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对流对称不稳定的发展演变和环流特征

程艳红 陆汉城

程艳红, 陆汉城. 对流对称不稳定的发展演变和环流特征[J]. 热带气象学报, 2006, (3): 253-258.
引用本文: 程艳红, 陆汉城. 对流对称不稳定的发展演变和环流特征[J]. 热带气象学报, 2006, (3): 253-258.
CHENG Yan-hong, LU Han-cheng. THE EVOLUTION AND CIRCULATION FEATURE OF CONVECTIVE-SYMMETRIC INSTABILITY[J]. Journal of Tropical Meteorology, 2006, (3): 253-258.
Citation: CHENG Yan-hong, LU Han-cheng. THE EVOLUTION AND CIRCULATION FEATURE OF CONVECTIVE-SYMMETRIC INSTABILITY[J]. Journal of Tropical Meteorology, 2006, (3): 253-258.

对流对称不稳定的发展演变和环流特征

基金项目: 国家自然科学基金项目(项目编号:40175012)

THE EVOLUTION AND CIRCULATION FEATURE OF CONVECTIVE-SYMMETRIC INSTABILITY

  • 摘要: 利用1999年6月一次典型梅雨锋暴雨过程和敏感性试验的数值模拟结果分析了对流对称不稳定的发展演变和环流特征。结果表明:条件对称不稳定是大气稳定状态和条件不稳定状态之间的中间纽带,大气由稳定向不稳定或者由不稳定向稳定的演变均通过条件对称不稳定来实现;对流对称不稳定环流的形成与不稳定层的配置有关,当低层为条件不稳定而高层叠加深厚的条件对称不稳定时,对流对称不稳定环流低层出现垂直上升气流,高层出现范围较广的倾斜上升气流,对称不稳定能量释放产生中尺度云带。当低层和高层出现条件不稳定,中间呈条件对称不稳定或弱稳定度层结时,从低层到高层出现较深厚的垂直上升气流,湿重力不稳定能量的释放导致了云带的形成。

     

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出版历程
  • 收稿日期:  2004-12-29
  • 修回日期:  2005-09-08

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