CH9 - Turbulence and Windshear Flashcards

1
Q

What is “friction layer”?

A

The layer of air disturbed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is “friction level”?

A

Undisturbed UPPER flow
_________________________
Disturbed SURFACE flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the different types of turbulences?

A

Mechanical: By hills, trees, buildings… (loc: Towns, hills…)

Thermal: Formed by the warm air rising (loc: Areas with low albedo like rocky areas and fields)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

At which altitude diurnal variation is produced?

A

Between 2000-3000 ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

When is the time where the land reaches it coldest temperature? What happen with the friction level?

A

After sunrise. The friction level is at its lowest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When is the time where the land reaches it warmest temperature? What happen with the friction level?

A

In the afternoon. The friction level is higher.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are microbusts?

A

Large amount of descending air.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What conditions prevails mountain waves?

A

Stable air, wind of more than 15 kts and blows across the ridge.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What sort of clouds might be formed when mountain waves are produced?

A

Lenticularis (up), roll clouds (down, near the surface) and cap cloud (sticked to the mountain).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is inversion?

A

The increase of temperature with height.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How are turbulences classified regarding their intensity?

A

Light: 5-15 kts
Moderate: 15-25 kts
Severe: > 25kts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly