气候变化领域集成服务门户(CCPortal): Linking large-scale circulation patterns to low-cloud properties

CCPortal

DOI	10.5194/acp-20-7125-2020
	Linking large-scale circulation patterns to low-cloud properties
	Juliano T.W.; Lebo Z.J.
发表日期	2020
ISSN	1680-7316
起始页码	7125
结束页码	7138
卷号	20 期号:12
英文摘要	The North Pacific High (NPH) is a fundamental meteorological feature present during the boreal warm season. Marine boundary layer (MBL) clouds, which are persistent in this oceanic region, are influenced directly by the NPH. In this study, we combine 11 years of reanalysis and an unsupervised machine learning technique to examine the gamut of 850 hPa synoptic-scale circulation patterns. This approach reveals two distinguishable regimes-a dominant NPH setup and a land-falling cyclone-and in between a spectrum of large-scale patterns. We then use satellite retrievals to elucidate for the first time the explicit dependence of MBL cloud properties (namely cloud droplet number concentration, liquid water path, and shortwave cloud radiative effect-CRESW) on 850 hPa circulation patterns over the northeast Pacific Ocean. We find that CRESW spans from-146.8 to-115.5Wm-2, indicating that the range of observed MBL cloud properties must be accounted for in global and regional climate models. Our results demonstrate the value of combining reanalysis and satellite retrievals to help clarify the relationship between synoptic-scale dynamics and cloud physics. © 2020 Author(s).
语种	英语
scopus关键词	atmospheric circulation; boundary layer; cloud cover; cloud microphysics; machine learning; marine atmosphere; tropical cyclone; Pacific Ocean; Pacific Ocean (Northeast)
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/247707
作者单位	Research Applications Laboratory, National Center for Atmospheric Research, Boulder, CO 80301, United States; Department of Atmospheric Science, University of Wyoming, Laramie, WY 82071, United States
推荐引用方式 GB/T 7714	Juliano T.W.,Lebo Z.J.. Linking large-scale circulation patterns to low-cloud properties[J],2020,20(12).
APA	Juliano T.W.,&Lebo Z.J..(2020).Linking large-scale circulation patterns to low-cloud properties.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(12).
MLA	Juliano T.W.,et al."Linking large-scale circulation patterns to low-cloud properties".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.12(2020).