基于TROPOMI数据的淄博市夏季VOCs重点关注区研判

Analysis of focus areas of VOCs in summer based on TROPOMI data in Zibo City

HCHO与NO_(2)柱浓度的比值HCHO/NO_(2)可用于指示近地面O_(3)生成对NO_(X)及VOCs排放的敏感性。基于Sentinel-5P卫星TROPOMI检测器HCHO、NO_(2)反演数据,分析了淄博市2021年夏季HCHO及臭氧前体物(HCHO/NO_(2))污染特征并进行溯源解析。针对VOCs企业的监管,先利用卫星遥感技术获取HCHO浓度较高,且臭氧生成受VOCs控制或VOCs和NO_(X)共同控制的区域,再结合土地利用类型和亚米级高分影像,选定工业企业较多的区域,作为控制夏季O_(3)污染VOCs排放的重点关注区域,可精准支撑臭氧和VOCs污染防治,为地方政府和环保部门提供VOCs排放重点监管对象和区域。

The formaldehyde to nitrogen dioxide ratio,can be used to indicate the sensitivity of near-surface ozone generation to NO_(X) and VOCs emissions.Based on the inversion data of HCHO and NO_(2) from TROPOMI detector of Sentinel-5P satellite,the pollution characteristics of HCHO and ozone precursor(HCHO/NO_(2))in summer 2021 in Zibo city were analyzed and traced to the source.For VOCs the regulation of the enterprise,by using satellite remote sensing technology for HCHO concentration is higher,and ozone generated by VOCs control or VOCs and NO_(X) control area,combining land-use type and high-resolution remote sensing images,selected areas with a high number of industrial enterprises,as a focus on the area of the summer ozone pollution emissions of VOCs control,can support the ozone and VOCs pollution prevention and control,for local governments and environmental protection departments to provide VOCs emissions of focus regulatory objects and regions.