Extratropical Cyclones

Question 1

Winds follow

Answer 1

Isobars

Question 2

Winter polar continental

Answer 2

Cold and dry

Question 3

Summer polar continental

Answer 3

Warm and dry

Question 4

Conditions associated with winter polar continental

Answer 4

Sno

Question 5

Tropical continental

Answer 5

Hot and dry, low visbility

Question 6

Polar maritime

Answer 6

Cool and moist

Question 7

Returning polar maritime

Answer 7

Mix between polar and tropical maritime conditions

Question 8

Arctic maritime

Answer 8

Cold and dry, can lead to snow and hail

Question 9

Three wind cells

Answer 9

Hadley, Ferrel, polar

Question 10

Hadley cell - Hadley cell

Answer 10

Convergence

Question 11

Ferrel cell - Hadley cell

Answer 11

Divergence

Question 12

Polar cell - Ferrel cell

Answer 12

Convergence

Question 13

Diverging air produces

Answer 13

High pressure

Question 14

Polar jet stream is associated with

Answer 14

Ferrel cell and polar cell

Question 15

Subtropical jet occurs between

Answer 15

Ferrel cell and Hadley cell

Question 16

Thermal wind relation

Answer 16

Pressure decreases with height quicker in cold air

Question 17

Vertical wind gradient is proportional to the

Answer 17

Horizontal temperature gradient

Question 18

Undercutting of polar air under subtropical air makes the jet stream

Answer 18

Narrower

Question 19

The jet stream is stronger in the

Answer 19

Winter hemisphere

Question 20

Small waves on jet stream can amplify, thus it is

Answer 20

Baroclinically unstable

Question 21

Perturbations to the jet stream (causing Rossby waves)

Answer 21

Mountains, uneven heating

Question 22

Extratropical cyclone stage 1

Answer 22

Upper level disturbance causes divergence aloft, low pressure system. Rotation develops around the low.

Question 23

Convergence in the low promotes

Answer 23

Air to rise

Question 24

Extratropical cyclone stage 2

Answer 24

Northerly air pushes cold front forward

Question 25

Extratropical cyclone stage 3

Answer 25

Warm air pushed above the warm front, cold front catches up

Question 26

Extratropical cyclone stage 4

Answer 26

Cold front overtakes, forming occluded front. Begins at centre and expands out. Inflowing air weakens low, dissipates system

Question 27

In extratropical cyclones, the low pressures can become

Answer 27

Stacked

Question 28

The precipitation in ET cyclone is focused at the

Answer 28

Occlusion

Question 29

Occlusion can form from the

Answer 29

Isothermal wrapping