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Which relationship exists between tilt and energy conversion?

  • A.Eastward tilt allows the disturbance to extract kinetic energy from the mean flow around it directly
  • B.Tilt has no energetic role
  • C.Vertical alignment maximises the conversion because the circulations at the two levels then reinforce
  • D.Westward tilt allows potential energy to be converted to kinetic energy

Answer: D

A westward tilt with height means warm air rises and cold air sinks systematically, lowering the centre of gravity of the atmosphere and releasing available potential energy as kinetic energy. Eastward tilt reverses the conversion and describes a decaying system. Vertical alignment gives no net conversion at all, which is precisely why a vertically stacked low stops deepening.

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