气候变化领域集成服务门户(CCPortal): Formation of ice particles through nucleation in the mesosphere

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DOI	10.5194/acp-22-5639-2022
	Formation of ice particles through nucleation in the mesosphere
	Tanaka, Kyoko K.; Mann, Ingrid; Kimura, Yuki
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	5639
结束页码	5650
卷号	22 期号:8 页码:12
英文摘要	Observations of polar mesospheric clouds have revealed the presence of solid ice particles in the upper mesosphere at high latitudes; however, their formation mechanism remains uncertain. In this study, we investigated the formation process of ice particles through nucleation from small amounts of water vapor at low temperatures. Previous studies that used classical nucleation theory have shown that amorphous solid water particles can nucleate homogeneously at conditions that are present in the mesosphere. However, the rate predictions for water in classical nucleation theory disagree with experimental measurements by several orders of magnitude. We adopted a semi-phenomenological model for the nucleation process, which corrects the evaluation of the molecular cluster formation energy using the second virial coefficient, which agrees with both experiments and molecular dynamics simulations. To calculate the nucleation process, we applied atmospheric conditions for the temperature, pressure, numerical density of dust grains, and cooling rate. The results indicate that homogeneous water nucleation is extremely unlikely to occur in the mesosphere, while heterogeneous nucleation occurs effectively. Dust grains generated by meteor ablation can serve as nuclei for heterogeneous nucleation. We also showed that the ice can form directly in a crystalline state, rather than an amorphous state.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000794360200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273785
作者单位	Tohoku University; UiT The Arctic University of Tromso; Hokkaido University
推荐引用方式 GB/T 7714	Tanaka, Kyoko K.,Mann, Ingrid,Kimura, Yuki. Formation of ice particles through nucleation in the mesosphere[J],2022,22(8):12.
APA	Tanaka, Kyoko K.,Mann, Ingrid,&Kimura, Yuki.(2022).Formation of ice particles through nucleation in the mesosphere.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(8),12.
MLA	Tanaka, Kyoko K.,et al."Formation of ice particles through nucleation in the mesosphere".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.8(2022):12.