The Possible Mechanism of a Type of Vortex Heavy Rainfall during the Pre-Rainy Season in South China
  • 【摘要】

    In this paper, NCEP reanalysis data, intensive observation data collected from field experiment, model simulation data, and topographic trial data are fully analyzed to study a severe heavy rainfall e... 展开>>In this paper, NCEP reanalysis data, intensive observation data collected from field experiment, model simulation data, and topographic trial data are fully analyzed to study a severe heavy rainfall event during 5-6 June 2008 in South China. Unlike most warm region rainfall cases, this one is associated with an obvious vortex system, which draws in water vapor and energy from the southwest monsoon surges ahead of a low trough above the Bengal Bay (BLT, Bengal Low Trough). At the lower troposphere, three currents, especially the southwest current and the east current, converge into the southeast of the vortex. Thus, the distributions of strong vorticity, water vapor, and ascending motion cause frequently occurrence and growth of convection there. The possible reasons for this rainfall event are summarized as a conceptual model. 收起<<

  • 【作者】

  • 【作者单位】

    State Key Laboratory of Severe Weather/Institute of Atmospheric Physics

  • 【刊期】

    大气和海洋科学快报(英文版) 2011年5期

  • 【关键词】

    中国南方  涡旋系统  可能机制  前汛期  暴雨  田间试验  孟加拉湾  概念模型  mechanism  conceptual model  vortex  heavyrainfall  South China