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The vertical structure of turbulent momentum flux in the lower part of the atmospheric boundary layer

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Abstract:

The acoustic sounder (sodar) can be used to measure the parameters of turbulence in the lower part of the atmospheric boundary layer. We suggest a new method to estimate the vertical structure of the momentum flux up to the height of several hundred meters above the surface. The method uses sodar-measured profiles of mean wind and of the variance of vertical wind component σ. The field experiment have shown a good agreement of sodar-derived momentum flux values with those measured . We obtained the typical profiles of momentum flux with the method.

German
Das akustische Fernmessgerät Sodar kann benutzt werden, um Turbulenzparameter im unteren Teil der atmosphärischen Grenzschicht zu messen. Wir schlagen eine neue Methode vor, das Vertikalprofil des turbulenten Impulsflusses bis zu einer Höhe von einigen hundert Metern über dem Boden abzuschätzen. Die Methode basiert auf den mit dem Sodar gemessenen Vertikalprofilen der mittleren Windgeschwindigkeit und der Varianz der vertikalen Windkomponente σ2 w . Feldexperimente haben eine gute Übereinstimmung des mit dem Sodar bestimmten Impulsflusses mit in-situ-Messungen gezeigt. Die Impulsflussprofile zeigen das erwartete Verhalten.

Document Type: Research Article

DOI: https://doi.org/10.1127/0941-2948/2007/0205

Publication date: 2007-08-01

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  • Meteorologische Zeitschrift (originally founded in 1866) is the joint periodical of the meteorological societies of Austria, Germany and Switzerland. It accepts high-quality peer-reviewed manuscripts on all aspects of observational, theoretical and computational research out of the entire field of meteorology, including climatology. Meteorologische Zeitschrift represents a natural forum for the meteorological community of Central Europe and worldwide.
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