Jet Stream. 250 mb isotach Main Upper Tropospheric Jets Closely Associated with the Tropopause.
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Transcript of Jet Stream. 250 mb isotach Main Upper Tropospheric Jets Closely Associated with the Tropopause.
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