中山市空气质量特征与气象影响因子分析

Analysis of Air Quality Characteristics and Its Meteorological Causes in Zhongshan

根据2006-2010年中山市环境监测资料和同期气象资料，对中山市空气质量特征、空气污染与气象条件的关系进行研究。结果表明：中山市近5年来API有下降趋势，冬季空气质量最差，夏季空气质量最好；造成中山市空气污染的主要天气形势为高压脊控制型和高压底部型；从风场角度看，冬季中山市主导风向为偏北风，污染物易从北面的污染源输送到中山市并在本地累积，造成中山市空气质量较差：夏季中山市主导风向为偏南风，上游污染源较少，空气质量较好。

Based on the environmental monitoring data and meteorological data from 2006 to 2010 in Zhongshan, the features of air quality and air pollution meteorology were analyzed. The results showed that there was a downward trend Air pollution index （API） in the past 5 years in Zhongshan, where the worst air quality occurred in winter and the best in summer to the contrary. The controlled type of a-ridge-of-high-pressure and the bottom-type high-pressure are two typical weather forms that cause air pollution in Z＇hongshan. In term of the wind field, mainly controlled by northerly winds in Zhongshan during winter, airborne pollutants are easily transported from northern pollution sources and accumulated in Zhongshan hence the air quality worsens. In contrast, predominated by southerly winds and lack of pollutants in upper areas let the air quality better.