C17 - Air Masses

Question 1

Define Air Mass?

Answer 1

Constant values for Humidity and Temperature in a horizontal plane.

Question 2

How does an Air Mass obtain its properties?

Answer 2

Over the surface/source.

Question 3

When an Air Mass moves across a warmer surface, what happens to the ELR, Stability and Humidity (3)?

Answer 3

• ELR = Increasing.
• Stability = More Unstable.
• Humidity = Decrease.

Question 4

When an Air Mass moves across a colder surface, what happens to the ELR, Stability and Humidity (3)?

Answer 4

• ELR = Decreasing.
• Stability = More Stable.
• Humidity = Increase.

Question 5

What characteristics will you find in Polar Regions (2)?

Answer 5

• Very Cold.

- Dry.

Question 6

What characteristics will you find in Temperate Regions (2)?

Answer 6

• Cold.

- Wet.

Question 7

What characteristics will you find in Arid Desert Regions (2)?

Answer 7

• Hot.

- Dry.

Question 8

What characteristics will you find in Tropic Regions (3)?

Answer 8

• Moist.
• Hot.
• Humid.

Question 9

True or False. Surface transfer their heat and humidity properties to the air above them?

Answer 9

True.

Question 10

Name two classification which describes the humidity of an Air Mass?

Answer 10

• Maritime.

- Continental.

Question 11

Name four classifications which describes the temperature of an Air Mass?

Answer 11

• Equatorial.
• Tropical.
• Polar.
• Arctic/Antarctic.

Question 12

True or False. Warm Maritime Air Masses are very humid and saturated?

Answer 12

True.

Question 13

True or False. Continental Air Masses are drier than Warm Maritime?

Answer 13

True.

Question 14

What type of Air Mass is mP?

Answer 14

Polar Maritime.

Question 15

What type of Air Mass is cT?

Answer 15

Tropical Continental.

Question 16

What type of Air Mass is mE?

Answer 16

Equatorial Maritime.

Question 17

What type of Air Mass is cAA?

Answer 17

Antarctica Continental.

Question 18

What type of Air Mass is mT?

Answer 18

Tropical Maritime.

Question 19

What type of Air Mass is cP?

Answer 19

Polar Continental.

Question 20

What type of Air Mass is rmP?

Answer 20

Returning Polar Maritime.

Question 21

What is the source region of a Tropical Maritime?

Answer 21

Sub-Tropical High Pressure over the Azores High.

Question 22

What are the characteristics of a Tropical Maritime (2)?

Answer 22

• Warm.

- Very Moist.

Question 23

When a Tropical Maritime Air Mass moves into Europe, what happens to the Stability?

Answer 23

Becomes more Stable.

Question 24

During Winter, what can we expect from a Tropical Maritime Air Mass in terms of Weather and Clouds (2)?

Answer 24

• Fog/Low Clouds.

- Poor Visibility.

Question 25

During Summer, what can we expect from a Tropical Maritime Air Mass in terms of Weather and Clouds (2)?

Answer 25

- No Cloud. | - Good Visibility.

Question 26

What is the source region of a Tropical Continental?

Answer 26

Northern Africa/Southern Europe.

Question 27

What are the characteristics of a Tropical Continental (2)?

Answer 27

- Warm. | - Low Humidity.

Question 28

When a Tropical Continental Air Mass moves into high latitudes, what happens to the Stability?

Answer 28

Becomes more Stable.

Question 29

True or False. The Tropical Continental Air is dry which prevents Cloud Formation and with High Temperatures produce Clear Skies?

Answer 29

True.

Question 30

What is the source region of a Polar Maritime?

Answer 30

Polar Region.

Question 31

What are the characteristics of a Polar Maritime (2)?

Answer 31

- Very Cold. | - Dry.

Question 32

When a Polar Maritime Air Mass moves into Europe, what happens to the Stability?

Answer 32

Becomes more Unstable.

Question 33

During Summer, what can we expect from a Polar Maritime Air Mass?

Answer 33

Uplifting/Thunderstorms.

Question 34

What is the source region of an Arctic Maritime?

Answer 34

Arctic Region.

Question 35

What are the characteristics of an Arctic Maritime (2)?

Answer 35

- Cold. | - Less Moist.

Question 36

What weather can we expect from an Arctic Maritime Air Mass?

Answer 36

Cumuliform Clouds.

Question 37

What is the source region of a Returning Polar Maritime?

Answer 37

Polar Region via Sub-Tropical High Pressure.

Question 38

When a Returning Polar Maritime Air Mass moves South it becomes ‘____’ and then ‘____’ when it turns North (2)?

Answer 38

- Unstable. | - Stable (lower layers).

Question 39

In the middle layers of a Returning Polar Maritime Air Mass, what type of Clouds are found?

Answer 39

Altocumulus Castellanus.

Question 40

What is the source region of a Polar Continental in the Summer?

Answer 40

Central Europe, Russia or Far East Region.

Question 41

What are the characteristics of a Polar Continental in the Summer (2)?

Answer 41

- Warm. | - Dry.

Question 42

What temperatures are reached in the Polar Continental in the Summer?

Answer 42

30°C to 40°C.

Question 43

What conditions does a Polar Continental in the Summer produce?

Answer 43

Warm, dry hazy conditions.

Question 44

What is the source region of a Polar Continental in the Winter?

Answer 44

Russia.

Question 45

What are the characteristics of a Polar Continental in the Winter (2)?

Answer 45

- Very Cold. | - Dry.

Question 46

What temperatures are reached in the Polar Continental in the Winter?

Answer 46

-40°C.

Question 47

What conditions does a Polar Continental in the Winter produce?

Answer 47

Very cold, clear conditions.