In the wintertime, there are currents which circulate through the Atlantic Ocean that are responsible for warming northern continents like North America and Europe. However, this warming current may soon go away because of climate change and global warming.
Researchers have concluded that if the Earth gets too warm, then the warm current in the Atlantic may collapse completely. If this were to happen, the countries that lie within the North Atlantic are going to have colder winters. The result will be more ice forming in the sea waters around Norway, Iceland, and Greenland. It will also create a rainfall shift throughout the globe.
The Atlantic Meridional Overturning Circulation is the name of the current that is likely going to go away soon. This current acts like a conveyer belt that moves warm water from the southern regions of the world and brings it to the cooler regions in the North Atlantic. The water then starts to lose its heat, which causes it to become colder and denser. At this point, the water sinks and circulates colder water back to the tropical region of the globe. From there, it becomes warm all over again and the entire process repeats itself.
There is no telling when the AMOC would collapse. There is already evidence that it is weakening but scientists still think it will continue to flow for quite some time. One estimate has the AMOC collapsing within the next 300 years if global warming is not addressed. This would cause the North Atlantic to become colder by 7°C in the wintertime, which would be 44°F. Therefore, if countries normally get to around 20°F in the winter, then they would become -24°F. That is the difference and it could have a huge impact on people’s safety and survival.