气候变化领域集成服务门户(CCPortal): Wintertime In Situ Cloud Microphysical Properties of Mixed-Phase Clouds Over the Southern Ocean

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DOI	10.1029/2021JD034832
	Wintertime In Situ Cloud Microphysical Properties of Mixed-Phase Clouds Over the Southern Ocean
	Huang Y.; Siems S.T.; Manton M.J.
发表日期	2021
ISSN	2169897X
卷号	126 期号:11
英文摘要	In situ observations made over 20 flights during three Austral winters (June to October 2013–2015) were analyzed to characterize the cloud microphysical properties and natural variability of mid-latitude shallow convective clouds over the Southern Ocean (SO), with a focus on pristine conditions and the mixed-phase temperature range (MPTR, 0°C to −31°C). Liquid, mixed-phase, and ice cloud fractions were observed 39%, 44%, and 17% of the time, respectively, under various meteorological settings. Liquid phase clouds were typically characterized by low droplet number concentrations and the common presence of drizzle. Supercooled liquid water was prevalent in the MPTR, while freezing of supercooled raindrops likely formed the primary ice nucleation mechanism in these shallow clouds. Ice particles of various habits were present in the mature/maturing convective cloud cells, suggesting the operation of multiple particle growth regimes. Increased ice particle concentrations (exceeding 100 L−1), well in excess of the expected ice nuclei concentrations, were measured at temperature warmer than approximately −12°C, signaling the operation of secondary ice production mechanisms. However, these cloud segments were spatiotemporally inhomogeneous, suggesting the chaotic and turbulent nature of the secondary ice-forming processes. Accurately representing these processes in global models, while necessary, is likely a challenge. Our analysis also found marked inconsistencies between several satellite-based cloud phase products that have underpinned recent developments of model parameterization frameworks. Understanding and addressing these inconsistencies are critical toward improving the representation of SO clouds and their radiative properties in climate models. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; cloud microphysics; in-situ observations; precipitation; Southern Ocean
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185155
作者单位	School of Geography, Earth and Atmospheric Sciences, The University of Melbourne, Melbourne, VIC, Australia; Australian Research Council (ARC) Centre of Excellence for Climate Extremes (CLEX), Sydney, NSW, Australia; School of Earth, Atmosphere and Environment, Monash University, Melbourne, VIC, Australia
推荐引用方式 GB/T 7714	Huang Y.,Siems S.T.,Manton M.J.. Wintertime In Situ Cloud Microphysical Properties of Mixed-Phase Clouds Over the Southern Ocean[J],2021,126(11).
APA	Huang Y.,Siems S.T.,&Manton M.J..(2021).Wintertime In Situ Cloud Microphysical Properties of Mixed-Phase Clouds Over the Southern Ocean.Journal of Geophysical Research: Atmospheres,126(11).
MLA	Huang Y.,et al."Wintertime In Situ Cloud Microphysical Properties of Mixed-Phase Clouds Over the Southern Ocean".Journal of Geophysical Research: Atmospheres 126.11(2021).