摘要
为探究人为活动减少条件下对大气污染物的影响,结合3个减少活动时段大气染污物浓度数据、气象数据、超级站数据,综合运用数理统计和相关性分析,得出各阶段的大气污染物的变化情况。结果表明,3个阶段,6项污染物浓度除O_(3)和第三阶段的PM_(2.5) 浓度外,均同比呈下降趋势;第三阶段PM_(2.5)不降反升,一方面与不利的气象条件导致本地污染物累积有关,另一方面从来源解析来看,除扬尘源增加外,主要是二次转化表现突出;3个阶段O_(3)浓度均呈现不降反升的情况,主要因为此阶段天气以晴好为主,高温有利于光化学反应;人为源排放减少,同时氮氧化物排放减少,导致O_(3)无法在夜间进行有效清除,造成O_(3)浓度偏高。
In order to explore the influence of human activities on atmospheric pollutants under the condition of reducing human activities,combined with the data of atmospheric pollutant concentration,meteorological data and superstation data in three periods of reducing activities,the changes of atmospheric pollutants in each stage were obtained by using mathematical statistics and correlation analysis.The results showed that:In three stages,the concentrations of six pollutants,except for O_(3) and PM_(2.5) in the third stage,showed a year-on-year downward trend.In the third stage,PM_(2.5) increased instead of decreasing,on the one hand,it was related to the accumulation of local pollutants caused by adverse meteorological conditions.On the other hand,from the perspective of source analysis,in addition to the increase of dust sources,the secondary transformation is mainly prominent.Ozone in the three stages showed a situation of rising instead of falling,mainly because the weather was mainly sunny,and high temperature was conducive to photochemical reactions.Anthropogenic emissions are reduced,and nitrogen oxide emissions are reduced at the same time.As a result,ozone cannot be effectively removed at night,resulting in high ozone concentration.
作者
张皓
李辉
张留颜
ZHANG Hao;LI Hui;ZHANG Liu-yan(Jiangsu Xuzhou Environmental Monitoring Center,Xuzhou 221000,China)
出处
《环境科技》
2023年第6期53-58,共6页
Environmental Science and Technology
基金
江苏省PM_(2.5)与臭氧污染协同控制重大专项课题
徐州市重点研发计划(社会发展KC20057).
关键词
人为活动
污染物
相关性分析
源解析
Human activities
Pollutants
Correlation analysis
Source analysis
作者简介
张皓(1981-),男,江苏徐州人,本科,工程师,主要从事环境监测与分析工作。
