Discussion
Which effect does moving to a higher latitude have for a fixed pressure gradient?
Answer: B
Since the geostrophic wind equals the pressure gradient force divided by \( f \), and \( f \) increases with latitude, the same isobar spacing corresponds to a weaker wind nearer the pole. Physically, the stronger Coriolis force can balance the same pressure gradient at a lower speed. The effect is substantial in practice: the same spacing gives roughly forty per cent more wind at thirty degrees than at sixty, which forecasters allow for when reading charts spanning a wide range of latitude.
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