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

Discussion

Which contribution does latent heat release make to the vertical motion?

  • A.It has no effect on the vertical motion field within a large scale system of this kind
  • B.It reverses the sign of the vertical motion once the air within the ascending column becomes saturated
  • C.It amplifies the ascent by reducing the effective static stability
  • D.It suppresses the ascent because the heating warms the ascending air and reduces its buoyancy further

Answer: C

Condensational heating within the ascending air offsets the adiabatic cooling, so the effective stability of the saturated ascent is much lower and the same forcing produces a stronger vertical motion. This feedback typically doubles the ascent in the warm conveyor belt. It is represented in the omega equation by adding a diabatic term, and it is one reason moist models forecast deeper cyclones than dry ones. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.

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

Post your comment

Please log in or register to post a comment.