摘要
[目的]分析丹东地区一次灾害性暴雨天气过程。[方法]利用实时资料,从环流形势、影响系统、低空急流对暴雨的触发作用以及稳定度和动力条件,对2009年6月9日一次灾害性暴雨天气过程进行初步诊断分析。[结果]蒙古气旋为暴雨的产生提供抬升的动力,江淮切变线将南部水汽源源不断地向北输送,副高西侧有江淮切变线,东侧的西南气流叠加形成的西南急流在丹东南部有水汽通量的幅合,使南来的水汽在丹东南部堆积抬升,水汽凝结潜热释放,加强了中尺度上升运动,致使此次强降水持续时间较长,从而产生暴雨。[结论]该研究为暴雨预报提供一定参考。
[Objective] A disastrous rainstorm process in Dandong region was analyzed.[Method] Based on real time data,the primary diagnosis analysis of a disastrous rainstorm process on June 9th,2009 was carried out from the aspects of circulation pattern,influence system,the trigger action of low-level jet to rainstorm,stability and dynamic condition.[Result] Mongolia cyclone provided uplift power for generating rainstorm,and Changjiang-Huaihe shear line transported water vapor from south to north continually,while the water vapor flux convergence of southwest jet in southern Dandong was formed due to the stacking of southwest airflow in the east of Changjiang-Huaihe shear line in the west of subtropical high,so south water vapor accumulated and uplifted the latent heat release in southern Dandong,and the strong rainfall lasted for a long time due to the strengthening of mesoscale ascending motion,thus leading to rainstorm.[Conclusion] Our study could provide references for rainstorm prediction.
出处
《安徽农业科学》
CAS
北大核心
2011年第11期6556-6557,共2页
Journal of Anhui Agricultural Sciences
关键词
暴雨
低空急流
高空辐散
Rainstorm
Low-level jet
Upper divergence
