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Infrasonic ray tracing applied to mesoscale atmospheric structures: refraction by hurricanes
Alfred J Bedard1, R Michael Jones
1Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309-0216.
Abstract:
A ray-tracing program is used to estimate the refraction of infrasound by the temperature structure of the atmosphere and by hurricanes represented by a Rankine-combined vortex wind plus a temperature perturbation. Refraction by the hurricane winds is significant, giving rise to regions of focusing, defocusing, and virtual sources. The refraction of infrasound by the temperature anomaly associated with a hurricane is small, probably no larger than that from uncertainties in the wind field. The results are pertinent to interpreting ocean wave generated infrasound in the vicinities of tropical cyclones.
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