Atmospheric Processing at the Sea-Land Interface Over the South China Sea: Secondary Aerosol Formation, Aerosol Acidity, and Role of Sea Salts

doi:10.1029/2021JD036255

	Atmospheric Processing at the Sea-Land Interface Over the South China Sea: Secondary Aerosol Formation, Aerosol Acidity, and Role of Sea Salts
	Wang, Guochen 1; Chen, Jia 1; Xu, Jian 1; Yun, Long 2; Zhang, Mingdi 2; Li, Hao 1; Qin, Xiaofei 1; Deng, Congrui 1; Zheng, Haitao 3; Gui, Huaqiao 3
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2022-03-16
卷号	127
ISSN号	2169-897X
DOI	10.1029/2021JD036255
通讯作者	Huang, Kan(huangkan@fudan.edu.cn)
英文摘要	Sea salts act as an important medium for atmospheric processing. One intensive field campaign in the September-October period of 2019 was conducted at a subtropical coastal site over the South China Sea. Unexpected high concentrations of acidic gaseous precursors were observed, yielding high sulfate in PM2.5. Na+ ranked as the third highest inorganic species, about half of NH4+. Significant cation deficiency was found due to the ammonia-poor environment. Diel patterns of most air pollutants from land breeze were stronger than that from marine breeze and presented pronounced unimodal distributions, which were ascribed to complex chemical processing mixed with regional transport. Thermodynamic equilibrium model (ISORROPIA II) simulation revealed sea salts could be internally mixed with fine particle secondary species and suggested evident multiphase reactions on sea salts. The simulated aerosol pH reached as low as 1.63 +/- 0.50, which was related to high sulfate, insufficient alkaline species, and low aerosol liquid water content. During a continuous sea breeze episode, SO42- was underpredicted by 2.89 +/- 3.85 mu g m(-3) if Na+ was not considered in ISORROPIA simulation. The retrieved Na+-related ion pairs (NaCl, NaHSO4, and Na2SO4) accounted for about one-fourth of the total inorganic aerosols. This study highlighted that intense atmospheric processing on sea salts occurred in fine particles and the mixing state between sea salts and other aerosol species should be considered in aerosol acidity prediction and secondary aerosol formation in coastal regions.
资助项目	National Key RD Plan programs[2018YFC0213105] ; National Natural Science Foundation of China[42175119] ; National Natural Science Foundation of China[91644105] ; Natural Science Foundation of Shanghai[18230722600] ; Natural Science Foundation of Shanghai[19ZR1421100] ; Natural Science Foundation of Shanghai[20ZR1422000] ; China Postdoctoral Science Foundation[2019M651365]
WOS关键词	THERMODYNAMIC-EQUILIBRIUM MODEL ; SOLUBLE INORGANIC-IONS ; FINE-PARTICLE PH ; PARTICULATE MATTER ; CHEMICAL-COMPOSITION ; CHLORIDE DEPLETION ; HAZE FORMATION ; WINTER HAZE ; PM2.5 ; WATER
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000771343200014
资助机构	National Key RD Plan programs ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128227]
专题	中国科学院合肥物质科学研究院
通讯作者	Huang, Kan
作者单位	1.Fudan Univ, Shanghai Key Lab Atmospher Particle Pollut & Prev, Dept Environm Sci & Engn, Shanghai, Peoples R China 2.Shenzhen Environm Monitoring Ctr, Shenzhen, Peoples R China 3.Chinese Acad Sci, Key Lab Environm Opt & Technol, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Hefei, Peoples R China 4.Inst Ecochongming, Shanghai, Peoples R China 5.Fudan Univ, IRDR ICoE Risk Inetrconnect & Governance Weather, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Wang, Guochen,Chen, Jia,Xu, Jian,et al. Atmospheric Processing at the Sea-Land Interface Over the South China Sea: Secondary Aerosol Formation, Aerosol Acidity, and Role of Sea Salts[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2022,127.
APA	Wang, Guochen.,Chen, Jia.,Xu, Jian.,Yun, Long.,Zhang, Mingdi.,...&Huang, Kan.(2022).Atmospheric Processing at the Sea-Land Interface Over the South China Sea: Secondary Aerosol Formation, Aerosol Acidity, and Role of Sea Salts.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,127.
MLA	Wang, Guochen,et al."Atmospheric Processing at the Sea-Land Interface Over the South China Sea: Secondary Aerosol Formation, Aerosol Acidity, and Role of Sea Salts".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 127(2022).