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Limited production of sulfate and nitrate on front-associateddust storm particles moving from desert to distant populatedareas in northwestern China
Wu,F(Wu,Feng)1; Zhang,DZ(Zhang,Daizhou)2; Cao,JJ(Cao,Junji)1,3; Guo,X(Guo,Xiao)1,4; Xia,Y(Xia,Yao)1,4; Zhang,T(Zhang,Ting)1; Lu,H(Lu,Hui)5; Cheng,Y(Cheng,Yan)3; Wu,Feng
2017-10
发表期刊Atmospheric Chemistry & Physics
卷号17期号:23页码:14473-14484
文章类型期刊论文
摘要Sulfate and nitrate compounds can greatly increase the hygroscopicity of mineral particles in the atmosphere and consequently alter the particles' physical and chemical properties. Their uptake on long-distance-transported Asian dust particles within mainland China has been reported to be substantial in previous studies, but the production was very inefficient in other studies. We compared these two salts in particles collected from a synoptic-scale, mid-latitude, cyclone-induced dust storm plume at the Tengger Desert (38.79° N, 105.38° E) and in particles collected in a postfrontal dust plume at an urban site in Xi'an (34.22° N, 108.87° E) when a front-associated dust storm from the Tengger Desert arrived there approximately 700 km downwind. The results showed that the sulfate concentration was not considerably different at the two sites, while the nitrate concentration was slightly larger at the urban site than that at the desert site. The estimated nitrate production rate was 4–5 ng µg⁻¹ of mineral dust per day, which was much less than that in polluted urban air. The adiabatic process of the dust-loading air was suggested to be the reason for the absence of sulfate formation, and the uptake of background HNO3 was suggested to be the reason for the small nitrate production. According to our investigation of the published literature, the significant sulfate and nitrate in dust-storm-associated samples within the continental atmosphere reported in previous studies cannot be confirmed as actually produced on desert dust particles; the contribution from locally emitted and urban mineral particles or from soil-derived sulfate was likely substantial because the weather conditions in those studies indicated that the collection of the samples was started before dust arrival, or the air from which the samples were collected was a mixture of desert dust and locally emitted mineral particles. These results suggest that the production of nitrate and sulfate on dust particles following cold fronts is likely limited when the particles move from the desert to populated areas within the continent. For an accurate quantification of sulfate and nitrate formed on long-distance-transported desert dust particles at downwind populated areas in eastern China, dust collection efforts are indispensable to minimize any possible influence by locally emitted particles or at least to ensure that the samples are collected after dust arrival.
DOI10.5194/acp-17-14473-2017
收录类别SCI
所属项目编号XDB05000000 ; 40872211 ; 16H02942
语种英语
项目资助者“StrategicPriority Research Program” of the Chinese Academy of Sciences ; “StrategicPriority Research Program” of the Chinese Academy of Sciences ; NNSF of China ; NNSF of China ; Grant-in-Aid forScientific Research (B) of JSPS ; Grant-in-Aid forScientific Research (B) of JSPS
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5605
专题粉尘与环境研究室
通讯作者Wu,Feng
作者单位1.Key Laboratory of Aerosol Chemistry & Physics and State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment, Chinese Academy of Science, Xi’an, China
2.Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto, Japan
3.Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an, China
4.School of Tropical Eco-Environment Protection, Hainan Tropical Marine University, Sanya, China
5.Institute of Desert Meteorology, China Meteorological Administration, Urumqi, China
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Wu,F,Zhang,DZ,Cao,JJ,et al. Limited production of sulfate and nitrate on front-associateddust storm particles moving from desert to distant populatedareas in northwestern China[J]. Atmospheric Chemistry & Physics,2017,17(23):14473-14484.
APA Wu,F.,Zhang,DZ.,Cao,JJ.,Guo,X.,Xia,Y.,...&Wu,Feng.(2017).Limited production of sulfate and nitrate on front-associateddust storm particles moving from desert to distant populatedareas in northwestern China.Atmospheric Chemistry & Physics,17(23),14473-14484.
MLA Wu,F,et al."Limited production of sulfate and nitrate on front-associateddust storm particles moving from desert to distant populatedareas in northwestern China".Atmospheric Chemistry & Physics 17.23(2017):14473-14484.
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