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[1]施双双*,朱 彬,沈利娟,等.南京北郊低对流层挥发性有机物垂直分布特征及对臭氧生成的潜在影响[J].地球科学与环境学报,2024,46(04):513-527.[doi:10.19814/j.jese.2023.12035]
　SHI Shuang-shuang*,ZHU Bin,SHEN Li-juan,et al.Vertical Distribution Characteristics of Lower Troposphere VOCs and Its Potential Effect on OzoneFormation in the Northern Suburb of Nanjing City, Jiangsu Province, China[J].Journal of Earth Sciences and Environment,2024,46(04):513-527.[doi:10.19814/j.jese.2023.12035]
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南京北郊低对流层挥发性有机物垂直分布特征及对臭氧生成的潜在影响(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第46卷
期数:
2024年第04期
页码:
513-527
栏目:
环境与可持续发展
出版日期:
2024-07-15

文章信息/Info

Title:
Vertical Distribution Characteristics of Lower Troposphere VOCs and Its Potential Effect on OzoneFormation in the Northern Suburb of Nanjing City, Jiangsu Province, China
文章编号:
1672-6561(2024)04-0513-15
作者:
施双双1; 2*; 朱 彬3; 沈利娟1; 2; 杨思琪3; 王红磊3
(1. 无锡学院 中国气象局生态系统碳源汇重点开放实验室,江苏 无锡 214105; 2. 无锡学院 大气与遥感学院,江苏 无锡 214105; 3. 南京信息工程大学 中国气象局气溶胶-云-降水重点开放实验室,江苏 南京 210044)
Author(s):
SHI Shuang-shuang1; 2*;  ZHU Bin3;  SHEN Li-juan1; 2;  YANG Si-qi3;  WANG Hong-lei3
(1. Key Laboratory of Ecosystem Carbon Source and Sink of China Meteorological Administration, Wuxi University,Wuxi 214105, Jiangsu, China; 2. School of Atmosphere and Remote Sensing, Wuxi University,Wuxi 214105, Jiangsu, China; 3. Key Laboratory for Aerosol-cloud-precipitation of ChinaMeteorological Administration, NanjingUniversity of InformationScience & Technology, Nanjing 210044, Jiangsu, China)
关键词:
挥发性有机物;  垂直分布;  臭氧;  对流层;  光化学反应活性;  南京
Keywords:
volatile organic compound;  vertical distribution;  ozone;  troposphere;  photochemical reactionactivity;  Nanjing
分类号:
X51
DOI:
10.19814/j.jese.2023.12035
文献标志码:
A
摘要:
在各地臭氧(O3)污染呈现多发态势的背景下,垂直方向上挥发性有机物(VOCs)对O3生成的潜在贡献尚不明晰。利用南京北郊2020年10月17日至11月15日低对流层(高度为0～1 000 m)强化探空数据,探讨了VOCs垂直分布特征及其对O3生成的潜在影响。结果表明:①VOCs总含量(体积分数,下同)随着高度的升高而降低((73.4±26.1)×10-9～(50.4±20.3)×10-9),各高度上烷烃占比最大(64.3%～71.6%),烯烃占比随着高度的升高而逐渐减小(3.4%～9.9%),芳香烃、卤代烃和乙炔占比无显著变化; 交通排放和低边界层致使早、晚VOCs廓线垂直梯度大,低层VOCs积累且烷烃占比增大,而午后VOCs各组分垂直分布较均匀。②受大气层结影响,白天混合层内以烷烃和烯烃的光化学反应为主,OH自由基损失率(LOH)分别为3.3和2.7 s-1,占比分别为42.8%和35.1%; 稳定边界层和残余层内均以烷烃和芳香烃的光化学反应为主。③午后混合层内VOCs的OH自由基损失率、臭氧生成潜势(OFP)与O3含量成正相关关系,代表局地VOCs和O3关系特征; 早晨稳定边界层和残余层内无显著相关性; 光化学反应活性较大的VOCs组分对O3生成的潜在贡献主要集中在低层,以乙烯和丙烯为主; 低对流层上部对O3光化学生成的潜在贡献主要以低活性的烷烃为主,二甲苯/乙苯比值(X/E)分析表明,高层气团老化程度较高,可反映区域大气特征。限制化工厂排放、提升机动车排放标准和燃油质量是改善南京地区O3污染的关键。
Abstract:
Ozone pollution shows a trend of increasing, but the potential contribution of volatile organic compounds(VOCs)to ozone formation in the vertical direction is still unclear. The vertical distribution characteristics of VOCs and its impact on ozoneformationwere studied based the enhanced sounding data in the lower troposphere(0-1 000 m)from October 17 to November 15, 2020 observed in the northern suburbs of Nanjing city, Jiangsu province.The results show that ① the volume fraction of VOCs((73.4±26.1)×10-9-(50.4±20.3)×10-9)decreases with the increase of height,and alkanes account for the largest proportion(64.3%-71.6%)ateach height,and the proportion ofolefin(3.4%-9.9%)gradually decrease with the increase of height; thereis no significant change in the proportion of aromatics, halohydrocarbons and acetylene; theVOCs accumulate in the lower layer in the morning and evening with a great gradient, and the proportion of alkane increases due to the traffic emissions and lower boundary layer; theVOCs profiles are uniform in the afternoon.② Affected by atmospheric junction, the alkanes andolefindominate the photochemical reactions in the mixing layer, with the loss rate of OH radicals(LOH)of 3.3and 2.7 s-1, accounting for 42.8% and 35.1%, respectively; alkanesand aromatics are the dominant species in the stable boundary layer and residual layer.③ The LOH and ozone formation potential(OFP)of VOCs in the afternoon mixing layer are positively correlated with the ozone volume fraction, which represent the relationship between local VOCs and ozone; however,there is no significant correlation between LOH, OFP and ozone in the stable boundary layer and residual layer in the morning; thecontributions ofVOCs componentswith high reaction activityto OFP are occurred in the low layer, and ethene and propene are the representative components; alkanemakes greater contribution to the photochemical generation of ozone in the upper atmosphere,and the analysis result of X/E ratioreflects higher aging and the characteristics of regional atmospheric. Limiting chemical plant emissions, andimproving vehicle emission standards and fuel quality,are the key to improve ozone pollution in Nanjing.

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备注/Memo

备注/Memo:
收稿日期:2023-12-18; 修回日期:2024-05-04投稿网址:http:∥jese.chd.edu.cn/
基金项目:国家自然科学基金项目(44275115); 无锡学院引进人才科研启动专项经费项目(2023r036)
*通信作者:施双双(1993-),男,江苏启东人,讲师,理学博士,E-mail:sss@cwxu.edu.cn。
通信作者:朱 彬(1969-),男,江苏南京人,教授,博士研究生导师,理学博士,E-mail:binzhu@nuist.edu.cn。
更新日期/Last Update: 2024-08-20