How many main types of air masses are commonly found in North America?

The correct answer is four main types of air masses commonly found in North America. These air masses are categorized based on their temperature and moisture characteristics, which significantly affect weather patterns across the continent.

The four primary types are:

1. Maritime Tropical (mT): This air mass originates over warm ocean waters and is characterized by warm, moist air. It often brings humid conditions and precipitation to the regions it affects, particularly along coastal areas.

2. Continental Tropical (cT): This air mass forms over hot, dry land. It is characterized by hot, dry air, which can lead to warmer temperatures and often contributes to clear skies and limited rainfall.

3. Maritime Polar (mP): Originating over cooler ocean waters, this air mass is cool and moist, bringing cloudy, wet conditions, especially to the western coastal areas. It can lead to significant precipitation and lower temperatures.

4. Continental Polar (cP): This air mass forms over land, typically in cold regions, and is cold and dry. It can lead to cool conditions and is known for bringing clear skies and colder temperatures, especially during winter months.

Understanding these types of air masses is essential because they influence local weather patterns