Infrasound as a Detector of Local and Remote Turbulence
| Autor: | Andrea Bíróné Kircsi, Joan Cuxart, János Józsa, Dávid Tátrai, Tamás Weidinger, Melinda Kiss |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Atmospheric Science 010504 meteorology & atmospheric sciences Turbulence Microphone Infrasound Acoustics Detector SODAR 010502 geochemistry & geophysics 01 natural sciences Seismic wave Physics::Fluid Dynamics Anemometer Turbulence kinetic energy 0105 earth and related environmental sciences |
| Zdroj: | Boundary-Layer Meteorology. 159:185-192 |
| ISSN: | 1573-1472 0006-8314 |
| DOI: | 10.1007/s10546-015-0100-2 |
| Popis: | Infrasound measurements are used to detect seismic waves and a large effort is devoted to eliminating the turbulence-related infrasound signal, usually considered as noise. Here we take a complementary approach, investigating whether infrasound can provide information on atmospheric turbulence. Microphone measurements of infrasound from an experimental campaign in Hungary in 2013 are used, together with data from a nearby sonic anemometer and a sodar. The comparison of infrasound integrated spectral energy to turbulent kinetic energy from the sonic provides a good match when turbulence is present near the ground. Moreover, on stable nights when the surface layer is strongly stratified and with turbulence absent, microphones sometimes recorded infrasound when the sodar showed a low-level jet above the surface inversion, indicating that microphones may be used as detectors of elevated turbulence. |
| Databáze: | OpenAIRE |
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