摘要
利用多普勒天气雷达、风廓线雷达和1°×1°的FNL再分析资料对2015年6月12日发生在广东的一次强对流天气过程进行分析。结果表明:该次过程是一次典型的华南前汛期暖区强对流过程,925 h Pa以下边界层西南风场增大引起的辐合抬升作用是该次过程的触发机制。925和850 h Pa的低空急流为对流发展提供了充足的水汽输送和辐合。华南中南部午后地面气温的快速上升为对流的发展提供了非常有利的不稳定条件。
With the data of Doppler radars,wind profilers and 1° × 1° FNL reanalysis,a severe convective weather on June 12,2015 was studied. The result is shown as follows. Being a typical warm-sector convective process in southern China,it was triggered by convergence and uplift caused by an increased southwesterly at the boundary layer below 925 hPa. Low-level jet streams at 925 and 850 hPa provided the convection with sufficient transportation and convergence of water vapor. The rapid increase of surface-layer temperature after midday in the central and southern parts of South China was favorable instability conditions for the development of the convection.
作者
张有洋
谢文锋
陈美玲
ZHANG You-yang;XIE Wen-feng;CHEN Mei-ling(Meteorological Center of Central and Southern China Branch, Civil Aviation Regulator ot China, Guangzhou 510405;Meteorological Bureau of Guangzhou, Guangzhou 510080)
出处
《广东气象》
2018年第3期24-28,共5页
Guangdong Meteorology
关键词
天气学
强对流
低空急流
边界层辐合
热力作用
广东
synoptics
severe convection
low - level jet stream
boundary layer convergence
thermo-dynamic process
Guangdong
