Analysis of Vortex Wind Fields Retrieval Methods for Single Doppler Weather Radar
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Abstract:
The methods for using single Doppler radar to retrieve the vortex wind fields are rare currently. This article compares three methods: NIVAP, EVAPTC, GBVTD, which can retrieve the vortex wind fields, from the aspects of assumptions, mathematical methods, and the retrieval accuracy, so to identify which is most suitable for the vortex wind field. Using the Rankine mode mesoscale cyclone to simulate the Doppler velocity and wind field with the vortex wind field only, with the environmental wind, and with both environmental wind and convergence (divergence). The similarity coefficients of wind velocity and wind direction between the simulated and the retrieval wind fields are compared. After comparing the simulated wind field, the measured data of Typhoon Rammasun at the time of one hour before landing, right landing and one hour after landing are selected. Then the characteristics of the retrieval wind fields by the three methods are compared and analyzed. The analysis shows that EVAPTC has a good performance, GBVTD has some restrictions in practical application, and NIVAP performs poorly.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.