They published their findings in 2015, and concluded that the AMOC circulation showed exceptional slowdown in the last century, and that Greenland melt is a possible contributor, with the slowdown of AMOC since the 1970s being unprecedented over the last millennium. The BBC is not responsible for the content of external sites.

It deals with the Gulf Stream. They say that a weakening Gulf Stream is heating up the global temperature once again.”. 2018 found that a part of the Gulf Stream variability was related to the NAO ocean cycle. “The good news is the indicators show that this slowdown of the Atlantic overturning circulation is ending, and so we shouldn’t be alarmed that this current will collapse any time soon,” Tung said. "[8], Global warming could, via a shutdown of the thermohaline circulation, trigger cooling in the North Atlantic, Europe, and North America. Many of the most memorable and devastating storms in eastern North America and western Europe, popularly known as superstorms, have been winter cyclonic storms, though sometimes occurring in late fall or early spring, that generate near-hurricane-force winds and often large amounts of snowfall. When the Amoc was at a minimum between 1975 and 1998, more heat entered the atmosphere and global temperatures gradually went up. US hostages released in Yemen 'prisoner swap', Trump's son Barron had Covid-19, says first lady, Hidden camera's hugging tiger wins top photo award, Shattering Korea’s cement ceiling. 2018 found that a part of the Gulf Stream variability was related to the NAO ocean cycle. Climate change: Gulf stream collapse could be like a disaster movie This article is more than 10 years old Scientists predict an ice age could be provoked in a matter of months So far it has been said: If it becomes weaker and possibly fails to appear at all, then it gets cold. The fact that scientists did not predict the effects seen by the two research teams in their Nature studies suggests existing models need to be improved. Amazon near tipping point of switching from rainforest to savannah – study, Three Scenarios for the Future of Climate Change, David Attenborough: “Our planet is headed for disaster.”, Justin Trudeau: ‘The World Is In Crisis, And Things Are About To Get Much Worse’.

