摘要
为研究常州市2022年6月14-21日的臭氧连续超标过程,利用EKMA曲线分析此次污染过程中臭氧生成对其前体物VOCs和NO_(x)的敏感性,通过反距离权重插值算法对网格化数据进行插值对该污染过程进行分析。结果表明:常州市臭氧及其前体物存在明显的日变化特征。6月臭氧超标天的臭氧与温度呈正相关,与相对湿度呈负相关。常州市臭氧处于强VOCs控制区,削减VOCs会使当地臭氧生成潜势逐步降低;不当削减NO_(x)排放反而会使当地臭氧生成潜势上升。6月14-18日,江苏省呈区域型污染,常州市温度偏高有利于臭氧生成;19-20日臭氧污染气团不断向西移动,臭氧高值区处于常州市;21日主导风向转为东南风,常州本地臭氧生成叠加周边区域影响,致使常州市臭氧仍处于高值。
In order to study the continuous process of ozone exceeding the standard in Changzhou from June 14 to 21,2022,empirical kinetics modeling approach(EKMA)was used to analyze the ozone sensitivity to VOCs and NO_(x),and the pollution process was analyzed through the grid data which was interpolated by inverse distance weight(IDW)method.The results show that ozone and its precursors have obvious daily variation characteristics in Changzhou.ozone exceedance days in June was positively correlated with temperature and negatively correlated with relative humidity.The ozone in Changzhou is in a strong VOCs-limited area,and the reduction of VOCs would reduce the ozone formation potential;otherwise,inappropriate reduction of NO_(x) emissions will increase the ozone formation potential.From June 14 to 18,Jiangsu Province showed regional pollution of ozone,and the higher temperature in Changzhou was conducive to ozone generation.From 19th to 20th,the ozone pollution air mass moved westward continuously,and the high value ozone area was located in Changzhou City;On June 21,the dominant wind direction changed to southeast,and the local ozone generation in Changzhou combined with the influence of surrounding areas leading to the high ozone level of Changzhou.
作者
陆维青
艾洁
周安琪
钱洪
钟声
王爱平
LU Wei-qing;AI Jie;ZHOU An-qi;QIAN Hong;ZHONG Sheng;WANG Ai-ping(Jiangsu Environmental Monitoring Centre,Nanjing 210019,China;Beijing Insights Value Technology Co.,Ltd.,Beijing 100000,China)
出处
《环境生态学》
2023年第4期79-87,共9页
Environmental Ecology
基金
国家自然科学基金(D0506-41975154):基于多种观测技术交叉观测探明大气活性氮氧化物污染特征及转化途径的研究资助。
关键词
EKMA曲线
反距离权重插值算法
臭氧生成机制
Empirical kinetics modeling approach
inverse distance weight
ozone generation mechanism
