RETRIEVAL OF HORIZONTAL WIND AND QUALITY CONTROLLING OF SINGLE DOPPLER RADAR DATA ON LANDING TYPHOON

The preconditions to make best use of the Doppler radar data includes the noise removing,velocity ambiguity distinguishing,horizontal wind field retrieving and exactness verifying.The noise removing and velocity ambiguity distinguishing was made in this work for the Doppler radar data collected during August 2005 on landing typhoon Matasa(0509) in Yantai city,Shangdong Province,and the verified result showed that the quality control for this dataset was correct.After the horizontal wind field was retrieved,the synoptic analysis were done,including the characteristics of the radar radial velocity,the characteristics of the large-scale wind field,compartment with the satellite images and the vertical cross of the velocity.The analysis results show that the meso/small-scales systems in the landing typhoon and its horizontal/vertical structure could be clearly retrieved using the dataset collected by single Doppler radar,and a shear or a convergence was corresponding with the sever storm band around the tropical cyclone.At the same time,the retrieved wind field from single Doppler radar was proved to be a reliable and high-resolution dataset to analysis the inner meso-scale structure of the landing typhoon.It was also proved that the method for removing the velocity alias could be an effective approach to the preliminary quality control of the Doppler radar data,and the VAP method could also be a reasonable solution for analysis of meso-scale wind field.