河北省廊坊市大气污染扩散气象条件影响分析

The Effects on Meteorological Conditions of Atmospheric Pollution Diffusion in Langfang in Hebei Province

对廊坊市1960—2012年气象资料和2012—2013年廊坊市空气质量监测资料进行了统计分析,结果发现:由于风速偏小,低层逆温日数多,中性及稳定天气偏多等气象条件,加之城镇化的发展使得廊坊市区大气污染扩散气象条件更加不利。雨雪对空气有净化作用,尤其是降雨的净化作用更加明显。风速、风向对空气中不同的污染物影响不同,平均风速大于5 m/s或瞬时风速大于8 m/s是造成廊坊PM10迅速增大的临界指标。针对廊坊城区大气污染的成因进行了分析。

Based on meteorological data from 1960 to 2012 and air quality monitoring data from 2012 to 2013 in Langfang, statistical analysis shows： weather conditions, such as small wind speed, low stratosphere, neutral and stable weather, and the development of urbanization contributed to the pollution in Langfang urban area. Rain and snow are helpful to the air purification, especially the rain. Wind speed, wind direction have different effect on air pollutants. The average wind speed greater than 5 m/s or the instantaneous wind speed greater than 8 m/s is the critical index of Langfang PMIO rapid increase. The causes of the air pollution of Langfang urban district are analyzed.