DOI: 10.1002/2014GL059409
论文题名: Efflorescence upon humidification? X-ray microspectroscopic in situ observation of changes in aerosol microstructure and phase state upon hydration
作者: Pöhlker C. ; Saturno J. ; Krüger M.L. ; Förster J.-D. ; Weigand M. ; Wiedemann K.T. ; Bechtel M. ; Artaxo P. ; Andreae M.O.
刊名: Geophysical Research Letters
ISSN: 0094-10030
EISSN: 1944-9761
出版年: 2014
卷: 41, 期: 10 起始页码: 3681
结束页码: 3689
语种: 英语
英文关键词: aerosol microstructure
; aerosol mixing and phase state
; hydration cycle
; X-ray microspectroscopy
Scopus关键词: Atmospheric aerosols
; Atmospheric humidity
; Drying
; Efflorescence
; Hydration
; Mixing
; Surface chemistry
; X rays
; Aerosol particles
; Ambient aerosols
; Anthropogenic pollution
; In-situ observations
; Particle microstructure
; Phase state
; Sulfate salts
; X-ray microspectroscopy
; Crystal microstructure
; aerosol property
; atmospheric pollution
; humidity
; hydration
; hygroscopicity
; in situ measurement
; rainforest
; recrystallization
; relative humidity
; spectroscopy
; X-ray spectroscopy
; Amazonia
英文摘要: The phase and mixing state of atmospheric aerosols is a central determinant of their properties and thus their role in atmospheric cycling and climate. Particularly, the hygroscopic response of aerosol particles to relative humidity (RH) variation is a key aspect of their atmospheric life cycle and impacts. Here we applied X-ray microspectroscopy under variable RH conditions to internally mixed aerosol particles from the Amazonian rain forest collected during periods with anthropogenic pollution. Upon hydration, we observed substantial and reproducible changes in particle microstructure, which appear as mainly driven by efflorescence and recrystallization of sulfate salts. Multiple solid and liquid phases were found to coexist, especially in intermediate humidity regimes. We show that X-ray microspectroscopy under variable RH is a valuable technique to analyze the hygroscopic response of individual ambient aerosol particles. Our initial results underline that RH changes can trigger strong particle restructuring, in agreement with previous studies on artificial aerosols. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901384266&doi=10.1002%2f2014GL059409&partnerID=40&md5=133347c102d0c4838f61ade7f83c675e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7294
Appears in Collections: 气候减缓与适应
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作者单位: Biogeochemistry and Multiphase Chemistry Departments, Max Planck Institute for Chemistry, Mainz, Germany
Recommended Citation:
Pöhlker C.,Saturno J.,Krüger M.L.,et al. Efflorescence upon humidification? X-ray microspectroscopic in situ observation of changes in aerosol microstructure and phase state upon hydration[J]. Geophysical Research Letters,2014-01-01,41(10).