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On backward scattering of acoustic waves in a turbulent atmosphere and intensity of SODAR echo-signals

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The backscattering of acoustic waves in the atmosphere has been studied with an absolutely calibrated sodar and a measuring complex at a 300-m meteorological mast (HMM). It has been shown that the backward differential cross-section of the atmosphere and excess attenuation of sound are by an order of magnitude greater than formerly recognized. The effects have been qualitatively justified on the basis of consideration of the small-scale turbulence intermittence and a model of sound scattering on the ensemble of local inhomogeneities.

German
Es wurden Untersuchungen zur Rückstreuung von akustischen Wellen in der Atmosphäre ausgeführt, indem ein Sodar, welches absolut kalibriert wurde, und ein Messkomplex auf einem 300 m hohen Meteorologieturm benutzt wurden. Es wurde gezeigt, dass der Rückstreuquerschnitt der Atmosphäre und die zusätzliche Abschwächung des Schalls um eine Größenordnung höher sind als man bisher vermutet hatte. Der Effekt wurde quantitativ und qualitativ überprüft. Basis für die Untersuchung waren die Berücksichtigung der kleinskaligen Intermittenz der Turbulenz und ein Modell für die Streuung von Schall an Luftschichten mit lokalen Inhomogenitäten.
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Document Type: Research Article

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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