Wind & Jets & Fronts

Question 1

Jet streams are caused by

Answer 1

Difference of temperature

Question 2

Sub tropical jet streams altitude

Answer 2

40,000ft

Question 3

Polar jet streams altitude

Answer 3

30,000ft

Question 4

Seasonal arctic front jet altitude

Only in northern hem

Answer 4

At 20,000ft

Question 5

Seasonal tropical jet (july). Jet stream comes from

Answer 5

The east

Question 6

Jet streams are no higher than tropopause because

Answer 6

Temperature is then constant

Question 7

Core of a jet stream is always found in

Answer 7

Hot air

Question 8

Isotacs?

Answer 8

Where wind speed is all the same

Question 9

There is no CAT in the

Answer 9

Core

Question 10

Core of jet stream faces

Answer 10

Cold air

Question 11

Turbulence categories

Answer 11

Light
Moderate
Severe

Question 12

Light turbulence

Answer 12

5-15kts

<0.5g at aircraft CG

Question 13

Moderate turbulence

Answer 13

15-25 kts

0.5-1g

Question 14

Severe turbulence

Answer 14

> 25 kts

>1.0g at aircraft CG

Question 15

Broken terrain affect on turbulence

Answer 15

Heavier

Question 16

If mountains, what type of cloud appear

Answer 16

Lenticular cloud

Question 17

Horizontal wind-shear rate of change of wind speed
&
Vertical

Answer 17

Kts/1000ft

Kts/100ft

Question 18

Topography

Answer 18

Wind shear via trees

Question 19

Macrobursts vs microbursts

Answer 19

Macro cover larger distances.and over 5 minutes

Question 20

wake turbulence category for a/c determined by aircraft’s…

Answer 20

MTOM

Question 21

Wake turbulence separation is through

Answer 21

Distance on approach

Minutes on departures

Question 22

Stable air doesn’t want to

Answer 22

Move up

Question 23

Quasi stationary front basically means

Answer 23

Not quite cold, not quite warm front. Isobars parallel to front

Question 24

Slope gradient of warm front
&
Cold front

Answer 24

1: 150
1: 80

Question 25

Speed of warm front

Cold front

Answer 25

Geostrophic X 2/3

Same as geostrophic wind