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

Discussion

Which practical consequence does that bias have?

  • A.Forecast wind speeds at the surface are too light because the mixing fails to bring momentum down from above
  • B.Forecast minimum temperatures are too high on clear calm nights
  • C.Forecast maximum temperatures are too low, since the excessive mixing removes heat from the surface during the day
  • D.There is no consequence

Answer: B

Excessive mixing brings warm air down to the surface and prevents the strong radiative cooling that actually occurs, so minima are forecast too high and frost and fog are underpredicted. Forecasters routinely adjust for this known bias. Surface winds are forecast too strong rather than too light for the same reason.

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

Post your comment

Please log in or register to post a comment.