Comparative Study on Doppler Weather Radar Products from Strong Convective Weather

摘要

Using Doppler radar products from three intense convective precipitation events occurring on the night of June 12, early morning and night on July 12, 2006 over the Tianjin area, a comparative study is made, showing that typically, the radial velocity field changes earlier than does the echo-intensity field at the initial and mature stages of precipitation, such that much attention should be paid to the variation in the velocity field in doing nowcasts of rainfall, and the Doppler velocity variation in conjunction with Auto-Nowcaster predictions helps determine the change in radar echo intensity and its movement direction, thereby improving the accuracy of nowcasts of strongly convective precipitation.