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DOI	10.1029/2020GL089665
	Why Are There More Summer Afternoon Low Clouds Over the Tibetan Plateau Compared to Eastern China?
	Wang Y.; Zeng X.; Xu X.; Welty J.; Lenschow D.H.; Zhou M.; Zhao Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	In this study, we analyze the relationships between summer afternoon low cloud cover and environmental conditions over the Tibetan Plateau (TP). Using in situ measurements, satellite data, and reanalysis, and based on theoretical analysis, we find that there is stronger thermal turbulence, lower temperature, and higher frequency of low cloud formation for the same surface relative humidity over the eastern and central TP compared with eastern China. With the same sensible heat flux, decreased air density enhances buoyancy flux, which increases the planetary boundary layer height and moisture vertical transport. At the same time, with the same near-surface relative humidity, lower temperature over the TP decreases the lifting condensation level, which increases the probability of the air parcel reaching this level. Compared to the low-elevation region in eastern China, these two mechanisms enhance low cloud occurrence in the afternoon over the TP. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Boundary layer flow; Boundary layers; Heat flux; Environmental conditions; Higher frequencies; In-situ measurement; Lifting condensation levels; Lower temperatures; Planetary boundary layers; Thermal turbulence; Vertical transports; Atmospheric thermodynamics; boundary layer; buoyancy forcing; cloud cover; environmental conditions; moisture content; relative humidity; satellite data; summer; turbulence; China; Qinghai-Xizang Plateau
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/169362
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Atmospheric Science and Satellite Remote Sensing Key Lab, Hefei, China; National Center for Atmospheric Research, Boulder, CO, United States; National Marine Environmental Forecasting Center, Beijing, China
推荐引用方式 GB/T 7714	Wang Y.,Zeng X.,Xu X.,et al. Why Are There More Summer Afternoon Low Clouds Over the Tibetan Plateau Compared to Eastern China?[J],2020,47(23).
APA	Wang Y..,Zeng X..,Xu X..,Welty J..,Lenschow D.H..,...&Zhao Y..(2020).Why Are There More Summer Afternoon Low Clouds Over the Tibetan Plateau Compared to Eastern China?.Geophysical Research Letters,47(23).
MLA	Wang Y.,et al."Why Are There More Summer Afternoon Low Clouds Over the Tibetan Plateau Compared to Eastern China?".Geophysical Research Letters 47.23(2020).