天津市滨海新区雾霾及臭氧对大气污染成因分析

Analysis of Air Pollution Caused by Haze and Ozone in Tianjin Binhai New Area

利用滨海新区地面观测、污染物探测、Micaps资料,分析2015年1月~2019年9月滨海新区空气质量AQI指数大于200的重度污染,研究产生雾霾的气象因素和污染物变化特征。结果表明:大气的纬向性环流加强,地面气压场减弱,逆温层的建立和底层切变线辐合作用使污染物堆积,海陆风的作用使陆地水汽增加,形成持续雾霾,雾霾越大,能见度越低,大气污染就越重;夏季高温、晴朗、小风的条件下,氮氧化物和碳氢化物发生光化学反应使臭氧迅速增加,导致产生空气质量AQI指数大于200的重度污染,污染物越多大气光化学污染就越重。

The ground observation,pollutant detection and Micaps data of Binhai New Area were used to analyze heavy pollution of air quality AQI index greater than 200 from January 2015 to September 2019 in Binhai New Area.The meteorological factors that produce of haze and change characteristic of pollutants were studied.The results show that he zonal circulation of the atmosphere was strengthened,the ground pressure field was weakened,and the establishment of the inversion layer and the underlying shear line convergence made the pollutants accumulate.The effect of sea and land breeze increases the amount of land water vapor,resulting in continuous haze,the greater the haze,the lower the visibility,the heavier the air pollution.Under the conditions of high temperature,sunny and small wind in summer,the photochemical reaction of nitrogen oxides and hydrocarbons caused the ozone to increase rapidly,resulting in heavy pollution with air quality AQI index greater than 200.The more pollutants,the more atmospheric photochemical pollution.