Relationships between structure functions and temperature ramps in the atmospheric surface layer |
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| Authors: | R A Antonia A J Chambers E F Bradley |
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| Institution: | (1) Department of Mechanical Engineering, University of Newcastle, 2308 Newcastle, N.S.W., Australia;(2) CSIRO Division of Environmental Mechanics, P.O. Box 821, 2601 Canberra City, A.C.T., Australia |
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| Abstract: | The behaviour of odd-order structure functions of temperature in the atmospheric surface layer is consistent with the presence of a coherent structure characterised by temperature ramps. The use of a simple linear model for the ramp together with measurements of second-, third-, and fifth-order temperature structure functions yields estimates for the characteristic mean amplitude and repetition interval of ramps for stability conditions ranging from neutral to moderately unstable. Both amplitude and repetition interval compare favourably with values derived from observations of temperature traces obtained simultaneously at two heights in the surface layer. |
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