深圳市一次典型污染天气污染特征分析研究——以2016年3月空气质量为例

摘要

A typical regional air pollution episode occurred in Shenzhen and its surrounding areas in March 31,2016, causing the air quality index(AQI) to exceeded 100.The hourly variations of major pollutants and meteorological elements indicated that the case was mainly caused by the regional transportation of pollutants and formation of secondary pollutants under unfavorable meteorological conditions.Furthermore, backward trajectory analysis showed that theair mass arrived at Shenzhen on March 31,2016 may carry lots of pollutants from Dongguan, Guangzhou and Foshan, and it moved slowly, which could be the crucial reason that leaded to the pollution incident, whereas the air mass arrived at Shenzhen before and after the pollution day were both in favor of the dilution and diffusion of pollutants, which leaded to the clear day.%2016年3月31日,深圳市及其周边地区出现典型的区域性空气污染事件,多数地区的AQI超过了100.主要污染物浓度和气象要素的逐小时变化表明,该次污染天气主要是在不利气象条件下,由污染物区域传输和二次污染物生成共同导致的.进一步的后向轨迹分析表明,污染日抵达深圳市的气团可能从东莞、广州和佛山等地区携带了大量污染物,并且移动速度缓慢,造成了深圳较为严重的污染天气,而污染日前和污染日后抵达深圳市的气团有利于污染物的稀释扩散,因此空气质量较好.