Global InformationMicrobarom information
In acoustics, microbaroms, also known as the "voice of the sea",[1][2] are a class of atmospheric infrasonic waves generated in marine storms[3][4] by a non-linear interaction of ocean surface waves with the atmosphere.[5][6] They typically have narrow-band, nearly sinusoidal waveforms with amplitudes up to a few microbars,[7][8] and wave periods near 5 seconds (0.2 hertz).[9][10] Due to low atmospheric absorption at these low frequencies, microbaroms can propagate thousands of kilometers in the atmosphere, and can be readily detected by widely separated instruments on the Earth's surface.[5][11]
- ^ Bowman, H. S.; Bedard, A. J. (1971). "Observations of infrasound and subsonic disturbances related to severe weather". Geophys. J. R. Astron. Soc. 26 (1–4): 215–242. Bibcode:1971GeoJ...26..215B. doi:10.1111/j.1365-246X.1971.tb03396.x.
- ^ Bedard, A. J.; Georges, T. M. (2000). "Atmospheric infrasound" (PDF). Physics Today. 53 (3): 32–37. Bibcode:2000PhT....53c..32B. doi:10.1063/1.883019.
- ^ "Microbarom". Mcgraw-Hill Dictionary of Scientific and Technical Terms. McGraw-Hill. 2003. ISBN 978-0-07-042313-8.
- ^ "Microbaroms". Infrasonic Signals. University of Alaska Fairbanks, Geophysical Institute, Infrasound Research Group. Archived from the original on 2008-02-15. Retrieved 2007-11-22.
- ^ a b Garcés, M. A.; Hetzer, C. H.; Willis, M.; Businger, S. (2003). "Integration Of Infrasonic Models With Ocean Wave Spectra And Atmospheric Specifications To Produce Global Estimates Of Microbarom Signal Levels". Proceedings of the 25th Seismic Research Review. pp. 617–627.
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Waxler, R.; Gilbert, K. E. (2006). "The radiation of atmospheric microbaroms by ocean waves". Journal of the Acoustical Society of America. 119 (5): 2651. Bibcode:2006ASAJ..119.2651W. doi:10.1121/1.2191607.
The acoustic radiation which results from the motion of the air/water interface is known to be a nonlinear effect.
- ^ Cite error: The named reference
Arendt2000was invoked but never defined (see the help page). - ^ Donn, W. L.; Rind, D. (1972). "Microbaroms and the Temperature and Wind of the Upper Atmosphere". Journal of the Atmospheric Sciences. 29 (1): 156–172. Bibcode:1972JAtS...29..156D. doi:10.1175/1520-0469(1972)029<0156:MATTAW>2.0.CO;2.
- ^ Olson, J. V.; Szuberla, C. A. L. (2005). "Distribution of wave packet sizes in microbarom wave trains observed in Alaska". Journal of the Acoustical Society of America. 117 (3): 1032. Bibcode:2005ASAJ..117.1032O. doi:10.1121/1.1854651.
- ^ Down, W. L. (1967). "Natural Infrasound of Five Seconds Period". Nature. 215 (5109): 1469–1470. Bibcode:1967Natur.215.1469D. doi:10.1038/2151469a0. S2CID 4164934.
- ^ Willis, M. C.; Garces, M.; Hetzer, C.; Businger, S. (2004). "Source Modeling of Microbaroms in the Pacific" (PDF). AMS 2004 Annual Meeting. Retrieved 2007-11-22.