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Wind and temperature profile prediction for diabatic surface layers including strong inversion cases
Authors:Heinz H Lettau
Institution:(1) The University of Wisconsin at Madison, Dept. of Meteorology, Madison, Wis., USA
Abstract:The micrometeorological research program in Antarctica has provided extensive data on wind and temperature profile structure under strong to extreme inversion conditions (Dalrymple et al., 1966; Lettau et al., 1977). The basic similarity hypotheses and limiting conditions for prediction of diabatic surface layer profiles are summarized. The model by Businger et al. (1971) for dimensionless shear and temperature gradients is revised to conform with the new results for strong stability. A novel similarity hypothesis is introduced to complete the step from shear and gradient prediction to prediction of absolute wind speed, wind energy, and temperature on the basis of prescribed external factors of surface layer structure. The physics of interactions between predicted profile lsquotiltingrsquo and lsquocurvingrsquo are discussed and used to explain several micrometeorological paradoxes, including that of the lsquoelevated minimum of air temperaturersquo observed occasionally near the active surface when the energy budget is of the nocturnal type.
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