DOI: 10.1002/2015GL063075
论文题名: Crystallization and immersion freezing ability of oxalic and succinic acid in multicomponent aqueous organic aerosol particles
作者: Wagner R. ; Höhler K. ; Möhler O. ; Saathoff H. ; Schnaiter M.
刊名: Geophysical Research Letters
ISSN: 0094-8824
EISSN: 1944-8555
出版年: 2015
卷: 42, 期: 7 起始页码: 2464
结束页码: 2472
语种: 英语
英文关键词: heterogeneous ice nucleation
; oxalic acid
Scopus关键词: Drops
; Emulsification
; Freezing
; Ice
; Nucleation
; Organic acids
; Precipitation (chemical)
; Expansion cooling
; Ice nucleation
; Immersion freezing
; Laboratory datum
; Oxalic acid dihydrate
; Saturation ratio
; Suspended particles
; Temperature range
; Oxalic acid
; aqueous solution
; carboxylic acid
; emulsion
; freezing
; hydration
; ice crystal
; nucleation
英文摘要: This study reports on heterogeneous ice nucleation efficiency of immersed oxalic and succinic acid crystals in the temperature range from 245 to 215 K, as investigated with expansion cooling experiments using suspended particles. In contrast to previous laboratory work with emulsified solution droplets where the precipitation of solid inclusions required a preceding freezing/evaporation cycle, we show that immersed solids readily form by homogeneous crystallization within aqueous solution droplets of multicomponent organic mixtures, which have noneutonic compositions with an excess of oxalic or succinic acid. Whereas succinic acid crystals did not act as heterogeneous ice nuclei, immersion freezing by oxalic acid dihydrate crystals led to a reduction of the ice saturation ratio at freezing onset by 0.066-0.072 compared to homogeneous freezing, which is by a factor of 2 higher than previously reported laboratory data. These observations emphasize the importance of oxalic acid in heterogeneous ice nucleation. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928695582&doi=10.1002%2f2015GL063075&partnerID=40&md5=9d50fdd38333d6761fda8c58bc403443
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8440
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Karlsruhe Institute of Technology, Institute for Meteorology and Climate Research (IMK-AAF), Eggenstein-Leopoldshafen, Germany
Recommended Citation:
Wagner R.,Höhler K.,Möhler O.,et al. Crystallization and immersion freezing ability of oxalic and succinic acid in multicomponent aqueous organic aerosol particles[J]. Geophysical Research Letters,2015-01-01,42(7).