【作者】 孙仲毅； 黄真文； 职青； 任丽伟； 段秀英；

【Author】 Sunzhongyi Huangzhenwen Zhiqing Renliwei Duanxiuying (Hebi City Bureau of Meteorology of Henan Province. Hebi Henan 458030)

【机构】 河南省鹤壁市气象局；

【摘要】 利用常规观测资料和酸雨资料,采用物理量诊断分析方法,对2008年4月11～12日出现在河南省北部的区域性强酸雨天气过程进行了综合分析。结果表明:低槽与切变线共同作用,地面回流形势持续发展,造成这次强酸雨天气;低层辐散结构不利于气溶胶及酸性物质垂直向上扩散;低空下沉气流和风速辐合中心的存在产生致酸污染物的堆积;较小的降水对气溶胶及酸性物质的有效冲刷和稀释作用减小;稳定的大气层结抑制了大气的垂直对流运动;中尺度地形对低层东南气流有明显的阻滞作用。更多还原

【Abstract】 Based on conventional observation data and acid rain data,a regional strong acid rain event occurred in north of Henan Province on 11-12 April 2008 is analyzed comprehensively by physical diagnostic analysis.The results show that the low trough and the shear line interacted with each other,the surface reflux weather situation developed continually,these conditions resulted in the strong acid rain.The divergence structure of at low is not conducive to vertical upward diffusion of aerosol and acid.The downdraft at low and the speed convergence center caused by acid pollutants accumulation.Smaller precipitation reduced effective scouring and dilution of aerosol and acid.Stable atmospheric stratification inhibited vertical convection.Mesoscale topography acted on obviously blocking southeast airflow at low.更多还原