气候变化领域集成服务门户(CCPortal): Comprehensive quantification of height dependence of entrainment mixing between stratiform cloud top and environment

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DOI	10.5194/acp-21-11225-2021
	Comprehensive quantification of height dependence of entrainment mixing between stratiform cloud top and environment
	Gao S.; Lu C.; Liu Y.; Yum S.S.; Zhu J.; Zhu L.; Desai N.; Ma Y.; Wu S.
发表日期	2021
ISSN	1680-7316
起始页码	11225
结束页码	11241
卷号	21 期号:14
英文摘要	Different entrainment-mixing processes of turbulence are crucial to processes related to clouds; however, only a few qualitative studies have been concentrated on the vertical distributions of entrainment-mixing mechanisms with low vertical resolutions. To quantitatively study vertical profiles of entrainment-mixing mechanisms with a high resolution, the stratiform clouds observed in the Physics of Stratocumulus Top (POST) project are examined. The unique sawtooth flight pattern allows for an examination of the vertical distributions of entrainment-mixing mechanisms with a 5ĝ€¯m vertical resolution. Relative standard deviation of volume mean radius divided by relative standard deviation of liquid water content is introduced to be a new estimation of microphysical homogeneous mixing degree, to overcome difficulties of determining the adiabatic microphysical properties required in existing measures. The vertical profile of this new measure indicates that entrainment-mixing mechanisms become more homogeneous with decreasing altitudes and are consistent with the dynamical measures of Damköhler number and transition scale number. Further analysis shows that the vertical variation of entrainment-mixing mechanisms with decreasing altitudes is due to the increases of turbulent dissipation rate in cloud and relative humidity in droplet-free air and the decrease of size of droplet-free air. The results offer insights into the theoretical understanding and parameterizations of vertical variation of entrainment-mixing mechanisms. © Copyright:
语种	英语
scopus关键词	cloud droplet; cloud microphysics; entrainment; mixing; relative humidity; stratiform cloud; 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/246702
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, China; Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, United States; Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea; Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, China; Department of Meteorology and Climate Science, San Jose State University, San Jose, CA, United States
推荐引用方式 GB/T 7714	Gao S.,Lu C.,Liu Y.,et al. Comprehensive quantification of height dependence of entrainment mixing between stratiform cloud top and environment[J],2021,21(14).
APA	Gao S..,Lu C..,Liu Y..,Yum S.S..,Zhu J..,...&Wu S..(2021).Comprehensive quantification of height dependence of entrainment mixing between stratiform cloud top and environment.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(14).
MLA	Gao S.,et al."Comprehensive quantification of height dependence of entrainment mixing between stratiform cloud top and environment".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.14(2021).