摘要
利用青海省西宁市2018—2019年O_(3)浓度高值时期监测数据,结合CAMx⁃OSAT方法从控制型、分类排放源、区域贡献3个方面定量剖析西宁的O_(3)污染来源.结果表明:西宁O_(3)浓度整体为VOCs控制,主城四区(城东区、城西区、城北区、城中区)尤其突出,且夏季较为显著;2018年和2019年VOC_(s)的贡献占比分别为9.76%和8.91%;而周边区县由NO_(x)和VOC_(s)共同控制.除背景场外,工业源对西宁O_(3)生成的贡献最高,其在2018年和2019年模拟期的贡献占比分别为52.22%和47.24%,其次为交通源.模拟期内,本地源和外地传输的贡献比值约为2∶1,西宁的O_(3)以本地生成为主.本地源中,主城四区是O_(3)生成的主要区域来源,占比约为32.26%;外地传输中,海东是主要贡献区.因此,为降低西宁本地O_(3)污染浓度,应在夏季日间时段控制主城区工业源及交通源的VOC_(s)排放,并加强与海东的联防联控.
The contribution of Xining ozone(O_(3))pollution sources from three aspects,i.e.,O_(3) control types,source categories and source regions,was quantitatively analyzed by using a comprehensive air quality model with extensions and O_(3) source apportionment technology(CAMx⁃OSAT).This model is driven by the monitoring data of high ozone value period in Xining,Qinghai Province from 2018 to 2019.The results indicated that the O_(3) concentration in Xining was mainly controlled by volatile organic compounds(VOC_(s)),especially in the main urban area,and was more significantly in summer.The contribution of VOC_(s) in 2018 and 2019 was 9.76%and 8.91%,respectively.In the surrounding areas,O_(3)was jointly controlled by nitrogen oxide(NO_(x))and VOC_(s).In addition to the background,industrial sources contributed the most to the generation of Xining O_(3),accounting for 52.22% and 47.24% in 2018 and 2019 respectively,followed by transportation sources.During the simulation period,O_(3) in Xining was mainly generated locally,with the contribution ratio of local sources to external transmission to be about 2∶1.The four main urban areas were the main local source regions ofO_(3) generation,accounting for about 32.26%(excluding the background field).On the other hand,Haidong was the main contribution area for external transmission.In summary,controlling the emissions of VOC_(s) from industry and transportation in the main urban area would be effective for reducing O_(3) pollution in Xining during the summer daytime.
作者
刘得守
李景
苏筱倩
左瑞亭
LIU Deshou;LI Jing;SU Xiaoqian;ZUO Ruiting(Xining Ecological Environment Bureau,Xining 810000;Jiangsu Sky-ferry Eco-Environmental Co.Ltd.,Nanjing 210013;Nanjing Star-jelly Environmental Consultants Co.Ltd.,Nanjing 210013)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第2期386-394,共9页
Acta Scientiae Circumstantiae
基金
西宁市网格化决策辅助系统二期拓展项目。
