Final answer:
The missing term in the question is 'westerly winds' which, along with ocean currents and mountain barriers, influences the climate by transporting moisture and affecting precipitation patterns.
Step-by-step explanation:
The climate mentioned in the question is affected by Pacific Ocean currents, the coastal mountains, and the westerly winds - winds that blow from west to east. These winds are significant factors in determining the climate of the region. They often carry moisture from the ocean over coastal lands, where it can fall as precipitation, especially in areas with mountain barriers which can lead to a rain shadow effect on the leeward side. Ocean currents such as the Gulf Stream and El Niño events also play crucial roles in shaping regional climates by transporting warm water and influencing weather patterns, respectively.