Figure B1 shows two air masses and a front. Study the figure and then select the

Question

Figure B1 shows two air masses and a front. Study the figure and then select the correct answers from the following. Airmass (North) 49 4 40 43 Ha 53 5 LINE B 72 63 60 61 73 64 Airmass (South) Figure B1: Two different air masses and the location of a front Select the two that apply View Available Hint(s) The air mass to the north of the front has lower specific humidity. Prevailing winds are from the east in the air mass to the north of the front. The air mass to the south of the front is a cP air mass. Line B is a cold front The front will move from east to west

Explanation / Answer

Answers-

The air mass to the north of the front has lower specific humidity-

Because- Air mass is an extremely large body of air whose properties of temperature and moisture content (humidity), at any given altitude, are fairly similar in any horizontal direction

* can cover hundreds of thousands of square miles.

* there can be small variations

The properties and movements of air masses are responsible for all the weather patterns we experience in daily life. An air mass is a large body of air, with a similar temperature and moisture content throughout. Air masses can be small, or they can be gigantic, covering hundreds of thousands of miles. Air masses over water are called maritime air masses and contain a lot of evaporated moisture. Air masses over land are called continental air masses and are much drier.

&

The air mass to the south of the front is a cP air mass-

Because- 4 general air mass classifications categorized according to the source region.

1) polar latitudes P - located poleward of 60 degrees north and south.

2) tropical latitudes T - located within about 25 degrees of the equator

3)continental c - located over large land masses--dry

4) marine m - located over the oceans-moist

We can then make combinations of the above to describe various types of air masses.

cP continental polar cold, dry, stable

cT continental tropical hot, dry, stable air aloft--unstable surface air

mP maritime polar cool, moist, and unstable

mT maritime tropical warm, moist, usually unstable

Where-

cP - wintertime bitter cold can extent to Southern US and even Florida causing crop damage. Require long, clear nights, which means strong radiational cooling of air near the surface. A stable air mass. Little moisture added so air is dry.

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