Machine-translated by Google. Questions are authored in English.
Top

Discussion

Which motion does poleward flow along a sloping isentropic surface produce?

  • A.Ascent in summer and descent in winter, according to the direction in which the temperature gradient points
  • B.Ascent
  • C.Descent, because the surfaces slope downward towards the pole where the air is colder and denser than it is
  • D.No vertical motion

Answer: B

Isentropic surfaces slope upward towards the cold pole, so a parcel moving poleward along one must rise, which is precisely the ascent that warm advection produces. Equatorward flow correspondingly descends. This is the same result the omega equation gives, arrived at by a much more direct route that also shows the trajectory.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.