天津市一次重污染天气过程污染特征分析

Analysis of Pollution Characteristics of a Heavy Air Pollution Process in Tianjin

摘要: 利用天津市环境监测资料及气象观测资料，对2016年12月中旬天津市重污染天气过程污染特征进行分析，结果表明,该次重污染天气过程污染程度重、持续时间长及细颗粒物浓度高，主要是在弱气压场、静风及高湿等不利气象条件下，污染物区域传输及本地污染物排放累积，同时在大气化学反应的作用下，污染物的二次反应共同导致。后向轨迹分析表明，污染气团主要来自西南方向，可能是从河南省中北部地区携带了大量污染物，并且移动速度缓慢，造成天津市较为严重的污染天气。

Abstract: Based on the environmental monitoring data and meteorological data in Tianjin, the pollution characteristics of a heavy air pollution process occurred in mid December 2016 in Tianjin were analyzed; the results show that the heavy pollution process of heavy pollution levels, long duration and high concentration of fine particulate matter, mainly in the weak pressure, static wind and high humidity and other adverse weather conditions by the regional transportation of pollutions and local pollutant emissions, and the action of the two reactions of pollutants in the accumulation of atmospheric chemical reactions caused at the same time. The backward trajectory analysis shows that the pollution air masses mainly come from the southwest direction, it might carry a lot of pollutants from the middle and northern part of Henan province and moves slowly, which causes severe pollution weather in Tianjin.