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• W1515916142 abstract "Hurricanes, powerful storms with wind speeds that can exceed 80 m/s, are one of themost destructive natural disasters known to man. While current satellite technologyhas made it possible to effectively detect and track hurricanes, expensive 'hurricanehunting'aircraft are required to accurately classify their destructive power. Herewe show that passive undersea acoustic techniques may provide a promising tool foraccurately quantifying the destructive power of a hurricane and so may provide a safeand inexpensive alternative to aircraft-based techniques.It is well known that the crashing of wind-driven waves generates underwaternoise in the 10 Hz to 10 kHz range. Theoretical and empirical evidence are combinedto show that underwater acoustic sensing techniques may be valuable for measuringthe wind speed and determining the destructive power of a hurricane. This is doneby first developing a model for the acoustic intensity and mutual intensity in anocean waveguide due to a hurricane and then determining the relationship betweenlocal wind speed and underwater acoustic intensity. Acoustic measurements of theunderwater noise generated by hurricane Gert are correlated with meteorological datafrom reconnaissance aircraft and satellites to show that underwater noise intensitybetween 10 and 50 Hz is approximately proportional to the cube of the local windspeed. From this it is shown that it should be feasible to accurately measure thelocal wind speed and quantify the destructive power of a hurricane if its eye wallpasses directly over a single underwater acoustic sensor. The potential advantagesand disadvantages of the proposed acoustic method are weighed against those ofcurrently employed techniques.It has also long been known that hurricanes generate microseisms in the 0.1 to0.6 Hz frequency range through the non-linear interaction of ocean surface waves.Here we model microseisms generated by the spatially inhomogeneous waves of ahurricane with the non-linear wave equation where a second-order acoustic field iscreated by first-order ocean surface wave motion. We account for the propagation ofmicroseismic noise through range-dependent waveguide environments from the deepocean to a receiver on land. We compare estimates based on the ocean surface wavefield measured in hurricane Bonnie with seismic measurements from Florida." @default.
• W1515916142 created "2016-06-24" @default.
• W1515916142 creator A5026447357 @default.
• W1515916142 date "2006-01-01" @default.
• W1515916142 modified "2023-09-27" @default.
• W1515916142 title "Quantifying hurricane wind speed with undersea sound" @default.
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