气候变化领域集成服务门户(CCPortal): Observing short-timescale cloud development to constrain aerosol-cloud interactions

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DOI	10.5194/acp-22-11727-2022
	Observing short-timescale cloud development to constrain aerosol-cloud interactions
	Gryspeerdt, Edward; Glassmeier, Franziska; Feingold, Graham; Hoffmann, Fabian; Murray-Watson, Rebecca J.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	11727
结束页码	11738
卷号	22 期号:17 页码:12
英文摘要	The aerosol impact on liquid water path (LWP) is a key uncertainty in the overall climate impact of aerosol. However, despite a significant effort in this area, the size of the effect remains poorly constrained, and even the sign is unclear. Recent studies have shown that the relationship between droplet number concentration (N-d) and LWP is an unreliable measure of the impact of N-d variations on LWP due to the difficulty in establishing causality. In this work, we use satellite observations of the short-term development of clouds to examine the role of N-d perturbations in LWP variations. Similar to previous studies, an increase followed by a general decrease in LWP with increasing N-d is observed, suggesting an overall negative LWP response to Nd and a warming LWP adjustment to aerosol. However, the N-d also responds to the local environment, with aerosol production, entrainment from the free troposphere and wet scavenging all acting to modify the N-d. Many of these effects act to further steepen the N-d-LWP relationship and obscure the causal N-d impact on LWP. Using the temporal development of clouds to account for these feedbacks in the N-d-LWP system, a weaker negative N-d-LWP relationship is observed over most of the globe. This relationship is highly sensitive to the initial cloud state, illuminating the roles of different processes in shaping the N-d-LWP relationship. The nature of the current observing system limits this work to a single time period for observations, highlighting the need for more frequent observations of key cloud properties to constrain cloud behaviour at process timescales.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000851504200001
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/273392
作者单位	Imperial College London; Delft University of Technology; National Oceanic Atmospheric Admin (NOAA) - USA; University of Munich
推荐引用方式 GB/T 7714	Gryspeerdt, Edward,Glassmeier, Franziska,Feingold, Graham,et al. Observing short-timescale cloud development to constrain aerosol-cloud interactions[J],2022,22(17):12.
APA	Gryspeerdt, Edward,Glassmeier, Franziska,Feingold, Graham,Hoffmann, Fabian,&Murray-Watson, Rebecca J..(2022).Observing short-timescale cloud development to constrain aerosol-cloud interactions.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(17),12.
MLA	Gryspeerdt, Edward,et al."Observing short-timescale cloud development to constrain aerosol-cloud interactions".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.17(2022):12.