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What moves air masses around the Earth?

What moves air masses around the Earth?

Air masses build when the air stagnates over a region for several days/weeks. To move these huge regions of air, the weather pattern needs to change to allow the air mass to move. One major influence of air mass movement is the upper level winds such as the upper level winds associated with the jet stream.

What makes air masses move?

One major influence of air mass movement is the upper level winds such as the upper level winds associated with the jet stream. Air masses modify once they move out of their source region. For example, a cold air mass will modify (warm up in this case) as it moves over warmer land in lower latitudes.

What affects air mass?

Air masses form over large surfaces with uniform temperatures and humidity, called source regions. Low wind speeds let air remain stationary long enough to take on the features of the source region, such as heat or cold.

How does the temperature difference between air masses affect weather?

The greater the temperature difference between the two air masses, the stronger the winds will be. Fronts are the main cause of stormy weather. In other words, a cold front is right at the leading edge of moving cold air and a warm front marks the leading edge of moving warm air.

What happens to the warm and cool air as the air masses meet?

When two different air masses come into contact, they don’t mix. They push against each other along a line called a front. When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses.

What are the 4 major air masses in North America?

The air masses in and around North America include the continental arctic (cA), maritime polar (mP), maritime tropical (mT), continental tropical (cT), and continental polar (cP) air masses.

What two characteristics define an air mass?

Temperature and humidity are two characteristics used to classify air masses.