Discussion
Consider the following pairs of region and vertical motion.
Ahead of a warm front - ascent
Behind a cold front - descent
Right entrance of a jet streak - ascent
Centre of an anticyclone - ascent
How many of the pairs given above are correctly matched?
Answer: B
The centre of an anticyclone is a region of subsidence, produced by frictional divergence at the surface, so the last pairing is wrong. The other three are correct. Assembling the standard regions of ascent and descent into a single mental map is one of the most practically useful things this topic offers, since it converts a chart directly into a cloud and rainfall forecast.
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