The diurnal pressure variation is most noticeable in the __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — doldrums
Diurnal pressure variation is a regular, solar-driven twice-daily atmospheric oscillation most pronounced in the tropics or doldrums. Bowditch explains that this predictable semi-diurnal wave provides a baseline for evaluating synoptic weather changes in low latitudes.
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