| “7．1”暴雨过程的诊断分析 |
| |
| 引用本文： | 王芬芬.“7．1”暴雨过程的诊断分析[J].四川气象,2009(2):60-65. |
| |
| 作者姓名： | 王芬芬 |
| |
| 作者单位： | 泸州市气象局; |
| |
| 摘 要： | 本文利用NCEP再分析资料对2008年6月30日－7月1日发生在泸州地区的一次暴雨过程中的动力学因子和热力学因子进行了诊断分析。分析表明，暴雨区位于高空槽前正涡度平流区域，同时高空双急流型及高、低空急流之间的有机结合造成中低层持续的上升运动，为此次暴雨的产生提供了有利的动力学背景；深厚的高温高湿气层和强烈的不稳定提供了有利的热力学条件；副高西侧的西南暖湿气流和槽前偏南气流汇合将南海和西太平洋地区的水汽源源不断地输送到川东地区，为暴雨提供了水汽条件。物理诊断量的计算和分析也验证了泸州地区暴雨预报指标是可靠的。
|
| 关 键 词： | 暴雨 高空双急流 高低空急流耦合 西太平洋副热带高压 偏南暖湿气流 |
Diagnosis of "7.1" Torrential Rain Process |
| |
| WANG Fenfen.Diagnosis of "7.1" Torrential Rain Process[J].Journal of Sichuan Meteorology,2009(2):60-65. |
| |
| Authors: | WANG Fenfen |
| |
| Institution: | Luzhou City Meteorological Bureau;Luzhou;646000 |
| |
| Abstract: | Based on NCEP reanalysis data, the dynamic and thermodynamic factors in a torrential rain process occurred in Lu Zhou City, during Jun. 30 - Jul. 1 2008 are diagnosed. The results show that the torrential rain area is just over the advection area of positive vorticity in front of the upper trough. The existence of couple upper troughs and the configuration of upper and lower trough result in the continuous upward motion, which provide the dynamic environment for this process ; the deep high temperature and humidity air as well as the instability favors the process in thermodynamics; meanwhile, both the stream of moisture on the west side of the Subtropical High and the south - deflected airflow in front of the upper trough transported uninterrupted vapor to the eastern Sichuan. In addition, the calculation and analysis of physical elements also confirm that Lu Zhou Torrential Rain Index is available. |
| |
| Keywords: | torrential rain couple upper trough lower trough coupling Western Pacific Subtropical High south-deflected warm&moist airflow |
| 本文献已被 CNKI 维普 等数据库收录！ |
