| 辽宁一次区域性暴雨过程的诊断分析 |
| |
| 引用本文： | 卢娟.辽宁一次区域性暴雨过程的诊断分析[J].安徽农业科学,2012,40(32):15824-15828,15834. |
| |
| 作者姓名： | 卢娟 |
| |
| 作者单位： | 辽宁省气象局,辽宁沈阳,110000 |
| |
| 摘 要： | 利用辽宁逐日降雨量、常规高空和地面观测资料及卫星云图等资料,对2011年7月29～31日发生在辽宁地区的一次区域性暴雨过程进行诊断分析。结果表明,此次降水过程,降水主要发生在暖区、850 hPa切变附近。低空强烈的水汽辐合,300 hPa高空强盛辐散风场形成强烈的"抽吸作用";副高相对稳定,降水区移动缓慢,造成此次降水强度大,持续时间长,灾害严重。此次过程的水汽来源为南海海面上的热带气旋中的大量水汽沿偏南风输送到河套以东地区的低压中,该低压中水汽沿偏南气流输送到辽宁,辽宁位于水汽输送大值轴上,随着水汽输送大值轴东移,辽宁降水陆续结束。300 hPa流场分布呈分散形状,高层辐散有利于动力抽吸作用增强,使得次级环流加强,有利于低层上升运动的增强和维持。500 hPa高空槽对应的高空槽云系与850 hPa切变线对应的一条由尺度不是很大且较分散的对流云团的结合,在辽宁中部一带激发出强降水云团,导致该地区出现暴雨天气。
|
| 关 键 词： | 暴雨 区域性 诊断分析 辽宁 |
Diagnosis and Analysis of A Regional Rainstorm Process in Liaoning |
| |
| LU Juan.Diagnosis and Analysis of A Regional Rainstorm Process in Liaoning[J].Journal of Anhui Agricultural Sciences,2012,40(32):15824-15828,15834. |
| |
| Authors: | LU Juan |
| |
| Institution: | LU Juan(Liaoning Provincial Meteorological Bureau,Shenyang,Liaoning 110000) |
| |
| Abstract: | By using daily precipitation,conventional aerial and surface observation data,satellite cloud data,a diagnosis analysis was carried out on a regional rainstorm process during July 29-31,2011 occurred in Liaoning.The results showed that: the process of precipitation,rainfall mainly occurs in the warm area,near 850 hPa shear.Low level strong water vapor convergence,the altitude of 300 hPa strong divergent wind form a strong " suction";subtropical high precipitation area of relatively stable,slow moving,causing the precipitation intensity,long duration,disaster.The process of water vapor source for the South China Sea on tropical cyclones in the amount of water vapor along the southerly wind transported to the Hetao areas east of the low voltage,the low pressure vapor along the South airflow transportation to Liaoning,Liaoning is located in the water vapor transport large shaft,with the vapor transport of large value axis eastward,Liaoning precipitation gradually end.300 hPa flow field distribution in disperse shape,high level divergence in favor of power suction effect is enhanced,the secondary circulation enhancing,the low-level upward movement of the enhancement and maintenance.500 hPa trough corresponding to the upper trough and shear line over 850 hPa corresponds to a scale is not large and more dispersive convective cloud cluster binding,in central Liaoning area stimulate strong precipitation cloud,leading to the area of rainstorm weather. |
| |
| Keywords: | Rainstorm Regional Diagnosis analysis Liaoning |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
