Estimating Wind

Question 1

1 degree of latitude is equal to:

Answer 1

60NM= 111KM

Question 2

List the 4 factors that influence the direction and speed of the wind

Answer 2

1. Coriolis effect
2. Friction
3. Pressure gradient force
4. Centrifugal force

Question 3

the pressure gradient force is inversely proportional to _____ and directly proportional to ________

Answer 3

Air density

the pressure gradient

Question 4

the coriolis effect deflects to which direction

Answer 4

to the right

Question 5

What causes air to flow around highs and lows?

Answer 5

the rotation of the earth on its vertical axis

Question 6

What is the value of the coriolis effect at the equator?

Answer 6

zero

Question 7

The coriolis effect is directly proportional to the

Answer 7

Velocity of the wind

Question 8

the friction force only effects air movement in?

Answer 8

the PBL

Question 9

The Coriolis effect will be _______ by the friction force

Answer 9

diminished

Question 10

The angle at which the wind crosses the isobars due to friction is

Answer 10

10 degrees to 40 degrees

Question 11

What is the force that seems to act from the point of view from an air parcel?

Answer 11

The Centrifugal force

Question 12

When air flows around a high or low presure system, the action of centrigula force will always be directed _______

Answer 12

outward

Question 13

Around an anticyclonic flow, pressure gradient and centrifugal forces are added thus ________

Answer 13

the winds are faster than a straight flow

Question 14

what is geostrophic balance and what does it produce?

Answer 14

When the pressure gradient force and the coriolis force are in balance. It produces geostrophic wind.

Question 15

The geostrophic wind is based on what 4 assumptions?

Answer 15

1 No friction
2 Horizontal flow
3. Straight line flow
4. Static pressure system

Question 16

What is the gradient wind balance?

Answer 16

When the coriolis force, pressure gradient force and the centrifugal force are in balance

Question 17

The gradient wind is based on what 4 assumptions?

Answer 17

1. No friction
2. Horizontal flow
3. curved flow
4. static pressure system

Question 18

geostrophic wind (Vg) involves which 2 forces?

Answer 18

Pressure gradient force (Fp)
Coriolis force (Fd)

Question 19

Gradient wind (Vgr) involves which 3 forces

Answer 19

Pressure gradient Force (Fp)
Coriolis Force (Fd)
Centrifugal Force (Fc)

Question 20

Around a high Fc is added to which force

Answer 20

the pressure gradient force

Question 21

Around a low Fc is added to which force?

Answer 21

The coriolis force

Question 22

Geostrophic wind speed is directly proportional to:

Answer 22

height gradient of a given pressure level