Relationship between the Infrasonic Signals from Typhoon and the Barometric Pressure in the Typhoon Eye

Abstract

During the courses of formation and transmission, a typhoon over the West pacific radiates infrasonic waves continuously, with periods 3–5 seconds and intensities 0.01–1.15 Pa.

Based on the analyses of numerous observations over many years, the distribution rules for amplitudes and periods of the infrasonic signals from typhoons and the relationships between the corresponding microbaroms and the barometric pressure in the typhoon centre have been established. Utilizing these relations, one can estimate the intensity of barometric pressure in typhoon centres from the continuously recorded microbaroms. It is also possible to use this efficient, simple and economic means to predict trends, sudden turning and some other anomalous phenomena of typhoon.

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