ASSIMILATION METHOD FOR RETRIEVING HORIZONTAL WIND FIELD FROM SINGLE-DOPPLER DATA

Doppler weather radar can provide the wind information such as the radial velocity,and has become one of the most powerful means for studies of severe mesoscale and microscale weather systems.Usually the radar observation provides only plane position indicator(PPI) scanning data and range height indicator(RHI) scanning data.and this makes some retrieval methods using three-dimensional volume scanning data impractical in operation.In order to use these data more efficiently,a plane assimilation retrieval(PAR) method is developed using data assimilation technique on the PPI scanning plane.The PAR method is tested with the observation data of Chinese Academy of Meteorological Sciences(CAMS) Doppler weather radar and the result is encouraging.