【摘要】 首先对影响北京地区大气污染物扩散的地面天气形势进行了分类 ,然后结合1 998～ 2 0 0 0年北京南郊观象台的地面、高空资料 ,重点分析了在各类地面天气形势控制下北京地区局地低空、地面的气象条件特征。发现当低压类地面天气形势控制时 ,容易引起污染物在北京地区的汇聚和累积。比较各类地面天气形势对二氧化硫(SO2 )、二氧化氮 (NO2 )、可吸入颗粒物 (PM10 )、一氧化碳 (CO)浓度的影响 ,说明同一种天气形势对不同污染物的影响程度不同 ,进一步证实了在低压类地面天气形势控制时 ,容易出现重污染更多还原

【Abstract】 The surface synoptic situations which affect the air pollution in Beijing area are classified. Using the data of surface observation and upper air sounding from 1998 to 2000 in the southern suburbs of Beijing, the meteorological features of the surface and lower layer in Beijing area that is controlled by the various surface synoptic situations are analyzed. It is found that air pollutants are easily confluent and accumulated when the weather in Beijing is controlled by the low-pressure type at surface. Comparing the influences of the various surface synoptic situations on sulfur dioxide, nitrogen dioxide, PM 10, carbon monoxide, respectively, it is shown that the influence of the same surface synoptic situation on various air pollutants is different,It further approves that the low-pressure weather would easily cause the severe pollution in Beijing.更多还原