Jet streams , or just jets in context , are fast flowing , narrow air currents found in the atmosphere of planets at the tropopause , the transition between the troposphere -LRB- where temperature decreases with height -RRB- and the stratosphere -LRB- where temperature increases with height -RRB- .

Jet streams are fast flowing , relatively narrow air currents found at the tropopause , the transition between the troposphere -LRB- where temperature decreases with height -RRB- and the stratosphere -LRB- where temperature increases with height -RRB- , ORGANIZATION@1 .
