气候变化领域集成服务门户(CCPortal): A modelling study of the continuous ice formation in an autumnal Arctic mixed-phase cloud case

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DOI	10.1016/j.atmosres.2019.05.021
	A modelling study of the continuous ice formation in an autumnal Arctic mixed-phase cloud case
	Fu S.; Deng X.; Shupe M.D.; Xue H.
发表日期	2019
ISSN	0169-8095
起始页码	77
结束页码	85
卷号	228
英文摘要	An autumnal Arctic mixed-phase cloud case from the Mixed-Phase Arctic Cloud Experiment is simulated with the Weather Research and Forecasting model with a prognostic ice-nucleating particle (INP)formulation to investigate the mechanisms sustaining the continuous ice formation. When the model is run with only primary ice production (PIP)processes, it needs 100 times the observed INP concentration to reproduce the observations. When a secondary ice production (SIP)process, i.e., droplet shattering when supercooled droplets freeze heterogeneously, is added, the model needs 50 times the observed INP concentration to reproduce the observations. Two factors are found to reduce the INP concentration required to reproduce the observations. First, as the cloud moves over the open ocean, the cloud top rises quickly, resulting in a cloud top entrainment rate of ~3.0 cm s−1, which is 4 times as large as that in previous large-eddy simulations of the same case. More INPs can hence be entrained into the cloud. Second, INPs are recycled when ice crystals are completely sublimated below the cloud base. Sensitivity tests show that INP recycling reduces the required INP concentration by a factor of 4. In addition, offline tests show that another two SIP processes, i.e., droplet shattering when supercooled droplets collect small ice crystals and breakup during ice-ice collision, do not substantially contribute to the ice formation in this case. © 2019 The Authors
英文关键词	Arctic mixed-phase cloud; Cloud top entrainment; Ice formation; Ice-nucleating particle recycling; Secondary ice production
语种	英语
scopus关键词	Drop breakup; Large eddy simulation; Recycling; Supercooling; Weather forecasting; Entrainment rates; Ice formations; Ice production; Mixed-phase cloud; Modelling studies; Particle recycling; Supercooled droplets; Weather research and forecasting models; Ice; cloud cover; cloud droplet; entrainment; ice crystal; modeling; nucleation; Arctic
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162064
作者单位	Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China; Cooperative Institute for Research in Environmental Sciences, University of Colorado and NOAA Earth System Research Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Fu S.,Deng X.,Shupe M.D.,et al. A modelling study of the continuous ice formation in an autumnal Arctic mixed-phase cloud case[J],2019,228.
APA	Fu S.,Deng X.,Shupe M.D.,&Xue H..(2019).A modelling study of the continuous ice formation in an autumnal Arctic mixed-phase cloud case.Atmospheric Research,228.
MLA	Fu S.,et al."A modelling study of the continuous ice formation in an autumnal Arctic mixed-phase cloud case".Atmospheric Research 228(2019).