摘要
通过利用多普勒雷达图、OLR日平均场、环境场和比湿场等资料对7514(ELSIE)、7908(HOPE)、0313(Dujuan)号台风进行对比诊断分析。结果表明3个双重眼壁台风都有规则和紧凑的螺旋云带,外围的云带范围小、副高强盛、登陆前850hPa西南风没加强等等,都是造成台风风大而且影响范围广,降水量偏少的原因;OLR场分布与降水场分布的同时对应关系很好,OLR低中心最终没移至陆上,因此陆上降水偏少;台风OLR低中心移向陆地的地点与强降水中心基本相符;登陆时台风中心比湿值、等值线的梯度越大、移速的越慢,则降水时间越长、雨强越大,降水越集中。
Tropical cyclones 7514 (Elsle), 7908 (Hope), and 0313 (Dujuan) were compared and analyzed with radar, long-wave radiation (OLR), ambient field, specific humidity field data, etc. The results show that the three typhoons with double eye walls have characteristics of regular and tight spiral cloud bands, strong Subtropical High and weak southwesterly at 850 hPa before landing, which resulted in the strong wind and less rainfall with an extensive influencing area. The long-wave radiation and the rain field have close relationship. All the low OLR centers of three typhoons didn't land, resulting in less rainfall on land. The low OLR centers of three typhoons corresponded to strong rain centers basically. The bigger the gradient of the specific humidity field is, the slower the typhoons moves, and the longer and stronger the rainfall.
出处
《气象科技》
2005年第3期209-213,i001,共6页
Meteorological Science and Technology
基金
中国科技部社会公益项目(2001DIA20026)资助
