Analysis of information sources in references of the Wikipedia article "Microbarom" in English language version.
The Earth's crust can be regarded as a time-invariable medium. By comparing microbaroms and microseisms, this permits a monitoring of acoustic channels to be carried out.
Microbaroms are infrasonic waves generated by nonlinear interactions of ocean surface waves traveling in nearly opposite directions with similar frequencies. Such interactions commonly occur between ocean waves with approximately 10-second periods, which are abundant in the open oceans and correspond to the observed 0.2 Hz infrasonic spectral peak.
When we perform a least-squares fit to plane-wave arrivals on the data we find the apparent source azimuth points to the center of the storm low-pressure center.
The acoustic radiation which results from the motion of the air/water interface is known to be a nonlinear effect.
We show that because of the phase speed mismatch between surface gravity waves and acoustic waves, a single surface wave radiates only evanescent acoustic waves.
Infrasound signals in the microbarom band (about 0.2 Hz) generated by hurricanes often do not appear to originate near the eye where the winds are strongest. This paper suggests that conditions conducive to microbarom (and microseism) generation can occur along the trailing periphery of the storm through the interaction of the storm-generated wavefield with the ambient swell field...
...the background noise generated by ocean waves, which create a constant barrage of small atmospheric booms called microbaroms.
Infrasound of 0.2 Hz known as microbaroms, generated by interfering ocean waves, propagates into the lower thermosphere where it is dissipated between 110 and 140 km.
Observed arrivals with a low apparent horizontal phase velocity may be refracted in the thermosphere or the stratosphere.... The presence of these tropospheric and stratospheric ducts is dependent on the intensity and direction of the winds, and thus they may be sporadic or seasonal.
Greater resolution than that reproduced here shows that rays with angles of incidence <64° are not reflected below 125 km, at which height dissipation effects strongly attenuate the signal (Donn and Rind).
Microbaroms thus provide a continuously available natural mechanism for probing the upper atmosphere.
It is important to note that isolated travelling ocean waves don't radiate acoustically. Microbarom radiation requires standing wave conditions...[permanent dead link]
The acoustic radiation which results from the motion of the air/water interface is known to be a nonlinear effect.
We show that because of the phase speed mismatch between surface gravity waves and acoustic waves, a single surface wave radiates only evanescent acoustic waves.
Infrasound signals in the microbarom band (about 0.2 Hz) generated by hurricanes often do not appear to originate near the eye where the winds are strongest. This paper suggests that conditions conducive to microbarom (and microseism) generation can occur along the trailing periphery of the storm through the interaction of the storm-generated wavefield with the ambient swell field...
Infrasound of 0.2 Hz known as microbaroms, generated by interfering ocean waves, propagates into the lower thermosphere where it is dissipated between 110 and 140 km.
Observed arrivals with a low apparent horizontal phase velocity may be refracted in the thermosphere or the stratosphere.... The presence of these tropospheric and stratospheric ducts is dependent on the intensity and direction of the winds, and thus they may be sporadic or seasonal.
Greater resolution than that reproduced here shows that rays with angles of incidence <64° are not reflected below 125 km, at which height dissipation effects strongly attenuate the signal (Donn and Rind).
Microbaroms thus provide a continuously available natural mechanism for probing the upper atmosphere.
In this process, the interference of differently directed waves occurs, which forms standing water waves, or the so-called clapotis....To examine andlocate these waves, it is proposed to use their inherent properties to exert ("pump") a varying pressure on the ocean bottom, which generates microseismic vibrations, and to radiate infrasound into the atmosphere.
...the background noise generated by ocean waves, which create a constant barrage of small atmospheric booms called microbaroms.
We show that because of the phase speed mismatch between surface gravity waves and acoustic waves, a single surface wave radiates only evanescent acoustic waves.
Infrasound signals in the microbarom band (about 0.2 Hz) generated by hurricanes often do not appear to originate near the eye where the winds are strongest. This paper suggests that conditions conducive to microbarom (and microseism) generation can occur along the trailing periphery of the storm through the interaction of the storm-generated wavefield with the ambient swell field...
Two well-known American seismologists at the California Institute of Technology at Pasadena, Hugo Benioff and Beno Gutenberg, in 1939 developed both instrumentation and applications for the detection of infrasound. The primitive instrumentation consisted of a wooden box with a low-frequency loudspeaker mounted on top.
Microbaroms are infrasonic waves generated by nonlinear interactions of ocean surface waves traveling in nearly opposite directions with similar frequencies. Such interactions commonly occur between ocean waves with approximately 10-second periods, which are abundant in the open oceans and correspond to the observed 0.2 Hz infrasonic spectral peak.
...the background noise generated by ocean waves, which create a constant barrage of small atmospheric booms called microbaroms.
When we perform a least-squares fit to plane-wave arrivals on the data we find the apparent source azimuth points to the center of the storm low-pressure center.
The Earth's crust can be regarded as a time-invariable medium. By comparing microbaroms and microseisms, this permits a monitoring of acoustic channels to be carried out.
Greater resolution than that reproduced here shows that rays with angles of incidence <64° are not reflected below 125 km, at which height dissipation effects strongly attenuate the signal (Donn and Rind).
