Polluted dust promotes new particle formation and growth

被引：134

作者：

Nie, Wei ^{[1
,2
,3
,8
]}

Ding, Aijun ^{[1
,2
,8
]}

Wang, Tao ^{[3
,4
]}

Kerminen, Veli-Matti ^{[5
]}

George, Christian ^{[6
,7
]}

Xue, Likun ^{[4
]}

Wang, Wenxing ^{[3
]}

Zhang, Qingzhu ^{[3
]}

Petaja, Tuukka ^{[5
]}

Qi, Ximeng ^{[1
,2
,8
]}

Gao, Xiaomei ^{[3
]}

Wang, Xinfeng ^{[3
]}

Yang, Xiuqun ^{[1
,2
,8
]}

Fu, Congbin ^{[1
,2
,8
]}

Kulmala, Markku ^{[2
,5
]}

机构：

[1] Nanjing Univ, Inst Climate & Global Change Res, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Sch Atmospher Sci, Nanjing 210093, Jiangsu, Peoples R China

[3] Shandong Univ, Environm Res Inst, Jinan 250100, Peoples R China

[4] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China

[5] Univ Helsinki, Dept Phys, Div Atmospher Sci, Helsinki, Finland

[6] Univ Lyon 1, F-69626 Lyon, France

[7] IRCELYON, Inst Rech Catalyse & Environm Lyon, CNRS, UMR5256, F-69626 Villeurbanne, France

[8] Collaborat Innovat Ctr Climate Change, Nanjing, Jiangsu, Peoples R China

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

关键词：

MINERAL DUST; SULFURIC-ACID; SAHARAN DUST; ASIAN DUST; AEROSOL; OZONE; NUCLEATION; MODEL; CHEMISTRY; CLIMATE;

D O I：

10.1038/srep06634

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Understanding new particle formation and their subsequent growth in the troposphere has a critical impact on our ability to predict atmospheric composition and global climate change. High pre-existing particle loadings have been thought to suppress the formation of new atmospheric aerosol particles due to high condensation and coagulation sinks. Here, based on field measurements at a mountain site in South China, we report, for the first time, in situ observational evidence on new particle formation and growth in remote ambient atmosphere during heavy dust episodes mixed with anthropogenic pollution. Both the formation and growth rates of particles in the diameter range 15-50 nm were enhanced during the dust episodes, indicating the influence of photo-induced, dust surface-mediated reactions and resulting condensable vapor production. This study provides unique in situ observations of heterogeneous photochemical processes inducing new particle formation and growth in the real atmosphere, and suggests an unexpected impact of mineral dust on climate and atmospheric chemistry.

引用

页数：6

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