Estimate of Eddy Dissipation Rates Using Spectrum Width Observed by Hong Kong TDWR Radar

The relationship between Doppler spectrum width and atmospheric turbulence has been established for decades. Based on it, an algorithm that can estimate Eddy Dissipation Rates (EDR) from measured spectrum width has been developed. In the algorithm wind shear contributions are considered and removed from measured spectrum width in order to accurately estimate pure atmospheric turbulence for aviation applications. Applying the algorithm on the spectrum width data observed by Hong Kong TDWR radar over the airport, we have successfully estimated and categorized EDR in different weather environments such as Typhoon and thunderstorms. The EDRs derived from TDWR measured spectrum width have also been compared with relevant aircraft measured EDRs. The results are discussed and presented in the paper.