What are the two source regions?

What are the two source regions?

The main source regions are the high pressure belts in the subtropics (giving rise to tropical air masses) and around the poles (the source for polar air masses).

What were the two basic source regions?

Air masses are commonly classified according to four basic source regions with respect to latitude. These are Polar (cold), Arctic (very cold), Equatorial (warm and very moist), and Tropical (warm).

What makes a good source region?

Source Regions A source region must have certain temperature and humidity properties that can remain fixed for a substantial length of time to affect air masses above it. Air mass source regions occur only in the high or low latitudes; middle latitudes are too variable.

What two criteria must be met for an area to be an air mass source region?

An ideal source region must meet two criteria. First, it must be an extensive and physically uniform area. The second criterion is that the area is characterized by a general stagnation of atmospheric circulation so that air will stay over the region long enough to come to some measure of equilibrium with the surface.

What are the characteristics of an air mass source region?

They have relatively uniform temperature and moisture content; the region separating two different air masses is called a front. Air masses form in “source regions” where there is little topography and relatively stagnant winds near the surface.

What are the characteristics of a good air mass source region?

If an area is described as a “good air mass source region,” what information can you give about it? That the area is long, flat, and uniform for air masses to originate and retain similar properties with the surface below it, such as arctic plains and warm oceans.

What are the two air masses?

There are four categories for air masses: arctic, tropical, polar and equatorial. Arctic air masses form in the Arctic region and are very cold. Tropical air masses form in low-latitude areas and are moderately warm. Polar air masses take shape in high-latitude regions and are cold.

What are the conditions necessary for an air mass to form?

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.

What are two conditions you need for air mass formation?

Air masses form over large surfaces with uniform temperatures and humidity, called source regions.

Which of the following criteria is not a characteristic of a good air mass source region?

Which of the following criteria is NOT a characteristic of a good source region? The area must frequently experience cyclones. Which of the following air masses probably has the lowest water vapor content? Which of these is common to both cold and warm fronts?

What is an air mass and what conditions are necessary for one to form quizlet?

What is an air mass and what conditions are necessary for one to form? Air masses are large, distinct parcels of air, are large (more than 1000 ft across) and several km in altitude, its temp./humidity/stability is relatively homogenous, and it travels as unit distinct from surrounding air.

What are 2 conditions you need for air mass formation?

What conditions are necessary for an air mass to form? It must stay over a land or sea surface long enough to acquire the temp/humidity/stability characteristics of the surface below. They are associated with source regions, they must be extensive, physically uniform, and have stationary air.