The North Atlantic Oscillation (NAO) is a climate phenomenon that controls the direction and strength of the westerly winds in the North Atlantic region. The NAO is often referred to as the "Arctic Oscillation" or "AO," which is a related but distinct phenomenon that affects the Arctic and surrounding regions. Other synonyms for the NAO include the "Atlantic Multidecadal Oscillation," "North Atlantic Jet," and "North Atlantic Oscillatory Mode." The NAO has significant impacts on weather patterns, ocean circulation, and global climate, making it an important topic of study for climate scientists and meteorologists worldwide.