Polluted dust promotes new particle formation and growth

Wei Nie, Aijun Ding, Tao Wang, Veli Matti Kerminen, Christian George, Likun Xue, Wenxing Wang, Qingzhu Zhang, Tuukka Pet�j�, Ximeng Qi, Xiaomei Gao, Xinfeng Wang, Xiuqun Yang, Congbin Fu, Markku Kulmala

Research output: Journal article publicationJournal articleAcademic researchpeer-review

108 Citations (Scopus)

Abstract

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.
Original languageEnglish
Article number6634
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 16 Oct 2014

ASJC Scopus subject areas

  • General

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