DOI: 10.1016/j.atmosenv.2017.04.010
Scopus记录号: 2-s2.0-85018460566
论文题名: Modeling of a severe dust event and its impacts on ozone photochemistry over the downstream Nanjing megacity of eastern China
作者: Li M ; , Wang T ; , Han Y ; , Xie M ; , Li S ; , Zhuang B ; , Chen P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 160 起始页码: 107
结束页码: 123
语种: 英语
英文关键词: Dust
; Heterogeneous reaction
; Ozone
; Radiation feedback
Scopus关键词: Aerosols
; Atmospheric chemistry
; Chemical reactions
; Nitric acid
; Ozone
; Photolysis
; Storms
; Surface reactions
; Troposphere
; Weather forecasting
; Heterogeneous chemistry
; Heterogeneous reactions
; OH concentration
; Photochemical activity
; Photolysis rates
; Reactive surfaces
; Tropospheric aerosols
; Weather research and forecasting
; Dust
; ozone
; concentration (composition)
; dust storm
; megacity
; mixing ratio
; ozone
; photochemistry
; photolysis
; radiation budget
; satellite data
; solar radiation
; trace gas
; aerosol
; Article
; boundary layer
; chemical composition
; chemical reaction
; China
; comparative study
; dust
; feedback system
; photochemistry
; photolysis
; priority journal
; refraction index
; solar radiation
; surface property
; urban area
; China
; Jiangsu
; Nanjing [Jiangsu]
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Dust aerosols could affect tropospheric photochemistry by interacting with solar radiation or providing reactive surfaces for heterogeneous reactions. This study examines the effects of a typical springtime dust storm (16–18 March, 2014) on ozone photochemistry over the downstream Nanjing megacity in eastern China. The on-line coupled Weather Research and Forecasting-Chemistry (WRF-Chem) model is used, with the inclusion of eight heterogeneous reactions on dust surfaces. Comparisons with satellite data and visibility record indicate that the model is capable of reproducing the onset time and downstream transport of this dust event. Dust particles act as a sink for all these trace gases examined here. The net decreases of O3, NO2, NO3, N2O5, HNO3, [rad]OH, HO2[rad] and H2O2 in the atmosphere are estimated as −6.1%, −16.0%, −37.4%, −13.9%, −47.7%, −6.0%, −9.2% and −29.7%, of which more than 80% can be explained by heterogeneous chemistry on dust surfaces. The decreases in ground photolysis rate and [rad]OH concentration, along with changes in other weather variables induced by dust aerosols (i.e., radiation and temperature) lead to lower photochemical activity and a small decrease of O3 mixing ratio by roughly 0.5%. This study highlights the importance of dust interaction with ozone photochemistry, and also sets the stage for further investigation of the complicated dust impacts on tropospheric aerosol chemistry. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82426
Appears in Collections: 气候变化事实与影响
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作者单位: School of Atmospheric Sciences, CMA-NJU Joint Laboratory for Climate Prediction Studies, Jiangsu Collaborative Innovation Center for Climate Change, Nanjing University, Nanjing, China
Recommended Citation:
Li M,, Wang T,, Han Y,et al. Modeling of a severe dust event and its impacts on ozone photochemistry over the downstream Nanjing megacity of eastern China[J]. Atmospheric Environment,2017-01-01,160