Diurnal Variation of Wind and Temperature Fields in the Ekman Layer

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Abstract
The diurnal variation of the wind and temperature fields in the Ekman layer is studied by solving the equation of motion and of heat conduction. Eddy diffusivity is assumed to take the values which are evaluated by the extrapolated use of a modified KEYPS equation to the Ekman layer. With regard to the boundary conditions, the standard lapse-rate is assumed at the upper boundary and a constant temperature is assumed at the lower boundary which is set up in the soil. In this kind of study, hitherto, the constant flux layers near the surface are assumed in order to avoid a large amount of calculation, but in the present work, the original prognaustic equations of the whole layer are directly integrated by use of the matrix method for finite difference equations. Computation is carried out until cyclic solutions of one day period are obtained.The computed results are compared with observations available to us at present.

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