A Method Fusing Conventional Wind Field with Cloud Motion Wind and Its Application in Location Forecast of the Severe Convection

摘要

Based on the fast algorithm of meteorological satellite guide wind vector tracing,cloud motion wind vector is calculated. According to the different characteristics of cloud motion wind field and sounding wind field,a method which fuses conventional data with unconventional data based on variation principle is presented. The fundamental is constructing a cost function that makes the value approach conventional data and the gradient approach unconventional data. Using this method,the conventional wind and the cloud motion wind are fused. The fused wind field has high resolution. Its wind direction approaches cloud motion wind which indicates move direction of the synoptic system,and its velocity approaches conventional wind which indicates move velocity of the synoptic system. The wind field data are used for short-time forecast of severe convective weather location,which gets a good result.