Abstract
Fluctuations in the vertical wind velocity and air temperature were measured with a 1-dimensional sonic anemometer and fine thermocouple over a flat agricultural site in the Rhone Valley, France. Strong Mistral winds with speeds up to 20 m s−1 kept atmospheric conditions very close to neutral and ensured stationarity. Friction velocities estimated both by eddy correlation (sonic plus Gill Bivane) and inertialdissipation (sonic only) methods agreed within 1 and 5 % respectively of traditional profile measurements over the measured range of 0.2 to 1.2 m s−1. The coefficient of eddy transport for heat exceeded that of momentum by a factor of 1.38 (± 0.05), a result almost identical to that obtained in the Kansas experiment (Businger et al., 1971). For - 0.15 >= z/L >= 0.05, the ratio Σ w /u * was 1.69 and 1.34 for unstable and stable conditions, respectively. For ¦z/L¦ >= 0.05, the ratio Σθ/T * was 1.40 independent of whether neutrality was approached from either stable or unstable conditions.
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McAneny, K.J., Baille, A. & Sappe, G. Turbulence measurements during mistral winds with a 1-dimensional sonic anemometer. Boundary-Layer Meteorol 42, 153–166 (1988). https://doi.org/10.1007/BF00123810
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DOI: https://doi.org/10.1007/BF00123810