Niklas Boers climatologist from the postdam institute of studying climate change published an article in the magazine of Nature Climate Change, which proves the weakening of the Atlantic meridional circulation (AMOC) – the systems of oceanic currents carrying warm water from the tropics in the North Atlantic. This will lead to inevitable catastrophic changes in global weather in the world.
Previous observations and climatic models have already indicated the gradual weakening of the Atlantic currents, which will occur over several decades. The transition mechanisms to the weak regime serves to add a large amount of fresh water to the North Atlantic due to melting of ice, which significantly reduces the salinity of sea water. In addition, the increase in global temperature will lead to a thermal expansion, which also reduces the stability of the current AMOC state. Collapse circulation is able to lead to the loss of stability of other components of the global climate system, including tropical monsoons, ice shield and amazon forests.
The preceding characteristic fluctuations should be specified on the launch of the critical transition to the weak mode (any random deviation – approx. Ribbons. RU “) in the speed of AMOC, called critical deceleration and employees of the” early warning signals “. Thus, clear signs of AMOC Collapse at the beginning of the Holocene era (12 thousand years ago), expressed in changes in the surface temperature of the sea and the salinity of the sea surface in the northern part of the Atlantic Ocean.
Boers analyzed the variability of the surface temperature of the sea and salinity in the Atlantic Ocean, starting from 1870 and 1900 to identify anomalies indicating the critical slowdown in circulation at present. He discovered the desired early warning signals proving that the recently identified weakening of AMOC over the past decades is not a consequence of natural oscillations caused by natural cycles. Instead, slowing is connected with almost complete loss of AMOC stability during the current century.