摘要
对2018年西安市春节的污染过程、污染来源、不利气象条件及烟花爆竹对PM2.5的贡献4个方面进行分析。结果显示,在该污染过程的污染快速增长期,PM2.5、PM10、SO2和NO2浓度峰值分别是污染前期浓度的3.56、1.74、2.28和1.81倍;排放源主要为燃放烟花爆竹,对PM2.5的贡献率为50%以上;不利气象条件为小风、静稳、高湿、逆温、边界层低、倒槽等。污染持续期的排放源除了烟花爆竹燃放还有其他污染源;不利气象条件除了均压场外,其它与快速增长期相似。
It was analyzed that the pollution process,pollution sources,unfavorable meteorological conditions and the contribution of fireworks to PM2.5 in the Spring Festival of Xi' an in 2018.The results showed that the peak concentrations of PM2.5,PM10,SO2 and NO2 in rapid growth period were 3.56,1.74,2.28 and 1.81 times of those in the early stage of pollution process,respectively.The main sources of emission were firecrackers discharge,of which the contribution rate to PM2.5 was over 50%.The unfavorable weather conditions mainly included small wind,static stability,high humidity,temperature inversion,low boundary layer,trough etc.Besides firecrackers discharge,there were still other sources of pollution during the pollution period.The adverse weather conditions were similar to those of rapid growth period except for uniform pressure field.
作者
吕婧
李毅辉
曹磊
高飞
陈浩
王琼
LU Jing;LI Yihui;CAO Lei;GAO Fei;CHEN Hao;WANG Qiong(Shaanxi Environmental Monitoring Center,Xi' an 710043,China;Weinan Environmental Monitoring Center,Weinan 714000,China)
出处
《环境保护科学》
CAS
2019年第3期97-101,共5页
Environmental Protection Science
关键词
重污染
污染来源
气象场
烟花爆竹燃放
Heavy Pollution
Pollution Sources
Weather Conditions
Firecrackers Discharge