Hansen et al. the shutdown of the Atlantic Ocean currents, Gulf Stream current at 'record low', warn scientists, You may not agree with our views, or other users’, but please respond to them respectfully, Swearing, personal abuse, racism, sexism, homophobia and other discriminatory or inciteful language is not acceptable, Do not impersonate other users or reveal private information about third parties, We reserve the right to delete inappropriate posts and ban offending users without notification. Please continue to respect all commenters and create constructive debates. If the guld stream (along with other parts of the global thermohaline circulation system)These videos help visualize the problems discussed in the chapter: “The Doomsday Book” by Marshall Brain lays out this scenario in amazing detail and offers solutions to prevent this doomsday scenario from unfolding. When the Amoc current moves faster, more of the heat that is trapped in our atmosphere from the burning of fossil fuels is taken and stored up to 1,500m below the surface of the ocean. [1], Don Chambers from the University of South Florida College of Marine Science mentioned: "The major effect of a slowing AMOC is expected to be cooler winters and summers around the North Atlantic, and small regional increases in sea level on the North American coast. By doing so it in turn propels the northward Gulf Stream up on the surface, reinforcing the whole circuit with positive feedback. Changes in the strength of the AMOC affect how much heat leaves our atmosphere. The Gulf Stream is weakening, and Europe could expect a prolonged cold spell as the world warms – but not the day after tomorrow. Trump taxes: A 'fundamentally unfair' system? [13][20], In 2008, Vage et al. They found a natural pattern with declines, flat periods and increases over the decades. The Gulf Stream is weakening, and Europe could expect a prolonged cold spell as the world warms – but not the day after tomorrow. Nonsense. So should we be worried about the Gulf Stream, and is another ice age on the horizon? These show there is a 50% chance the current will collapse … One seizes it’s trunk and calls it a snake. See also report in The Daily Caller. The study, published in the journal Nature Communications, confirms what climate scientists have always known: any sudden catastrophic return of the Ice Ages – dramatised in Hollywood’s notorious 2004 climate change movie The Day After Tomorrow – won’t happen at action movie pace. Shifted engine of circulation: Climate change could not only weaken the Atlantic circulation flow, but could also shift it, as a simulation now suggests. You can pre-order the book today on the pre-order page. However, even if the Amoc weakening is only gradual – as the climate models predict and the current data appears to show – it is still a cause for concern. Researchers say a slower current will carry less heat down to the deep oceans meaning more will enter the atmosphere. CS1 maint: multiple names: authors list (, Atlantic meridional overturning circulation, Potsdam Institute for Climate Impact Research, Atlantic Meridional Overturning Circulation, Atmosphere-Ocean General Circulation Models, "Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation", "Melting Greenland ice sheet may affect global ocean circulation, future climate", "Predictions Implicit in "Ice Melt" Paper and Global Implications", "Extreme sea level rise event linked to AMOC downturn", "Evidence for Two Distinct Modes of Large-Scale Ocean Circulation Changes over the Last Century", "Why the U.S. East Coast could be a major 'hotspot' for rising seas", Shutdown Of Circulation Pattern Could Be Disastrous, Researchers Say, "Weather Facts: North Atlantic Drift (Gulf Stream) - Weather UK - weatheronline.co.uk", "Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming is highly dangerous", Satellites record weakening North Atlantic Current, "Britain faces big chill as ocean current slows".
Failing ocean current raises fears of mini ice age. The Gulf Stream was also particularly weak during the Little Ice Age, a natural cold phase. Scientists think changes in Atlantic currents certainly played a role in the onset of the last ice age. Known as Amoc for short, the term refers to the system of ocean currents that acts like a conveyor belt for water and brings warmth to Western Europe. Reflections on a Possible Outcome of the Great Global Experiment. Due to the sheer scale of this comment community, we are not able to give each post the same level of attention, but we have preserved this area in the interests of open debate. "[2] James Hansen and Makiko Sato stated: .mw-parser-output .templatequote{overflow:hidden;margin:1em 0;padding:0 40px}.mw-parser-output .templatequote .templatequotecite{line-height:1.5em;text-align:left;padding-left:1.6em;margin-top:0}, AMOC slowdown that causes cooling ~1 °C and perhaps affects weather patterns is very different from an AMOC shutdown that cools the North Atlantic several degrees Celsius; the latter would have dramatic effects on storms and be irreversible on the century time scale. Yan et al. In “The Doomsday Book” by Marshall Brain, a collapse of the gulf stream is one of those unexpected side-effects of global warming that could have massive effects on both North America and Europe.If the guld stream (along with other parts of the global thermohaline circulation system)These videos help visualize the problems discussed in the chapter: ", "Where we have direct measurements, such as off the coast of Florida, the measurements there have flattened since 2011. Two new studies published in the scientific journal Nature have brought a new threat to the world’s attention: the shutdown of the Atlantic Ocean currents including the Gulf Stream. It focused on a sudden collapse of the Amoc caused by global warming leading to a disastrous freezing and the dawning of a new ice age. Europe was plunged into a cold snap 13,000 years ago during a period known as the Younger Dryas and then warmed up about 11,000 years ago. And it started to strengthen again about four centuries before the world warmed. When it cools its higher salinity makes it exceptionally dense so that it downwells all the way down to the ocean floor. [14], In April 2004, the hypothesis that the Gulf Stream is switching off received a boost when a retrospective analysis of U.S. satellite data seemed to show a slowing of the North Atlantic Gyre, the northern swirl of the Gulf Stream. The evaporation of ocean water in the North Atlantic increases the salinity of the water as well as cooling it, both actions increasing the density of water at the surface. Огромные […], By continuing to use the site, you agree to the use of cookies. The Gulf Stream provides heating for Western Europe. Also see the articles on the study in Die Welt. “We have about one cycle of observations at depth, so we do not know if it’s periodic, but based on the surface phenomena we think it’s very likely that it’s periodic,” Tung said.


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