Depressions And Anticyclones

Question 1

Air masses

Answer 1

Extremely large bodies of air with fairly constant temp and humidity characteristics (thousands of km wide)
Characteristics determined from where they came from

Question 2

Cold front

Answer 2

/\ /\ /. Blue

Question 3

Warm front

Answer 3

(
(
(. Red

Question 4

Occluded

Answer 4

Mixed blue and red

Question 5

Atmospheric pressure

Answer 5

Weight of gases pressing down on the surface of the earth
Measured in millibars (mb)
Average = 1,000 mb

Question 6

Front

Answer 6

The line that separates two air masses

Question 7

High pressure

Answer 7

Air sinking

Question 8

Low pressure

Answer 8

Air rising

Question 9

U.K. From north e

Answer 9

Arctic maritime

Cold
Humid

Question 10

U.K. From north w

Answer 10

Polar maritime

Cold
Humid

Question 11

U.K. From mid e

Answer 11

Polar continental

Cold
Dry

Question 12

U.K. From s e

Answer 12

Tropical continental

Dry
Warm

Question 13

U.K. From s w

Answer 13

Tropical maritime

Humid
Warm

Question 14

Depression

Answer 14

Low pressure system that brings clouds and rain

Question 15

How depression form over U.K.

Answer 15

Forms over Atlantic Ocean
Front develops
Wave developing in the front as warm air rises over cold
Beginning forms w distinctive leading warm front

Question 16

Depression stage 1

Before warm front

Answer 16

Cold temps

No precipitation

Question 17

Depression stage 2

Warm front

Answer 17

Temps rising
Air rises
Lowering clouds
Precipitation steady 
Falling pressure
Citrus > altostratus > nimbostratus

Question 18

Depression stage 3

Warm sector

Answer 18

Clear and dry

Mild temps

Question 19

Depression stage 4

Cold front

Answer 19

Colder air
Forces hot air upwards 
Cumulonimbus clouds form
Heavy rainfall/ thunderstorms 
Heavy winds
Rising pressure

Question 20

Depression stage 5

After cold front

Answer 20

Cool air

A few showers

Question 21

Occluded front

Answer 21

Cold front catches up w warm front

Steady rainfall and then eventually dies
As warm air pushed up from the surface and cold air sinks
Cold front - 40-50mph
Warm front- 20-30mph

Question 22

Anticyclone def

Answer 22

High pressure systems which bring stable and dry weather

Question 23

Anticyclone characteristics

Answer 23

High atmospheric pressure
Large in size (>3000km across)
Brings clear cloudless conditions resulting in sunny days
Brings gentle winds that blow in the clockwise direction
Can occur in summer and winter

Question 24

Anticyclone dry weather

Answer 24

Air is sinking

Is warm enough to hold water and not condense into clouds/ rain

Question 25

Anticyclone little wind

Answer 25

Huge systems
Have little differences in pressure throughout
This gentle pressure grad means air isn’t moving quickly to take the place of rising air

Question 26

Anticyclone cold winter weather

Answer 26

Clear skies lead to little insulation during long night

Allows for more heat loss

Question 27

Anticyclone warm summer weather

Answer 27

Cloudless skies leads to less absorption of the Suns Rays during long hours of sunshine

Question 28

Anticyclone frost

Answer 28

Clear skies allow heat loss from the ground at night causing the moisture in contact with the ground to condense into ice

Question 29

Anticyclone fog

Answer 29

Clear skies allow heat to be just by radiation overnight
Cold air sinks into valleys and other low areas
Cannot hold water leading to condensation forming around dust particles warm air sinks down on the cold air trapping it and causing an inversion of temperature

Question 30

Depression characteristics

Answer 30

Low Atmos pressure below 1000mb
Centre of depression has lowest air pressure
Winds blow in anti-clockwise direction
Unsettled weather periods w plenty of wind and rain