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Seasonal and diurnal variability of pressure fluctuation in the infrasound frequency range observed in the Czech microbarograph network
- Source :
- Studia Geophysica et Geodaetica
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- Infrasound environments in the Czech microbarograph network were studied. Reference Fourier amplitude spectra were calculated from data measured at three microbarograph sites of the network in May 2011-April 2012; directional analysis of infrasound arrivals in the frequency band 0.15-0.4 Hz was performed for the microbarograph array at Panska Ves in May 2014-April 2015. Diurnal, seasonal and site-to-site variability of the reference spectra was evaluated. Site-to-site variability is influenced by the location of the respective sensors in the open air and inside the observatory buildings and by local noise phenomena like wind turbines. Diurnal variability is well developed in summer with maximum ambient noise levels during the daytime and minima at night. Seasonal variability is observed at night with maxima in winter and minima in summer. Wind and wind eddies seem to be an important source of ambient noise in measurements in the Czech microbarograph network. A distinct spectral peak occurs near 0.2 Hz with amplitudes by about one order of magnitude higher in winter than in summer. Its seasonal variability is related to seasonal propagation of microbaroms from the source region in the Northern Atlantic.
- Subjects :
- Daytime
010504 meteorology & atmospheric sciences
Frequency band
Infrasound
Ambient noise level
010502 geochemistry & geophysics
7. Clean energy
01 natural sciences
Microbarom
Geophysics
Amplitude
Eddy
13. Climate action
Geochemistry and Petrology
Climatology
Environmental science
Noise (radio)
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 15731626 and 00393169
- Volume :
- 60
- Database :
- OpenAIRE
- Journal :
- Studia Geophysica et Geodaetica
- Accession number :
- edsair.doi.dedup.....6eefe9c2a0c11313c87d1890938303e2