Reconstruction of the surface-layer vertical structure from measurements of wind,temperature and humidity at two levels |
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Authors: | Luc Musson-Genon Eric Dupont Denis Wendum |
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Institution: | (1) Centre d’Enseignement et de Recherche en Environnement Atmosphérique (CEREA), Joint Laboratory ENPC/EDF R&D, 6 Quai Watier, BP49, Chatou Cedex, 78401, France |
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Abstract: | We present a comparison between several methods used to reconstruct fluxes and vertical profiles of wind, temperature and
humidity from measurements at two levels in the atmospheric surface layer for different practical applications. An analytical
method and an iterative method are tested by evaluating the quality of estimations of surface fluxes from detailed field measurements
obtained during a campaign on the site of Lannemezan in the south-west of France. The iterative method yields better results,
but the analytical one can give results of the same level of accuracy provided that specific constants in its formulation
are modified. Then these techniques are applied to wind and temperature reconstruction for an experiment dedicated to wind
power estimates over flat terrain. If turbulent fluxes are not needed, a simple power law appears to be sufficient, as the
method based on Monin–Obukhov theory does not improve the accuracy of the vertical profile reconstruction. |
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Keywords: | Modelling-measurement comparisons Monin– Obukhov similarity Surface layer Turbulent fluxes Vertical profiles |
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