Which air masses are found in Canada from north to south?

The correct sequence of air masses found in Canada from north to south is cA (Continental Arctic), mA (Maritime Arctic), mP (Maritime Polar), and mT (Maritime Tropical).

Starting with cA, this air mass originates from the Arctic regions and is characterized by its very cold and dry conditions. It impacts the northern parts of Canada and can lead to extremely low temperatures, particularly in winter.

Moving southward, mA air masses are also cold but are slightly warmer and more moist due to their origin over the oceans. These masses can influence weather in central Canada, bringing about variations depending on the season.

Next is mP, which comes from the Pacific and brings cooler, moist air. This air mass is prevalent throughout the western regions of Canada and can contribute to cloudiness and precipitation, particularly along coastal areas.

Finally, mT air masses, originating from the tropical regions, are warm and humid. These can reach southern Canada, especially during the warmer months and often lead to a more active weather pattern that can bring thunderstorms and warmer temperatures.

This sequence acknowledges the correct positioning of each air mass in relation to geographical location in Canada, providing an accurate view of climatological conditions across the country.