Infrasound as a Detector of Local and Remote Turbulence

J. Cuxart, D. Tatrai, T. Weidinger, A. Kircsi, J. Józsa, M. Kiss

Research output: Contribution to journalLetter

Abstract

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.

Original languageEnglish
Pages (from-to)185-192
Number of pages8
JournalBoundary-Layer Meteorology
Volume159
Issue number2
DOIs
Publication statusPublished - May 1 2016

Keywords

  • Elevated turbulence
  • Infrasound
  • Microphones
  • Turbulence detector

ASJC Scopus subject areas

  • Atmospheric Science

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