Cold spot of the Atlantic Ocean, south of Grolândia
The scientists have found that the person responsible for a “cold spot” south of Granelândia in the Atlantic Ocean is the slowdown of ocean currents.
A study at the end of May in Communications Earth and Environment finally revealed the cause of a Giant spot of cold water in the Atlantic Ocean.
The anomaly located southern Granelândia is, curiously, designated by the North Atlantic warming hole, and has been surprising scientists for years. Despite the constant warming of oceanic waters around the world, this area He cooled up to 0.3 degrees Celsius during the last century.
The study concluded that a Change of ocean currents It was largely responsible for this unexpected cooling.
Analyzing ocean temperatures and salinity standards, scientists have associated this mysterious cooling softening of a system of ocean currents called the southern circulation of the Atlantic (AMOC).
As it recalls, the cold bubble has been a point of discord among the oceanographers. Some believed that ocean dynamics were responsible, while others suggested that atmospheric influences, such as aerosol pollution, were the cause.
The new study can help resolve the disagreement, providing evidence that the oceanic dynamics is responsible.
There are only about 20 years of direct observations from Amoc, so the research team was based on other data to follow the older ocean movements. Temperature and salinity data were used, which are correlated with the current speed, to discover the last century Amoc standards and used 94 different ocean models to evaluate the changes.
With a clear chronology of the in hand, scientists found that only models that included slower Atlantic currents corresponded to real -world cooling.
Marine ecosystems can also be negatively affected by changing currents, as the temperature and salinity of water can determine the local habitability of some species.
