "Disturbing the circulation will likely have a negative effect on the ocean ecosystem, and thereby fisheries and the associated livelihoods of many people in coastal areas. A slowdown also adds to the regional sea-level rise affecting cities like New York and Boston. Finally, temperature changes in that region can also influence weather systems on both sides of the Atlantic, in North America as well as Europe."
The BS factory continues to vomit out their Socialist lies
let me guess ... redistriubution, more government, less freedom, less cheap energy and more taxes is the solution right?
figured!
I was somewhat disappointed to learn otherwise. :D
If.only Congress had passed Obama’s cap and trade bill, none of this would ever happen. Sarcasm.
Are we surprised that yet more junk science blaming "man-made global warming"?
When are these "experts" going to show us how COOLING average temps and greater ice coverage, particularly in the Arctic, prove WARMING is happening?
Does it mean San Francisco and Seattle will be underwater? If so, I’m in...
I’ve identified the new plan for the warmunists - predict everything, so when something happens they can go back and accurately claim that warmunist scientists predicted it.
There is no such thing as irreversible change.
Bottom line: unless we convert to Communism, all life in the oceans is going to die and then we will too.
Is it two or one tapeworms? They seem to be, uh... what’s the settled scientific term for it... mobeusing.
The sky is falling! The sky is falling! And it is being caused by globull warming!
Data from ice cores, tree rings, coral, and sediments suggest the recent changes are unprecedented since about 900 A.D., which means they are most likely related to man-made global warming.
Hmmm. 900 A.D. Seems to me this is right around when Greenland was named Greenland. Funny how these "scientists" didn't want to address the last time the ice sheets were gone. Not an SUV in sight either.
Yadda yadda yadda ...
Data from ice cores, tree rings, coral, and sediments suggest the recent changes are unprecedented since about 900 A.D., which means they are most likely related to man-made global warming.Do they even read what they write?
If it happened before, in 900 AD, why does it now have to be caused by "man-made global warming"?
It only takes about 10 million years (or is it 100 million?) for a major change in an ocean current to occur.
So now is a good time to sell that ocean front lot so you don’t taka a big loss when the prices drop.
See a lengthy takedown of this nonsense at Anthony Watt’ s Watts up With That site:
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