Using Wavelet Analysis to Detect Tornadoes from Doppler Radar Radial-Velocity Observations

Journal of Atmospheric and Oceanic Technology | March 1, 2007| | Copyright

ABSTRACT

A wavelet-based algorithm is developed to detect tornadoes from Doppler weather radar radial-velocity observations. Within this algorithm, a relative region-to-region velocity difference (RRVD) is defined based on the scale- and location-dependent wavelet coefficients and this difference represents the relative magnitude of the radial velocity shear between two adjacent regions of different scales. The RRVD fields of an idealized tornado and a realistic tornado from a high-resolution numerical simulation are analyzed first. It is found that the value of RRVD in the tornado region is ...

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