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高原气象  2011 

台风莫拉克的偏振参量演变分析

, PP. 809-816

Keywords: 莫拉克台风,偏振参量,粒子分类,融化层

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Abstract:

2009年8月6~10日X波段双线偏振多普勒雷达对200908号台风“莫拉克”(Morakot)进行了观测,根据台风的移动路径和进入雷达观测区域的台风不同部位,分为台风螺旋雨带、台风眼壁和台风后雨带3个部位,针对这3个部位的偏振参量及粒子信息进行了比较分析。结果表明,浅对流普遍存在于台风各个部位;台风各部位均有过冷水和湿雪存在,台风后雨带中还有少量霰粒子和冰雹粒子;且台风融化层特征明显,各部位均存在高ZDR、低ρHV(0)层带和小范围的高KDP层;台风眼区的粒径较其他两个部位粒径偏小;通过偏振参量统计发现ZH、ZDR和ρHV(0)垂直分布特征明显,不同部位差异较大,KDP在不同部位统计特征差异较小。

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