If the AMOC collapsed, it would increase cooling of the Northern Hemisphere, sea level rise in the Atlantic, an overall fall in precipitation over Europe and North America and a shift in monsoons in South America and Afria, Britain's Met Office said
www.reuters.com/…
Study:
Cooling down the world oceans and the earth by enhancing the North Atlantic Ocean current
This paper presents details of the fundamentals of the Arctic Ocean circulation and presents three possible approaches for increasing the salinity of the surface water of the Arctic Ocean. It then discusses that increasing the salinity of the Arctic Ocean would warm the atmosphere of the Arctic region, but cool down the oceans and possibly the Earth. However, it might take thousands of years for the effects of cooling the oceans to cool the global average atmospheric temperature.
link.springer.com/...
Findings from a similar 2018 study drew comparisons to the scientifically inaccurate 2004 disaster movie “The Day After Tomorrow,” which used such an ocean current shutdown as the premise of the film. At the time, study authors said a collapse was at least decades away but would be a catastrophe. yahoo.com/...
Levke Caesar, at Maynooth University in Ireland, who was not involved in the research, told the Guardian: “The study method cannot give us an exact timing of a possible collapse, but the analysis presents evidence that the AMOC has already lost stability, which I take as a warning that we might be closer to an AMOC tipping than we think.” sports.yahoo.com/...
Observation-based early-warning signals for a collapse of the Atlantic Meridional Overturning
www.nature.com/…
The late climate scientist Wallace S. Broecker wrote in 1997 that the AMOC is the “Achilles’ heel” of the climate system, citing evidence that it has switched on and off repeatedly over the course of Earth’s history, with the power to flip warming periods to intense cold in the Northern Hemisphere.
www.google.com/...
Study warns of 'irreversible transition' in ocean currents that could rapidly freeze parts of North America
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If the current system collapses, it would lead to dramatic changes in worldwide weather patterns.
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If this circulation shuts down, it could bring extreme cold to Europe and parts of North America.
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www.google.com
Slowdown in Atlantic Ocean current bringing water to Europe causing
rapid global surface warming
Chen, X. and Tung, K-K (2018) Global surface warming enhanced by weak Atlantic overturning circulation, Nature, doi:10.1038/s41586-018-0320-y
McCarthy, G. D. and Thorne, P. W. (2018) Atlantic slowdown boosts surface warming, Nature doi:10.1038/d41586-018-05712-x
A slowdown in the Atlantic Ocean current bringing warm water up to Europe from the tropics could trigger “a period of rapid global surface warming”, a new study suggests.
The research, published in Nature, says that a recent weakening of the “Atlantic Meridional Overturning Circulation” (AMOC) is coming to an end, but will stay at a “prolonged minimum” for the next two decades.
This would see relatively low levels of heat uptake in the Atlantic Ocean, thus boosting rising temperatures at the Earth’s surface.
The indirect “proxy” data used to analyse the AMOC suggest that its weakening is part of a natural cycle, rather than being caused by human-caused warming – as had been proposed by two studies published earlier this year.
However, researchers not involved in the study warn that it is “debatable whether such strong conclusions” about the AMOC can be drawn using proxy data, rather than direct observations.
Weakening
The AMOC is a system of currents that brings warm, salty water in the upper layers of the ocean up from the Gulf of Mexico into the North Atlantic. It then sends cold, more dense water back again in the deep ocean on a constant conveyor belt.
This conveyor plays a crucial role in western Europe’s climate as the incoming warm water releases heat into the atmosphere. Without it, for example, UK winters would be around 5C colder.
Read more:www.carbonbrief.org/..
A crucial ocean circulation is showing signs of instability. Its shutdown would have serious impacts on our weather.
(CNN)A crucial system of currents in the Atlantic Ocean that helps control temperatures in the Northern Hemisphere and has implications for the entire planet's weather systems is showing signs of instability due to human-made climate change, scientists say.
amp.cnn.com/...
"If circulation shuts down, it could bring extreme cold to Europe and parts of North America"
Major Atlantic Ocean current system approaching critical threshold, research shows www.exeter.ac.uk/…
The ocean is about to flip a switch that could permanently disrupt life on Earth
The Atlantic Meridional Overturning Circulation (AMOC) is destabilizing to a dangerous point, a new study says
www.salon.com/…
This decline may be associated with an almost complete loss of stability over the course of the last century, and the AMOC could be close to a critical transition to its weak circulation mode
Climate news:
Scientists may have solved a huge riddle in Earth’s climate past. It doesn’t bode well for the future.
An ancient flood seems to have stalled the circulation of the oceans, plunging the Northern Hemisphere into a millennium of near-glacial conditions. washingtonpost
Is extreme weather related to climate change?
June 2021 was the hottest June in history. Death Valley, California hit 130 degrees Fahrenheit , just 4 degrees shy of the hottest temperature ever recorded on earth.
Is extreme weather related to climate change?
January 31, 2019 | 2:56 PM EDT
Extreme weather, like the polar vortex, is becoming more common as the Arctic continues to be disrupted by climate change.
20 hours ago — If the AMOC collapsed, it would increase cooling in the Northern Hemisphere, contribute to rising sea levels in the Atlantic, an overall fall in
www.google.com/…
Climate change can affect the intensity and frequency of precipitation. Warmer oceans increase the amount of water that evaporates into the air. When more moisture-laden air moves over land or converges into a storm system, it can produce more intense precipitation—for example, heavier rain and snow storms.
More:
things to watch for in the latest IPCC report on climate science theconversation
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The Greenland ice sheet experienced a massive melting event last week
This could have short-term and long-term implications for sea-level rise.
www.washingtonpost.com/...
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