Arid
DOI10.1038/nature12278
The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds
Atkinson, James D.; Murray, Benjamin J.; Woodhouse, Matthew T.; Whale, Thomas F.; Baustian, Kelly J.; Carslaw, Kenneth S.; Dobbie, Steven; O’sullivan, Daniel; Malkin, Tamsin L.
通讯作者Murray, Benjamin J.
来源期刊NATURE
ISSN0028-0836
出版年2013
卷号498期号:7454页码:355-358
英文摘要

The amount of ice present in mixed-phase clouds, which contain both supercooled liquid water droplets and ice particles, affects cloud extent, lifetime, particle size and radiative properties(1,2). The freezing of cloud droplets can be catalysed by the presence of aerosol particles known as ice nuclei(2). One of the most important ice nuclei is thought to be mineral dust aerosol from arid regions(2,3). It is generally assumed that clay minerals, which contribute approximately two-thirds of the dust mass, dominate ice nucleation by mineral dust, and many experimental studies have therefore focused on these materials(1,2,4-6). Here we use an established droplet-freezing technique(4,7) to show that feldspar minerals dominate ice nucleation by mineral dusts under mixed-phase cloud conditions, despite feldspar being a minor component of dust emitted from arid regions. We also find that clay minerals are relatively unimportant ice nuclei. Our results from a global aerosol model study suggest that feldspar ice nuclei are globally distributed and that feldspar particles may account for a large proportion of the ice nuclei in Earth’s atmosphere that contribute to freezing at temperatures below about -15 degrees C.


类型Article
语种英语
国家England
收录类别SCI-E
WOS记录号WOS:000320592900038
WOS关键词BIOLOGICAL PARTICLES ; IMMERSION MODE ; AEROSOLS ; CLIMATE ; NUCLEI
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/178989
作者单位Univ Leeds, Sch Earth & Environm, Inst Climate & Atmospher Sci, Leeds LS2 9JT, W Yorkshire, England
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GB/T 7714
Atkinson, James D.,Murray, Benjamin J.,Woodhouse, Matthew T.,et al. The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds[J],2013,498(7454):355-358.
APA Atkinson, James D..,Murray, Benjamin J..,Woodhouse, Matthew T..,Whale, Thomas F..,Baustian, Kelly J..,...&Malkin, Tamsin L..(2013).The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds.NATURE,498(7454),355-358.
MLA Atkinson, James D.,et al."The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds".NATURE 498.7454(2013):355-358.
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