QUOTE:
Because major CAT encounters are particularly associated with the edges of the jetstream, then theoretically this is going to both create more opportunities for CAT encounters (as there will be more intersections of the NPJ) and more severe CAT (because of the greater sheer stresses caused by the greater core velocities).
I am/ was a meteorologist as opposed to a climate scientist. I do not know what an "intersection" is in the above context.
What I do know is that the argument assumes that, whereas jetstreams will increase increase in velocity, the surroundings [above, below, left, right] will not.
Otherwise the sheers will not, may not, increase.
Is there a fallacy here?