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Jet Stream
250 mb isotach
Main Upper Tropospheric Jets Closely Associated with the
Tropopause
Tropopause
Tropopause Height
http://www.atmos.washington.edu/~hakim/tropo/tropo.html
Subtropical Jet Stream
Subtropical Jet Stream Often Associated with a cloud band
• http://itg1.meteor.wisc.edu/wxwise/AckermanKnox/chap7/subtropical_jet.html
Jet Stream’s Relationship to Temperature Can Be Shown
through Thermal Wind Arguments
250 mb isotach
1000-500 mb thickness-large thickness gradient and thus thermal wind near jet core
Or alternatively…
The Jet Stream
Recall the horizontal temperature effectson the pressure:
500 mb
700 mb
850 mb
Warm Cold Psurface
The Jet StreamConsider the balance of forces at each level:
500 mb
700 mb
850 mb
Warm ColdPs
PGFCo
There are a variety of jet stream configurations that are well-
known
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