气候变化领域集成服务门户(CCPortal): Small ice particles at slightly supercooled temperatures in tropical maritime convection

CCPortal

DOI	10.5194/acp-20-3895-2020
	Small ice particles at slightly supercooled temperatures in tropical maritime convection
	Lloyd G.; Choularton T.; Bower K.; Crosier J.; Gallagher M.; Flynn M.; Dorsey J.; Liu D.; W Taylor J.; Schlenczek O.; Fugal J.; Borrmann S.; Cotton R.; Field P.; Blyth A.
发表日期	2020
ISSN	16807316
起始页码	3895
结束页码	3904
卷号	20 期号:6
英文摘要	In this paper we show that the origin of the ice phase in tropical cumulus clouds over the sea may occur by primary ice nucleation of small crystals at temperatures just between 0 and -5 ĝˆC. This was made possible through use of a holographic instrument able to image cloud particles at very high resolution and small size (6 μm). The environment in which the observations were conducted was notable for the presence of desert dust advected over the ocean from the Sahara. However, there is no laboratory evidence to suggest that these dust particles can act as ice nuclei at temperatures warmer than about -10 ĝˆC, the zone in which the first ice was observed in these clouds. The small ice particles were observed to grow rapidly by vapour diffusion, riming, and possibly through collisions with supercooled raindrops, causing these to freeze and potentially shatter. This in turn leads to the further production of secondary ice in these clouds. Hence, although the numbers of primary ice particles are small, they are very effective in initiating the rapid glaciation of the cloud, altering the dynamics and precipitation production processes. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
关键词	cloud microphysics dust ice crystal image resolution marine atmosphere oceanic convection size structure supercooling tropical environment Sahara
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132129
推荐引用方式 GB/T 7714	Lloyd G.,Choularton T.,Bower K.,et al. Small ice particles at slightly supercooled temperatures in tropical maritime convection[J]. Atmospheric Chemistry and Physics,2020,20(6).
APA	Lloyd G..,Choularton T..,Bower K..,Crosier J..,Gallagher M..,...&Blyth A..(2020).Small ice particles at slightly supercooled temperatures in tropical maritime convection.,20(6).
MLA	Lloyd G.,et al."Small ice particles at slightly supercooled temperatures in tropical maritime convection".20.6(2020).