# QG theory part 3 vorticity Flashcards

1
Q

It can be shown that the rate of change of vorticity is strongly dominated by two processes

(change of vorticity with time)

A
• Divergence
2
Q

A
3
Q

Divergence is resembled by

A
4
Q

Vorticity

A

Rotation of wind around vertical axis (cyclonic or anticyclonic) vertical or in a slope

5
Q

storm has …………. vorticity

A

large

6
Q

How to get vorticity equation?

A
1. using horizontal component of momentum equation (zonal and meridional)
2. take the derivative of y of u component (zonal)
3. take the derivative of x of v component (meridional)
4. rearange
5. subtract (meridional-zonal)
6. simplify by scale analysis
7
Q

vorticity equation:

A
8
Q

term A means

A

local term

9
Q

term b means

A

10
Q

term c means

A

constant (coriolis parameter) & divergence

11
Q

what does the equation mean?

A

vorticity is changing due to vorticity advection and divergence

12
Q

the divergence term describe

A

the effects of divergence on the change of vorticity within a fluid.

13
Q

When divergence occurs in a fluid, vorticity becomes more …………………

A

anticyclonic

14
Q

When…………………… occurs in a fluid, vorticity becomes more anticyclonic

A

divergence

15
Q

When convergence occurs in a fluid, vorticity becomes more ……………..

A

cyclonic

16
Q

When ………………………..occurs in a fluid, vorticity becomes more cyclonic

A

convergence

17
Q

When divergence occurs in a fluid, vorticity becomes more anticyclonic. Thus, …………………………spins up …………………………..vorticity

A

convergence, cyclonic

18
Q

When ………………….occurs in a fluid, vorticity becomes more ……………………. Thus, convergence spins up cyclonic vorticity

A

divergence, anticyclonic

19
Q

Surface low-pressure centers are characterized by ………………………….and thus tend to be foci for the production of low-level cyclonic vorticity.

A

convergence

20
Q

Surface low-pressure centers are characterized by convergence and thus tend to be ……………………………………………………..

A

foci for the production of low-level cyclonic vorticity.

21
Q

upper divergence results in vorticity….

A

anticyclonic

22
Q

upper convergence results in……

A

cyclonic

23
Q

vorticity cyclonic (+ve or -ve)

A

+ve vorticity

24
Q

vorticity anticyclonic (+ve or -ve)

A

-ve vorticity

25
Q

Upstream of the trough, the geostrophic wind is directed from the ……………………………towards the ……………………………

A

vorticity minimum, vorticity maximum

26
Q

………………………………………., the geostrophic wind is directed from the vorticity minimum towards the vorticity maximum.

A

Upstream of the trough

27
Q

Downstream of the trough, the geostrophic wind is directed from the …………………………………. towards the ……………………………

A

vorticity maximum, vorticity minimum

28
Q

…………………………………………, the geostrophic wind is directed from the vorticity maximum towards the vorticity minimum.

A

Downstream of the trough,

29
Q

Note that regions of maximum vorticity advection is collocated with regions of …………………………………….

A

divergence

30
Q

Note that regions of …………………………………vorticity advection is collocated with regions of divergence

A

maximum

31
Q

Term A

A

Vorticity minimum in the ridges

32
Q

Term B

A

33
Q

Term C

A

34
Q

Term D

A

Vorticity max in the trough

35
Q

The most important application of QG theory is

A

the diagnosis of vertical motion

36
Q

The fundamental equation of QG theory indicate that ………………….and ……………………………………are dynamically forced by two mechanisms: