摘要
介绍新一代天气雷达业务建设软件ROSE系统,并通过ROSE产品结合地面自动气象站资料、高空天气图、探空T-lnp图、雷达组网拼图对沈阳2011年8月21日一次强冰雹过程的发展、演变及结构特征进行了分析和研究。分析表明:此次冰雹过程是在高空槽和风场辐合大尺度天气背景下,对流有效位能CAPE、垂直风切变及雷达回波特征均满足强冰雹发生的条件;通过分析降雹前后多种雷达导出产品提出强冰雹客观临近预报的一些指标。
A severe hail event occurred in the south of Shenyang in 21 August 20011 is studied by using automatic weather station data,weather map,T-lgp map,mosaic and ROSE products,and the evolvement and structure of the severe hail are analyzed in detail.The results demonstrate that the severe hail occurred under the background of an upper-level trough and wind convergence.The characteristics of CAPE,vertical wind shear,and radar echoes all indicate that there were favorable conditions for the occurrence of severe hail.Some indexes are put forward for severe hail nowcasting by means of derived radar products before and after the hail.
出处
《气象科技》
2013年第2期242-249,共8页
Meteorological Science and Technology
