海南岛大气污染物扩散特征

DIFFUSION CHARACTERISTICS OF AIR POLLUTANTS IN HAINAN ISLAND

研究热带海岛大气环境污染的特殊性对于发展中的海岛大气环境规划和保护具有重要意义。通过采用统计分析方法、数值模拟和天气学分析方法,对海南省海口市大气污染物PM10的分布特征和大气污染的气象条件进行了研究。结果表明:海口市PM10存在春秋冬高、夏低的季节性差异,并受区域环境的影响较大;外来源输入和大陆冷高压是造成海口市大气污染的主要原因。采用CALPUFF模型模拟不同空间位置污染源对环境影响大小,结果显示不同空间位置的中架源的扩散特征差异较大,海南岛海岸线附近以及18.89°N,19.07°N,19.34°N,19.52°N 4个区域为敏感源区域。

It was important to research the atmospheric pollution feature for the atmospheric environmental planning and protection of developing tropical island region. The statistical methods, numerical simulation, and weather pattern analysis were applied in this study to analyze the distribution of primary pollutants such as PM10 and weather condition in the city of Haikou,Hainan Province. The results showed that there were significant seasonal variations in the air quality with higher concentration in fall, winter and spring, while lower in summer. Also, the causes of air quality characteristics in Haikou were discussed by analyzing the distribution of air pollutant emission sources and local meteorological conditions. It implied that regional pollution and continental anticyclone ridge field were the main reasons leading to the distribution characteristics of air pollution in Haikou. Based on CALLPUFF model,the environmental effects of sources located in different spatial locations were simulated. The results indicated that medium height source had obvious spatial effects,and the sensitive source area of medium height source mainly located at coastline,18. 89 ° N,19. 07 ° N,19. 34 ° N,19. 52 ° N.