济南市夏季甲醛时空分布特征及对臭氧污染的影响

Temporal and Spatial Distribution Characteristics of Formaldehyde and Its Effect on Ozone Pollution in Jinan in Summer

基于Sentinel-5P卫星遥感数据,分析济南市2019-2021年夏季甲醛浓度的时空分布特征及对臭氧污染的影响。结果表明:研究期间夏季甲醛平均柱浓度呈逐年下降趋势,2020年同比降幅最大为24%;甲醛浓度高值区域主要分布在人口密集的市区及工业聚集的章丘区、济阳区和商河县,呈现由城市中心向外扩散的趋势;甲醛浓度受周边城市的影响,形成一条东西向的区域化污染带;甲醛对臭氧的影响主要表现在臭氧污染轻度或污染初期,而氮氧化物的排放进一步加重臭氧污染。

Based on Sentinel-5P satellite remote sensing data,the spatial and temporal distribution characteristics of formaldehyde concentration in Jinan during the summer of 2019-2021 and its effect on ozone pollution were analyzed.The results showed that the average column concentration of formaldehyde in summer decreased year by year,with the largest year-on-year decrease of 24%in 2020.The areas with high concentration of formaldehyde distributed mainly in densely populated urban areas and Zhangqiu District,Jiyang District and Shanghe County,where the industry was concentrated,showing a trend of spreading outward from the urban center.The concentration of formaldehyde was affected by surrounding cities,forming an east-west regional pollution belt.The effect of formaldehyde on ozone was mainly in the mild or early stage of ozone pollution,and the emission of NO_(x)further aggravated ozone pollution.