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

Discussion

Which model error results from omitting gravity wave drag?

  • A.Excessive rainfall
  • B.A surface pressure field that drifts steadily away from observation over the course of the integration
  • C.A polar night jet that is much too strong
  • D.A tropical circulation that is far too weak because the momentum transport into the tropics is missing

Answer: C

The cold pole problem, in which the modelled winter polar vortex is too strong and too cold, was a longstanding defect traced directly to missing wave drag. Adding an orographic gravity wave drag scheme largely resolved it. The other errors listed arise from quite different deficiencies in convection, microphysics and numerical conservation.

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

Post your comment

Please log in or register to post a comment.