0604号强热带风暴“碧利斯”结构特征及其暴雨成因分析  

Study on the characteristics of STS “Bilis” structure and its heavy rainfall in China

作　　者：罗玲 娄小芬 胡亮[2] 何金海[3] 

机构地区：[1]浙江省气象台,杭州310017 [2]中国气象局国家卫星气象中心,北京100081 [3]南京信息工程大学大气科学学院,南京210044

出　　处：《气象科学》2013年第2期208-214,共7页Journal of the Meteorological Sciences

基　　金：浙江省科技厅面上社会发展项目(2008C23014);公益性行业(气象)科研专项(GYHY200906002)

摘　　要：利用NCEP再分析资料、FY2C卫星的OLR及红外云图资料,以及地面台站观测资料,对0604号强热带风暴"碧利斯"的结构特征以及对其登陆后深入内陆造成强降水的成因进行了综合分析,研究结果表明:(1)强热带风暴"碧利斯"结构不对称,南部云系发展旺盛,强降水集中在风暴南侧,呈现明显的不对称分布;(2)副热带高压强度偏强,位置偏西,使得热带风暴登陆后向西偏南方向移动,并在移动过程中与南海季风相互作用,激发了中尺度强降水系统的不断发生;(3)充沛的水汽条件,低层辐合,高层辐散,并伴有深厚的较强上升运动,以及有利的地形都是热带风暴长时间维持并产生大范围强降水的有利条件。By using NECP reanalysis data, OLR and infrared cloud picture data of FY2C, and observations of sufaee stations, the study on the characteristics of the landfall STS ＂Bills＂ and the factors of its heavy rainfall in China has been carried out in the paper. The results show ： （ 1 ） It has an unsymmetrical structure leading to its weak intensity. （2） The position and intensity of the subtropical high have an important effect on the path of ＂Bilis＂ ; at first, ＂Bilis＂ moved toward southwest and then interacted with the China sea monsoon which inspired the occurrence of the mesoscale rainfall system after landfall, at last caused the flooding in China . It is different from the common typhoon rain in rain mechanism. （3） Abundant water vapor transported by the southwest monsoon which benefited the heavy rainfall, the con- vergence in the low-troposphere, the divergence in the high-troposphere, the strong ascending airflow as well as the terrain were all the advantages for the maintaining tropical storm and flooding in China.

关 键 词：强热带风暴(碧利斯) 结构特征 副热带高压 南海夏季风 

分 类 号：P458.121.1[天文地球—大气科学及气象学]