DOI: 10.1016/j.atmosenv.2014.10.036
Scopus记录号: 2-s2.0-84908518327
论文题名: Changes in shape and composition of sea-salt particles upon aging in an urban atmosphere
作者: Adachi K ; , Buseck P ; R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 100 起始页码: 1
结束页码: 9
语种: 英语
英文关键词: Aging
; CalNex
; Light scattering
; Los Angeles
; Sea salt
Scopus关键词: Light scattering
; CalNex
; Los angeles
; Sea salts
; Sea-salt particles
; Urban atmospheres
; Aging of materials
; ammonium sulfate
; calcium
; chloride
; magnesium
; mineral
; nitrate
; potassium
; sea water
; sodium
; sulfate
; sulfur
; aerosol composition
; aerosol property
; aging
; light scattering
; sea salt
; shape
; sodium
; urban atmosphere
; aerosol
; air pollution
; Article
; atmosphere
; dipole
; humidity
; laser mass spectrometry
; light scattering
; mass spectrometry
; particle size
; sea salt particle
; sodium bearing aerosol
; transmission electron microscopy
; urban area
; wettability
; X ray fluorescence
; California
; Los Angeles [California]
; United States
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: Sea salt is one of the most abundant types of natural aerosol particles and significantly influences local and global climate. It is an important constituent of samples collected between June 10 and 15 in the Los Angeles area during the 2010 CalNex campaign. The sea-salt particles reacted with other species in the atmosphere and became Na-bearing aerosol (NaA) particles. Using transmission electron microscopy, we found that Na occurred in almost half of all analyzed particles (~3500), although commonly only in minor amounts. Almost all the NaA particles contained S but not Cl, suggesting that Cl was depleted through particle formation to sulfate, nitrate, or both in the urban atmosphere. We observed both rounded and euhedral NaA particles. The rounded ones consisted mainly of aged sea salt (>12h) that had reacted extensively with sulfate, whereas the euhedral ones occurred in samples from relatively fresh marine air. The shapes and compositions of NaA particles changed within 3h in the urban atmosphere. Moreover, our calculations indicate that light scattering from NaA particles depends on their shapes (e.g., roughly spherical, flat, or elongated). These compositions and shapes affect hygroscopicities and light scattering, respectively, both of which influence their climate effects. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82144
Appears in Collections: 气候变化事实与影响
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作者单位: Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki, Japan; School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, United States
Recommended Citation:
Adachi K,, Buseck P,R. Changes in shape and composition of sea-salt particles upon aging in an urban atmosphere[J]. Atmospheric Environment,2015-01-01,100