2000～2004年天津市大气污染特征分析

Research on Characteristics of Air Pollution in Tianjin

根据天津市2000～2004年的环境监测资料和同期气象资料,对天津市大气污染物浓度变化的时空变化特征、大气污染与天气条件的关系进行了研究。结果表明:天津市大气污染物具有明显的时空分布规律,时间上表现为冬强夏弱,年际之间SO2和PM10浓度减轻,NO2变化不大。空间上表现为SO2和PM10在中心城区改善明显,NO2浓度在局部地区仍在增加。天气形势、城市热岛、逆温和混合层高度等对污染物浓度影响很大。

Based on the air pollution data provided by the Tianjin Environment Monitoring Station and the conventional meteorological data from 2000 to 2004, the characteristics of air quality and the causes of air pollution in Tianjin are analyzed. The results indicate that the major air pollutants are SO2 and PM10, and there are obvious regularities in temporal and spatial distributions in air pollution in Tianjin： air pollution is severer in winter and milder in summer; SO2 and PM10 improved distinctly in the central urban area of Tianjin; NO2 deteriorated in some areas; and meteorological conditions are important to air pollution.