Chapter 11 - Jetstreams

Question 1

Polar front jet

Answer 1

Between polar cell + ferrel cell where there is large temp change at a ‘junction’

Jet stream forms in warmer airmass

Question 2

Sub-tropical jet

Answer 2

Between ferrel cell + Hadley cell where there is large temp change at a ‘junction’

Jet stream forms in warmer airmass

Question 3

Thermal equator

Answer 3

Latitude where highest temps are expected
Point of max convection
Band of low pressure due to convection

Follows the sun eg most northerly position in June + most southerly position in December

Question 4

Jet stream distribution

Answer 4

Permanent cell junction between polar front jet and subtropical jet

Seasonal cell junction between tropical easterly jet + arctic front jet

Question 6

Jet streams are at their strongest in

Answer 6

Winter

Question 7

Jet streams are at their weakest in

Answer 7

Summer

Question 8

Jet stream dimensions

Answer 8

Fastest wind speed occurs in the core

2 nm (12000 ft) deep,
200 nm across,
2000 nm long