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

Discussion

Which observation reveals the weak temperature gradients of the tropical troposphere?

  • A.The tropopause is found at a much lower altitude in the tropics than it is in the middle latitudes
  • B.Soundings from widely separated tropical stations agree closely
  • C.The surface pressure varies by many hectopascals between neighbouring stations across the tropical belt
  • D.The winds are very strong

Answer: B

Because the Coriolis parameter is small, any temperature gradient is rapidly removed by gravity waves, so tropical soundings hundreds or thousands of kilometres apart are remarkably similar. This weak temperature gradient approximation underlies much of tropical dynamics. Tropical pressure gradients are correspondingly weak, winds are generally light outside disturbances, and the tropical tropopause is in fact higher and colder than the mid-latitude one.

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

Post your comment

Please log in or register to post a comment.