Ocean currents disappear

Ocean currents can regulate the climate.

For example, the temperate maritime climate in western Europe is not only influenced by the prevailing westerly winds all year round, but also by the coastal North Atlantic warm current. If the North Atlantic warm current disappears, there may be no temperate maritime climate in Western Europe.

Similarly, the arid climate on the west coast of South America is the same.

So the disappearance of ocean currents will lead to drastic changes in the climate.