气候变化领域集成服务门户(CCPortal): Impacts of secondary ice production on Arctic mixed-phase clouds based on ARM observations and CAM6 single-column model simulations

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DOI	10.5194/acp-21-5685-2021
	Impacts of secondary ice production on Arctic mixed-phase clouds based on ARM observations and CAM6 single-column model simulations
	Zhao X.; Liu X.; Phillips V.T.J.; Patade S.
发表日期	2021
ISSN	1680-7316
起始页码	5685
结束页码	5703
卷号	21 期号:7
英文摘要	For decades, measured ice crystal number concentrations have been found to be orders of magnitude higher than measured ice-nucleating particle number concentrations in moderately cold clouds. This observed discrepancy reveals the existence of secondary ice production (SIP) in addition to the primary ice nucleation. However, the importance of SIP relative to primary ice nucleation remains highly unclear. Furthermore, most weather and climate models do not represent SIP processes well, leading to large biases in simulated cloud properties. This study demonstrates a first attempt to represent different SIP mechanisms (frozen raindrop shattering, ice ice collisional breakup, and rime splintering) in a global climate model (GCM). The model is run in the single column mode to facilitate comparisons with the Department of Energy (DOE) s Atmospheric Radiation Measurement (ARM) Mixed-Phase Arctic Cloud Experiment (MPACE) observations. We show the important role of SIP in four types of clouds during M-PACE (i.e., multilayer, single-layer stratus, transition, and frontal clouds), with the maximum enhancement in ice crystal number concentrations up to 4 orders of magnitude in moderately supercooled clouds. We reveal that SIP is the dominant source of ice crystals near the cloud base for the long-lived Arctic single-layer mixed-phase clouds. The model with SIP improves the occurrence and phase partitioning of the mixed-phase clouds, reverses the vertical distribution pattern of ice number concentrations, and provides a better agreement with observations. The findings of this study highlight the importance of considering SIP in GCMs. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	climate modeling; cloud; ice crystal; nucleation; partitioning; solar radiation; vertical distribution
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/246976
作者单位	Department of Atmospheric Sciences, Texas AandM University, College Station, TX 77840, United States; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
推荐引用方式 GB/T 7714	Zhao X.,Liu X.,Phillips V.T.J.,et al. Impacts of secondary ice production on Arctic mixed-phase clouds based on ARM observations and CAM6 single-column model simulations[J],2021,21(7).
APA	Zhao X.,Liu X.,Phillips V.T.J.,&Patade S..(2021).Impacts of secondary ice production on Arctic mixed-phase clouds based on ARM observations and CAM6 single-column model simulations.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7).
MLA	Zhao X.,et al."Impacts of secondary ice production on Arctic mixed-phase clouds based on ARM observations and CAM6 single-column model simulations".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021).