DOI: 10.1002/2017JD027864
Scopus记录号: 2-s2.0-85044462697
论文题名: Heterogeneous Ice Nucleation Ability of NaCl and Sea Salt Aerosol Particles at Cirrus Temperatures
作者: Wagner R. ; Kaufmann J. ; Möhler O. ; Saathoff H. ; Schnaiter M. ; Ullrich R. ; Leisner T.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 5 起始页码: 2841
结束页码: 2860
语种: 英语
英文关键词: cirrus clouds
; ice nucleation
; NaCl
; sea salt
Scopus关键词: aerosol
; air temperature
; atmospheric deposition
; cirrus
; heterogeneity
; in situ measurement
; nucleation
; particle size
; sampling
; saturation
; sea salt
; sodium chloride
英文摘要: In situ measurements of the composition of heterogeneous cirrus ice cloud residuals have indicated a substantial contribution of sea salt in sampling regions above the ocean. We have investigated the heterogeneous ice nucleation ability of sodium chloride (NaCl) and sea salt aerosol (SSA) particles at cirrus cloud temperatures between 235 and 200 K in the Aerosol Interaction and Dynamics in the Atmosphere aerosol and cloud chamber. Effloresced NaCl particles were found to act as ice nucleating particles in the deposition nucleation mode at temperatures below about 225 K, with freezing onsets in terms of the ice saturation ratio, Sice, between 1.28 and 1.40. Above 225 K, the crystalline NaCl particles deliquesced and nucleated ice homogeneously. The heterogeneous ice nucleation efficiency was rather similar for the two crystalline forms of NaCl (anhydrous NaCl and NaCl dihydrate). Mixed-phase (solid/liquid) SSA particles were found to act as ice nucleating particles in the immersion freezing mode at temperatures below about 220 K, with freezing onsets in terms of Sice between 1.24 and 1.42. Above 220 K, the SSA particles fully deliquesced and nucleated ice homogeneously. Ice nucleation active surface site densities of the SSA particles were found to be in the range between 1.0 · 1010 and 1.0 · 1011 m−2 at T < 220 K. These values are of the same order of magnitude as ice nucleation active surface site densities recently determined for desert dust, suggesting a potential contribution of SSA particles to low-temperature heterogeneous ice nucleation in the atmosphere. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114274
Appears in Collections: 气候减缓与适应
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作者单位: Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research (IMK-AAF), Eggenstein-Leopoldshafen, Germany
Recommended Citation:
Wagner R.,Kaufmann J.,Möhler O.,et al. Heterogeneous Ice Nucleation Ability of NaCl and Sea Salt Aerosol Particles at Cirrus Temperatures[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(5)