干旱区生态环境知识资源中心(Arid): The relationship between low-level cloud amount and its proxies over the globe by cloud type

Arid

DOI	10.5194/acp-20-3041-2020
	The relationship between low-level cloud amount and its proxies over the globe by cloud type
	Shin, Jihoon; Park, Sungsu
通讯作者	Park, Sungsu
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
EISSN	1680-7324
出版年	2020
卷号	20 期号:5 页码:3041-3060
英文摘要	We extend upon previous work to examine the relationship between low-level cloud amount (LCA) and various proxies for LCA - estimated low-level cloud fraction (ELF), lower tropospheric stability (LTS), and estimated inversion strength (EIS) - by low-level cloud type (CL) over the globe using individual surface and upper-air observations. Individual CL has its own distinct environmental structure, and therefore our extended analysis by CL can provide insights into the strengths and weaknesses of various proxies and help to improve them. Overall, ELF performs better than LTS and EIS in diagnosing the variations in LCA among various CLs, indicating that a previously identified superior performance of ELF compared to LTS and EIS as a global proxy for LCA comes from its realistic correlations with various CLs rather than with a specific CL. However, ELF, LTS, and EIS have a problem in diagnosing the changes in LCA when noCL (no low-level cloud) is reported and also when Cu (cumulus) is reported over deserts where background stratus does not exist. This incorrect diagnosis of noCL as a cloudy condition is more clearly seen in the analysis of individual CL frequencies binned by proxy values. If noCL is excluded, ELF, LTS, and EIS have good inter-CL correlations with the amount when present (AWP) of individual CLs. In the future, an advanced ELF needs to be formulated to deal with the decrease in LCA when the inversion base height is lower than the lifting condensation level to diagnose cumulus updraft fraction, as well as the amount of stratiform clouds and detrained cumulus, and to parameterize the scale height as a function of appropriate environmental variables.
类型	Article
语种	英语
国家	South Korea
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000520408800002
WOS关键词	SURFACE OBSERVATIONS ; BOUNDARY-LAYER ; PART II ; SCHEME ; OCEAN ; COVER ; MODEL
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314135
作者单位	Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea
推荐引用方式 GB/T 7714	Shin, Jihoon,Park, Sungsu. The relationship between low-level cloud amount and its proxies over the globe by cloud type[J],2020,20(5):3041-3060.
APA	Shin, Jihoon,&Park, Sungsu.(2020).The relationship between low-level cloud amount and its proxies over the globe by cloud type.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(5),3041-3060.
MLA	Shin, Jihoon,et al."The relationship between low-level cloud amount and its proxies over the globe by cloud type".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.5(2020):3041-3060.