气候变化领域集成服务门户(CCPortal): Nonturbulent Liquid-Bearing Polar Clouds: Observed Frequency of Occurrence and Simulated Sensitivity to Gravity Waves

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DOI	10.1029/2020GL087099
	Nonturbulent Liquid-Bearing Polar Clouds: Observed Frequency of Occurrence and Simulated Sensitivity to Gravity Waves
	Silber I.; Fridlind A.M.; Verlinde J.; Russell L.M.; Ackerman A.S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	A common feature of polar liquid-bearing clouds (LBCs) is radiatively driven turbulence, which may variously alter cloud lifecycle via vertical mixing, droplet activation, and subsequent feedbacks. However, polar LBCs are commonly initiated under stable, nonturbulent conditions. Using long-term data from the North Slope of Alaska and McMurdo, Antarctica, we show that nonturbulent conditions prevail in ~25% of detected LBCs, surmised to be preferentially early in their lifecycle. We conclude that nonturbulent LBCs are likely common over the polar regions owing primarily to atmospheric temperature and stability. Such stable environments are known to support gravity wave activity. Using large-eddy simulations, we find that short to intermediate period gravity waves may catalyze turbulence formation when aerosol particles available for activation are sufficiently small. We posit that the frequent occurrence of nonturbulent LBCs over the polar regions has implications for polar aerosol-cloud interactions and their parameterization in large-scale models. © 2020, American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Chemical activation; Gravity waves; Large eddy simulation; Life cycle; Turbulence; Aerosol particles; Aerosol-cloud interaction; Common features; Droplet activation; Intermediate periods; Large-scale models; Liquid bearings; North Slope of Alaska; Atmospheric thermodynamics; aerosol; air temperature; gravity wave; sensitivity analysis; vertical mixing; volcanic cloud; Alaska; Antarctica; East Antarctica; McMurdo Sound; North Slope; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170361
作者单位	Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Scripps Institution of Oceanography, University of California, San Diego, CA, United States
推荐引用方式 GB/T 7714	Silber I.,Fridlind A.M.,Verlinde J.,et al. Nonturbulent Liquid-Bearing Polar Clouds: Observed Frequency of Occurrence and Simulated Sensitivity to Gravity Waves[J],2020,47(10).
APA	Silber I.,Fridlind A.M.,Verlinde J.,Russell L.M.,&Ackerman A.S..(2020).Nonturbulent Liquid-Bearing Polar Clouds: Observed Frequency of Occurrence and Simulated Sensitivity to Gravity Waves.Geophysical Research Letters,47(10).
MLA	Silber I.,et al."Nonturbulent Liquid-Bearing Polar Clouds: Observed Frequency of Occurrence and Simulated Sensitivity to Gravity Waves".Geophysical Research Letters 47.10(2020).