Jetstreams Influencing Weather

Question 1

What are the two types of jet streams

Answer 1

Polar front jet stream
Subtropical jet stream

Question 2

Where does the PFJS occur

Answer 2

The PFJS occurs between the latitudes 40-60N/S of the equator in both hemispheres

Question 3

What does the PFJS form the division between (which is the boundary between?)

Answer 3

The PFJS forms the division between the Ferrell and Polar cells which is the boundary between warm and cold air

Question 4

In the Northern Hemisphere what weather does the PFJS bring when it zigzag zags south what conditions are brought

Answer 4

The PFJS zig zags south bringing cold air with it. This cold air decends in a clockwise direction to give dry and stable conditions (associated with high pressure anticyclones)

Question 5

In the Northern Hemisphere what weather does the warmed PFJS bring when it veers northwards

Answer 5

When travelling north the PFJS takes warm air with it which rises in an anti-clockwise direction giving strong winds and heavy rainfall and low pressure (depressions)

Question 6

In the British isles explain our frequent wet and windy weather

Answer 6

The PFJS travels in a NE direction over the British isles In the Northern Hemisphere what weather does the PFJS bring when it which explains our frequent wet and windy weather

Question 7

Where does the STJS occur

Answer 7

The STJS occurs about 25-30N/S from the equator

Question 8

What does the STJS form the border between

Answer 8

The STJS forms the border between Hadley and Ferrel cells

Question 9

Describe how the STJS travels

Answer 9

The STJS meanders less and has lower wind velocities but follows a similar west to east pattern

Question 10

Where are jet streams found

Answer 10

At the centre of geostrophic winds

Question 11

What are the upper westerlies

Answer 11

Within the westerly winds there are bands of extremely fast moving air called jet streams

Question 12

What does the jet streams help with in the upper westerlies and what speeds are exceeded

Answer 12

Helps with rapid transfer of energy which can exceed speeds of 230km/h

Question 13

In summer where does the polar front jet stream flow and what weather is brought

Answer 13

PFJS flows to the north of the uk it pulls warm air up from tropical regions, bringing warm anti cyclonic conditions resulting in warm summer

Question 14

In winter where does the polar front jet stream flow and what weather is brought

Answer 14

PFJS flows south of the uk bringing cold polar air and depressions with it, resulting in very cold, wet and snowy winters in uk