福州大气污染日与气象条件关系

利用2008-2012年福州市大气污染逐日监测资料确定福州市大气污染日,并分析了其天气形势、地面气象资料及高空探测资料。结果表明,易产生大气污染日的气象特征包括:500 hPa高度场关键区被弱暖平流控制或冷空气势力较弱;850 hPa高度场关键区等高线稀疏,没有明显的天气系统;850 hPa以下大气一般存在逆温层、湿层与风向突变层,大气水平、垂直交流不畅,属静稳大气,易造成大气污染物堆积。大气污染日出现频率较高的海平面气压场类型有:大陆高压脊型、变性冷高压前部型、变性冷高压底部型或后部型、锋前暖区型、均压场型、地面倒槽暖区型。

Weather conditions of Fuzhou atmospheric pollution dates

Based on 2008- 2012 Fuzhou daily air pollution monitoring data,air pollution days in Fuzhou were determined,and the weather situation,meteorological data,and upper air sounding data on the air pollution days were analyzed. It has been discovered that meteorological characteristics come easy to produce air pollution days are as follows： 500 hPa height field key areas controlled by weak warm advection or the cold air forces being weak; sparse contours of 850 hPa height field key areas without significant weather system; in the atmosphere less than 850 hPa there are generally inversion layer,wet layer and wind mutation layer,and horizontal,vertical miscommunication belonging to atmospheric static stability,easy to cause accumulation of atmospheric pollutants.Types of sea-level pressure frequent to bring about air pollution days are as follows： continental high pressure ridge,degenerated frontof cold high-pressure,degenerated bottom or rear of cold high-pressure,prefrontal warm area,equalizing field,ground trough warm zone.