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DOI	10.5194/acp-19-5451-2019
	The importance of crystalline phases in ice nucleation by volcanic ash
	Maters, Elena C.1; Dingwell, Donald B.2; Cimarelli, Corrado 2; Mueller, Dirk 2; Whale, Thomas F.1,3; Murray, Benjamin J.1
通讯作者	Maters, Elena C.
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
EISSN	1680-7324
出版年	2019
卷号	19 期号:8 页码:5451-5465
英文摘要	Volcanic ash is known to nucleate ice when immersed in supercooled water droplets. This process may impact the properties and dynamics of the eruption plume and cloud as well as those of meteorological clouds once the ash is dispersed in the atmosphere. However, knowledge of what controls the ice-nucleating activity (INA) of ash remains limited, although it has been suggested that crystalline components in ash may play an important role. Here we adopted a novel approach using nine pairs of tephra and their remelted and quenched glass equivalents to investigate the influence of chemical composition, crystallinity, and mineralogy on ash INA in the immersion mode. For all nine pairs studied, the crystal-bearing tephra nucleated ice at warmer temperatures than the corresponding crystal-free glass, indicating that crystalline phases are key to ash INA. Similar to findings for desert dust from arid and semi-arid regions, the presence of feldspar minerals characterizes the four most ice-active tephra samples, although a high INA is observed even in the absence of alkali feldspar in samples bearing plagioclase feldspar and orthopyroxene. There is evidence of a potential indirect relationship between chemical composition and ash INA, whereby a magma of felsic to intermediate composition may generate ash containing ice-active feldspar or pyroxene minerals. This complex interplay between chemical composition, crystallinity, and mineralogy could help to explain the variability in volcanic ash INA reported in the literature. Overall, by demonstrating the importance of crystalline phases in the INA of ash, our study contributes insights essential for better appraising the role of airborne ash in ice formation. Among these is the inference that glass-dominated ash emitted by the largest explosive volcanic eruptions might be less effective at impacting ice-nucleating particle populations than crystalline ash generated by smaller, more frequent eruptions.
类型	Article
语种	英语
国家	England ; Germany
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000465963400001
WOS关键词	MINERAL DUST ; ACTIVE-SITES ; K-RICH ; FELDSPAR ; PARTICLES ; ERUPTIONS ; WATER ; PARAMETERIZATION ; AGGREGATION ; DEPOSITION
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214471
作者单位	1.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England; 2.Ludwig Maximilians Univ Munchen, Dept Earth & Environm Sci, D-80333 Munich, Germany; 3.Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England
推荐引用方式 GB/T 7714	Maters, Elena C.,Dingwell, Donald B.,Cimarelli, Corrado,et al. The importance of crystalline phases in ice nucleation by volcanic ash[J],2019,19(8):5451-5465.
APA	Maters, Elena C.,Dingwell, Donald B.,Cimarelli, Corrado,Mueller, Dirk,Whale, Thomas F.,&Murray, Benjamin J..(2019).The importance of crystalline phases in ice nucleation by volcanic ash.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(8),5451-5465.
MLA	Maters, Elena C.,et al."The importance of crystalline phases in ice nucleation by volcanic ash".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.8(2019):5451-5465.