气候变化领域集成服务门户(CCPortal): Ice multiplication from ice-ice collisions in the high Arctic: Sensitivity to ice habit, rimed fraction, ice type and uncertainties in the numerical description of the process

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DOI	10.5194/acp-21-9741-2021
	Ice multiplication from ice-ice collisions in the high Arctic: Sensitivity to ice habit, rimed fraction, ice type and uncertainties in the numerical description of the process
	Sotiropoulou G.; Ickes L.; Nenes A.; Ekman A.M.L.
发表日期	2021
ISSN	1680-7316
起始页码	9741
结束页码	9760
卷号	21 期号:12
英文摘要	Atmospheric models often fail to correctly reproduce the microphysical structure of Arctic mixed-phase clouds and underpredict ice water content even when the simulations are constrained by observed levels of ice nucleating particles. In this study we investigate whether ice multiplication from breakup upon ice-ice collisions, a process missing in most models, can account for the observed cloud ice in a stratocumulus cloud observed during the Arctic Summer Cloud Ocean Study (ASCOS) campaign. Our results indicate that the efficiency of this process in these conditions is weak; increases in fragment generation are compensated for by subsequent enhancement of precipitation and subcloud sublimation. Activation of collisional breakup improves the representation of cloud ice content, but cloud liquid remains overestimated. In most sensitivity simulations, variations in ice habit and prescribed rimed fraction have little effect on the results. A few simulations result in explosive multiplication and cloud dissipation; however, in most setups, the overall multiplication effects become substantially weaker if the precipitation sink is enhanced through cloud-ice-to-snow autoconversion. The largest uncertainty stems from the correction factor for ice enhancement due to sublimation included in the breakup parameterization; excluding this correction results in rapid glaciation, especially in simulations with plates. Our results indicate that the lack of a detailed treatment of ice habit and rimed fraction in most bulk microphysics schemes is not detrimental for the description of the collisional breakup process in the examined conditions as long as cloud-ice-to-snow autoconversion is considered. © 2021 Georgia Sotiropoulou et al.
语种	英语
scopus关键词	computer simulation; ice; numerical model; precipitation assessment; sensitivity analysis; stratocumulus; sublimation; uncertainty analysis; Arctic
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/246778
作者单位	Department of Meteorology, Stockholm University, Bolin Center for Climate Research, Stockholm, Sweden; Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Department of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Sweden; Institute for Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras, Greece
推荐引用方式 GB/T 7714	Sotiropoulou G.,Ickes L.,Nenes A.,et al. Ice multiplication from ice-ice collisions in the high Arctic: Sensitivity to ice habit, rimed fraction, ice type and uncertainties in the numerical description of the process[J],2021,21(12).
APA	Sotiropoulou G.,Ickes L.,Nenes A.,&Ekman A.M.L..(2021).Ice multiplication from ice-ice collisions in the high Arctic: Sensitivity to ice habit, rimed fraction, ice type and uncertainties in the numerical description of the process.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(12).
MLA	Sotiropoulou G.,et al."Ice multiplication from ice-ice collisions in the high Arctic: Sensitivity to ice habit, rimed fraction, ice type and uncertainties in the numerical description of the process".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.12(2021).