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

Discussion

Which consequence does downstream development have for predictability?

  • A.Analysis errors propagate rapidly downstream
  • B.Forecast skill increases with lead time because the wave energy carries additional information forward
  • C.It has no consequence
  • D.Errors remain confined near their point of origin for as long as the wave train continues to propagate

Answer: A

Errors in a data-sparse region travel downstream at the group velocity, faster than the systems themselves, contaminating forecasts far from their origin within a day or two. This is one reason global observational coverage matters for regional forecasting. Confinement of errors is exactly what does not happen, and skill declines rather than improves with lead time. 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.