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Arrange the following steps of the kinematic method in order.

1. Apply the O'Brien correction

2. Compute the horizontal divergence at each level

3. Integrate upward from the surface

4. Analyse the observed wind field

Select the correct sequence.

  • A.3, 2, 4, 1
  • B.4, 2, 3, 1
  • C.1, 2, 3, 4
  • D.2, 4, 3, 1

Answer: B

The wind field is analysed first, the divergence is computed from it at each level, the profile is integrated upward from the lower boundary condition, and finally the result is corrected so that omega vanishes at the top, giving 4, 2, 3, 1. Setting the sequence out explicitly makes clear where the error enters and why the final correction is needed rather than optional.

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