基于GPM卫星降水产品对1808号超强台风“玛利亚”降水结构的分析
投稿时间:2018-11-01  修订日期:2019-06-18  点此下载全文
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方勉 海南省三亚市气象局, 海南 三亚 572000
海南省南海气象防灾减灾重点实验室, 海南 海口 570203 
 
何君涛 海南省三亚市气象局, 海南 三亚 572000 2924933876@qq.com 
符永铭 海南省三亚市气象局, 海南 三亚 572000  
郑鹏斌 海南省气象探测中心, 海南 海口 570203  
王定贵 海南省三亚市气象局, 海南 三亚 572000  
潘正涛 海南省三亚市气象局, 海南 三亚 572000  
基金项目:海南省气象局青年基金资助项目(HNQXQN201805)
中文摘要:利用GPM卫星探测两个时次的资料,以1808号超强台风“玛利亚”为研究对象,分析了台风降水率、降水类型及台风高度水平分布,降水率垂直廓线变化特征,以及降水率三维结构分布特征。得出以下主要结论:两个时刻“玛利亚”均处在超强台风级,A时刻台风眼区为深厚对流区,B时刻眼区对流有所减弱,但是有强螺旋雨带出现。A、B时刻的降水率最大值与风暴顶高度并非一一对应,还与降水云系中微物理过程有关。GMI低频18.7 GHz探测的水粒子含量的大值区与强降水率对应较好,高频183.31±3 GHz探测的冰粒子信号与风暴顶高度分布一致。不同降水率对应的垂直廓线表明,降水率在5 km高度出现急剧变化,这是由于在该高度上雨滴碰并增长或者蒸发减小。从A时刻到B时刻,云墙区大于10 mm·h-1的云墙半径内缩,B时刻眼壁与螺旋雨带之间存在着弱降水区及无降水区。
中文关键词:GPM  超强台风“玛利亚”  降水率  降水类型  三维降水结构
 
The precipitation structure for super typhoon Maria (1808) based on GPM satellite rainfall products
Abstract:The Global Precipitation Mesaurement (GPM) satellite provides the next generation of global satellite precipitation products.We selected the super typhoon "Maria" (201808),which occurred in July 2018,for study in this paper.We analyzed the precipitation rate,the type of precipitation and height of the rain top,variation of the vertical profile of the precipitation rate,and distribution characteristics of the three-dimensional structure of the precipitation rate at two different times.The following main conclusions are drawn:At both times,Maria was in the super typhoon stage,and the eye area of the typhoon was a deep convection area at time A,while at time B the convection in the eye area was weakened,yet a strong spiral rain belt was present.The maximum precipitation rate did not correspond to the height of the storm top at both times A and B,nor did it correspond to the microphysical processes in the precipitation cloud system.The high value region of water particle content detected by a low frequency GMI of 18.7 GHz corresponds closely to the heavy precipitation rate.In addition,the signal of ice particles detected at a high frequency of 183.31±3 GHz was consistent with the distribution of the height of the storm top.The vertical profiles corresponding to different precipitation rates showed that the precipitation rate changed sharply at a 5 km altitude,which was due to either the collision and growth of raindrops or the decrease of evaporation at this altitude.From time A to time B,the radius of cloud wall greater than 10 mm·h-1 decreased significantly.There were weak precipitation areas present,and no precipitation areas were observed between the eye wall and spiral rain belt at time B.
keywords:GPM  super typhoon “Maria”  precipitation rate  precipitation type  3D precipitation structure
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