Polar Maritime refers to a type of air mass that originates over the cold waters of the North Atlantic and North Pacific Oceans. This air mass is characterized by its cool temperatures and high humidity, which can lead to cloudy and rainy weather when it moves over land. When Polar Maritime air interacts with warmer air masses, it can create various weather phenomena, including storms and precipitation. This air mass is particularly influential in shaping the climate of regions such as Western Europe and parts of North America, where it often brings mild, wet conditions.