Chapter 9 PPT

Question 1

Airmass

Answer 1

A large body of air with relatively uniform thermal and moisture characteristics

Question 2

What are two different different types of airmass characteristics?

Answer 2

• Moisture Characteristics

- Thermal Characteristics

Question 3

What are the two Moisture characteristics? of air masses?

Answer 3

• Maritime

- Continental

Question 4

What are the moisture characteristics of Maritime?

Answer 4

• Moist

- Forms Over Water

Question 5

What are the moisture characteristics of Continental?

Answer 5

• Dry

- Forms Over Land

Question 6

What are the three Thermal Characteristics of air masses?

Answer 6

• Arctic
• Polar
• Tropical

Question 7

What are the thermal characteristics of Arctic?

Answer 7

-Very Cold

Question 8

What are the thermal characteristics of Polar?

Answer 8

-Cool to cold

Question 9

What are the thermal characteristics of Tropical?

Answer 9

-Warm to Hot

Question 10

What type of locations are air masses typically at?

Answer 10

Flat locations with constant pressure of moisture conditions, mainly the flat lans.

Question 11

What type of air masses create High sea level pressure?

Answer 11

Relatively cold air masses

• Bitter Cold
• Cool Maritime

Question 12

What type of air masses create Low sea level pressure?

Answer 12

Relatively warm air masses?

• Hot air masses
• Maritime Air masses in the winter

Question 13

What are Fronts?

Answer 13

A boundary between different air masses

Question 14

Why do we care about fronts?

Answer 14

they create weather, resulting in the formation of clouds and precipitation

Question 15

Cold Fronts?

Answer 15

A front that separates warm and cold air masses, and the cold are is advancing and lifting the warm air.

Question 16

Arctic Front

Answer 16

A cold front that marks the leading edge of an advancing arctic air masses (Really Cold)

Question 17

Warm Front

Answer 17

A front that separates warm and cold air masses, with the cold air retreating and the warm air advancing.

Question 18

For cold fronts, is it conditionally unstable in front or behind the front?

Answer 18

Infront of front

Question 19

For warm fronts, is it conditionally unstable in front or behind the front.

Answer 19

Behind the front

Question 20

Stationary Front

Answer 20

A boundary that separates cold and warm air masses, where neither air masses is advancing nor retreating.

Question 21

Out of a warm front, cold front, and stationary front, which one would most likely be associated with a flood?

Answer 21

Stationary Front

Question 22

Occluded Front

Answer 22

A boundary between cold and colder air masses with warm air aloft

Question 23

Does a cold occlusion Front have coldest air, in front or behind it?

Answer 23

Coldest air behind

Question 24

Does a warm occlusion front have coldest air, in front or behind?

Answer 24

Coldest air ahead

Question 25

Dry line

Answer 25

A front characterized by sharp moisture differences rather than sharp temperature differences

Question 26

Ahead of a dry line, is the weather warm and humid?

Answer 26

Yes

Question 27

Upper level front

Answer 27

An airmass boundary that is present aloft but not at the surface

Question 28

The centers of cold air masses are often associated with low pressure on surface weather maps. (T/F)

Answer 28

FALSE

Question 29

By definition, an airmass must make contact with the surface. (F/T)

Answer 29

FALSE

Question 30

The presence and intensity of precipitation along a cold front is determined by the characteristics of the warm air ahead of the front. (T/F)

Answer 30

TRUE

Question 31

Clouds that develop along warm fronts typically are layered in nature and any precipitation tends to be more widespread and steady than precip formed by cold fronts. (T/F)

Answer 31

TRUE

Question 32

Flooding can be a significant hazard associated with stationary fronts

Answer 32

TRUE