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The wind speed shear in the case of stable stratification and the scales of the similarity theory

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Abstract

The wind speed shear in the case of stable stratification in the linear part of the profile spreading high above the surface layer of constant flows is studied using the data of long-term sodar measurements in the atmospheric boundary layer. The wind speed shear in this part remains almost invariable during several hours at the significant change in parameters of the Monin-Obukhov theory. The length of this linear part can be associated with the layer of the critical Richardson number. In the case of the pronounced temperature inversion (with the positive gradient of more than 1°C per 100 m), the wind speed profile is close to the linear function in the most part of the nocturnal mixing layer. Proposed is a scale characterizing the height of the surface layer of constant flows.

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Authors and Affiliations

  1. Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow, 119991, Russia

    V. P. Yushkov

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  1. V. P. Yushkov
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Original Russian Text © V.P. Yushkov, 2013, published in Meteorologiya i Gidrologiya, 2013, No. 12, pp. 37–51.

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Yushkov, V.P. The wind speed shear in the case of stable stratification and the scales of the similarity theory. Russ. Meteorol. Hydrol. 38, 818–827 (2013). https://doi.org/10.3103/S1068373913120030

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