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DOI	10.1038/s41561-022-01033-x
	Substantial influence of vapour buoyancy on tropospheric air temperature and subtropical cloud
	Yang, Da; Zhou, Wenyu; Seidel, Seth D.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	781
结束页码	+
卷号	15 期号:10 页码:20
英文摘要	The molar mass of water vapour is less than that of dry air, making humid air lighter than dry air at the same temperature and pressure. This effect is known as vapour buoyancy and has been considered negligibly small in large-scale climate dynamics. Here, we use theory, reanalysis data and a hierarchy of climate models to show that vapour buoyancy has a similar magnitude to thermal buoyancy in the tropical free troposphere. We further show that vapour buoyancy makes cold air rise and increases subtropical stratiform low clouds by up to 70% of its climatological value. However, some widely used climate models fail to represent vapour buoyancy in the governing equations. This flaw leads to inaccurate simulations of cloud distributions-the largest uncertainty in predicting climate change. A combination of theory, reanalysis and model simulations suggests that tropospheric temperature and cloud cover are strongly influenced by vapour buoyancy, an effect currently neglected in some leading global climate models.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000865214900003
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272594
作者单位	University of California System; University of California Davis; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; United States Department of Energy (DOE); Pacific Northwest National Laboratory
推荐引用方式 GB/T 7714	Yang, Da,Zhou, Wenyu,Seidel, Seth D.. Substantial influence of vapour buoyancy on tropospheric air temperature and subtropical cloud[J],2022,15(10):20.
APA	Yang, Da,Zhou, Wenyu,&Seidel, Seth D..(2022).Substantial influence of vapour buoyancy on tropospheric air temperature and subtropical cloud.NATURE GEOSCIENCE,15(10),20.
MLA	Yang, Da,et al."Substantial influence of vapour buoyancy on tropospheric air temperature and subtropical cloud".NATURE GEOSCIENCE 15.10(2022):20.