Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CPL - Meteorology > Met - Global Winds > Flashcards

Met - Global Winds Flashcards

1
Q

When thinking about the coriolis effect, what is the best way to visualise the earths rotation …..

A

either from above looking down onto the north pole or from below looking up at the south pole

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

A backing wind is changing direction which way …..

A

anti-clockwise

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

Coriolis Effect:

Rotation = Clockwise

Deflection = …..

A

Coriolis Effect:

Rotation = Clockwise

Deflection = Left

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

Coriolis Effect:

Rotation = Anti-clockwise

Deflection = …..

A

Coriolis Effect:

Rotation = Anti-clockwise

Deflection = Right

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

A gust is defined as ……

A

lesser duration and magnitude than a squall

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

Which way will a geostrophic wind be blowing …..

A

straight along the isobars

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

The coriolis eddect explaions the tendency of wind to …..

A

turn left in the southern hemisphere

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

What happens when the pressure gradient is strong enough to over come the coriolis effect …..

A

the air swings to the right and a low is formed

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

isobars that are close together indicate 2 things ……

A
  1. Steep pressure gradient
  2. Strong winds
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

When the coriolis force is exactly balance by the pressure gradient, the resulting wind is called …..

A

geostrophic wind

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

Anti-cyclonic flows which way …..

A

It flows about a high in either hemisphere

Left in the southern hemisphere

Right in the northern hemisphere

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

The pressure gradient changes over a given ….. ……

A

horizontal distance

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

Coriolis Effect:

Rotation = …..

Deflection = Left

A

Coriolis Effect:

Rotation = Clockwise

Deflection = Left

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

Buys Ballots Law …..

A

stand with your back to the wind in the southern hemisphere and the lowest pressure will be on your right hand side

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

The pressure gradient force acts …..

A

at right angles to the isobars towards the lower pressure

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

If the isobars are widely spread the wind will be …..

A

weak

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which way does the air flow out of a high and why …..

A

out and to the left - this is because of the coriolis effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which way will a gradient wind blow ……

A

it will follow the isobars

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Backing wind = clockwise/anti-clockwise

A

anti-clockwise

15
Q

Which way does the earth rotate when looking at it from below at the south pole …..

A

clockwise

17
Q

Define Backing ……

A

You’ll need to turn to the left to face the wind i.e. the wind is blowing in your face

19
Q

Veering wind = clockwise/anti-clockwise

A

Clockwise

19
Q

Geostrophic flow is when there is ……

A

an exact balance between forces and no tendancy to swing left or right

20
Q

Cyclonic flow in the northern hemisphere flows …..

A

anti-clockwise

21
Q

In relation to the wind: Surface friction can be ignored above …… ft

A

3000ft

22
Q

If you move at right angles to the isobars, the rate of pressure change is …..

A

at its maximum

23
Q

Define Veering …..

A

You’ll need to turn to the right to face the wind i.e. the wind is blowing in your face

24
Q

Near the equator the coriolis effect is …..

A

zero

25
Q

Compared to the gradient wind flow, the surface wind over land will …..

A

veered by 300 and slowed by 2/3

26
Q

What does surface friction do to the wind ……

A

slows it down

28
Q

Which way will the wind blow in relation to a high at the equator ……

A

directly out of a high

29
Q

Pressure Gradient:

The greater the rate of pressure change the ….. the gradient and the ….. the air moves

A

steeper, faster

30
Q

over the land surface friction degrades the wind by ……

A

2/3 in speed and veers by 300

32
Q

Coriolis Effect:

Rotation = …..

Deflection = Right

A

Coriolis Effect:

Rotation = Anti-clockwise

Deflection = Right

34
Q

Pressure gradient determins ….. ……

A

wind speed

35
Q

The rate at which pressure changes over a horizontal distance is known as the ….. …..

A

pressure gradient

37
Q

A squall is defined as ……

A

16kt - 22kt increase in wind speed

38
Q

What is the dominate force of wind at the equator …..

A

pressure gradient

39
Q

over the sea surface friction degrades the gradient wind by ……

A

strength by 1/3 and veering by 100

40
Q

An aircraft flying from a high to low will experience …..

A

left drift

41
Q

Cyclonic flow in the southern hemispher rotates …..

A

clockwise

42
Q

Compared to the gradient wind, the surface wind direction in the southern hemisphere can be found to be …..

A

further to the right in both highs and lows

43
Q

The strength of the pressure gradient force depends most on the …..

A

spacing of the isobars

44
Q

The term geostrophic wind refers to the steady flow of wind …..

A

along straight isobars

45
Q

Surface wind, when compared to gradient wind flow is found to be …..

A

veered to the right and slower

46
Q

Which way will the wind blow in relation to a low at the equator …..

A

directly into the low

CPL - Meteorology (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions