摘要
利用NCEP再分析资料和常规观测资料,对2013年6月24日唐山暴雨进行初步分析。结果表明,受阻高与副高共同作用,低涡在华北北部稳定少动。低层暖切变加强与移动直接导致本次暴雨发生。假相当位温随高度递减,中层有324 K中心。"上干下湿"的不稳定层结为暴雨的发生积聚了能量。散度场低层辐合,高层辐散,对暴雨的维持有利。
By using conventional observation data and NCEP/NCAR FNL data,the rainstorm process occurred on Jul 24,2013 in Tangshan area was analyzed. The results showed that vortex kept stable and little moved with the influence of blocking high and subtropical high in northern North China. The strengthening and moving of warm shear led the storm. Equivalent potential temperature decreased with height and middle-layer had 324 K center.The unstable stratification of ＂upper-dry and lower wet＂ accumulated energy for the occurrence of rainstorm. The lower-layer convergence and the upper-layer divergence made for the maintaining of storm.
出处
《现代农业科技》
2017年第16期184-185,共2页
Modern Agricultural Science and Technology
关键词
夏季暴雨
环流分析
动力条件
河北唐山
summer rainstorm
circulation analysis
dynamic condition
Tangshan Hebei
