Originally Posted by
FRQ Charlie Bravo
What I want to know is why the temperature is increasing. Having started in the warmer air column to the North (which causes the thermal wind which in turn does the coriolis trick and becomes the Jet Stream) why is the temp increasing?
It's been about 3 years since I did ATPL Met, but from what I remember, CAT can occur in the vicinity of the jetstreams at heights near the tropopause. The fact that the temperature is increasing suggests that at FL370, you are infact above the tropopause and in the stratosphere where temperature increases with height.
So, if you're maintaining FL370 and heading south with OAT temperature increasing, this means the tropopause is getting lower as you head south. And if the CAT occurs in the vicinity of the tropopause, then by maintaining FL370, you are infact distancing yourself from the area of CAT.
Thus, in answering the question, "do nothing" would seem to be the correct answer, but as always, I'm happy to be corrected.
