2010年浙南地区一次暴雨过程诊断分析

利用常规观测资料、中尺度自动站加密资料、多普勒雷达资料和NCEP1°×1°再兮析资料．对2010年5周8曲日发生在浙南的一次暴雨过程进行了诊断分析，结果发现：此次暴雨是在横槽转竖的大背景下，西风槽和高原槽东移合并加强，并在东移过程中与低层切变共同作用造成的；低空急流的形成在水汽的输送和聚集过程中发挥了重要作用；暴雨过程...

Study of a Heavy Rainfall Process in Southern Zhejiang in 2010

The heavy rainfall which happened in southern Zhejiang on 8--9th May, 2010 was diagnosed and analyzed by using the conventional observation data, mesoscale automatic weather station intensive data, the Doppler radar data and the NCEP 1 °× 1 ° reanalyzed data. The results are as followed. The heavy rainfall was caused of the low-level shear and the combining and strengthening westerly trough and plateau trough of heading eastward under the background of the transversal trough turning upright. The formation of low-level jet has played an important role in water vapor transport. It is found that South China Sea and Bay of Bengal were the headstream of water vapor of the heavy rainfall. The allocation of the lower-level convergence and upper-level divergence was favourable to the heavy rainfall. The/ge front approximation caused instability energy released and further leaded the heavy rainfall happened. The vertical helicity was helpful to forecast the rainstorm area.