ESS200A
Prof. Jin-Yi Yu
Subtropical
and Polar Jet Streams
q Subtropical Jet
Located at the higher-latitude end of the Hadley
Cell. The jet obtain its maximum wind speed (westerly) due the conservation of angular momentum.
q Polar Jet
Located at the thermal boundary between
the tropical warm air and the polar cold air. The jet obtain its maximum
wind speed (westerly) due the latitudinal thermal gradient (thermal wind
relation).
(from Atmospheric Circulation Systems)