The name of the largest ocean current in the Atlantic Ocean is the Atlantic Meridional Overturning Circulation (AMOC). This system of currents includes the Gulf Stream, which transports warm water from the tropics northward along the eastern coast of the United States and across the Atlantic Ocean toward Europe. The AMOC plays a critical role in regulating global climate by influencing temperature and precipitation patterns across the Atlantic. Its strength and stability are crucial for maintaining climate balance, and changes in this current system could have significant implications for weather patterns and sea level rise worldwide.