MET Q5 - Pressure Systems

Question 1

The high pressure system which dominates the North Atlantic in summer is:
(select one)

a.Canadian

b.Aleutian

c.Azores

d.Greenland

Answer 1

c.Azores

Question 2

A cross section of a warm high pressure system would show
(select one)

a.Pressure levels bulging upwards in the lower levels and bulging upwards in the upper levels

b.Pressure levels bulging downwards in the lower levels and bulging upwards in the upper levels

c.Pressure levels bulging upwards in the lower levels and downwards in the upper levels

d.Pressure levels are horizontal in the lower levels and bulging upwards in the upper levels

Answer 2

a.Pressure levels bulging upwards in the lower levels and bulging upwards in the upper levels

Question 3

High pressure areas are generally cloudless because
(select one)

1.sinking air is heated by compression

2.rising air is heated by expansion

3.sinking air is heated by expansion

4.rising air is cooled by compression

Answer 3

1.sinking air is heated by compression

Question 4

In temperate latitudes what weather conditions may be expected over land during the summer and winter in the centre of a stationary high pressure zone?
(select one)

a.Summer: Cumulonimbus cloud, thunderstorms; Winter: Fog, haze

b.Summer: Nimbostratus; Winter: Mist, rain

c.Summer: Calm winds, haze; Winter: fog, low stratus

d.Summer: Thunderstorms, showers; Winter: Cumulonimbus cloud with continuous rain.

Answer 4

c.Summer: Calm winds, haze; Winter: fog, low stratus

Question 5

Typical weather with a high pressure system over Europe in summer is
(select one)

1.thunderstorms

2.calm winds, haze

3.showers

4.dense cloud

Answer 5

2.calm winds, haze

Question 6

Which of the following best describes Zone C?
(select one)

a.Col

b.Ridge of high pressure

c.Anticyclone

d.Trough of low pressure

Answer 6

d.Trough of low pressure

Question 7

A blocking anti-cyclone
(select one)

a.is associated with cloud and precipitation

b. typically moves at a speed of 15 - 20kts

c.forms between two depressions

d.deflects other systems from their usual track

Answer 7

d.deflects other systems from their usual track

Question 8

Extensive cloud and precipitation is often associated with a depression because of
(select one)

a.Surface divergence and upper level convergence causing widespread ascent of air in the depression

b.Surface divergence and upper level convergence causing widespread descent of air in the depression

c.Surface convergence and upper level divergence causing widespread ascent of air in the depression

d.Surface convergence and upper level divergence causing widespread descent of air in the depression

Answer 8

c.Surface convergence and upper level divergence causing widespread ascent of air in the depression