气候变化领域集成服务门户(CCPortal): Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment

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DOI	10.5194/acp-21-4079-2021
	Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment
	Maillard J.; Ravetta F.; Raut J.-C.; Mariage V.; Pelon J.
发表日期	2021
ISSN	1680-7316
起始页码	4079
结束页码	4101
卷号	21 期号:5
英文摘要	The Ice, Atmosphere, Arctic Ocean Observing System (IAOOS) field experiment took place from 2014 to 2019. Over this period, more than 20 instrumented buoys were deployed at the North Pole. Once locked into the ice, the buoys drifted for periods of a month to more than a year. Some of these buoys were equipped with 808 nm wavelength lidars which acquired a total of 1777 profiles over the course of the campaign. This IAOOS lidar dataset is exploited to establish a novel statistic of cloud cover and of the geometrical and optical characteristics of the lowest cloud layer. The average cloud frequency from April to December over the course of the campaign was 75 %. Cloud occurrence frequencies were above 85% from May to October. Single layers are thickest in October/November and thinnest in the summer. Meanwhile, their optical depth is maximum in October. On the whole, the cloud base height is very low, with the great majority of first layer bases beneath 120 m. In April and October, surface temperatures are markedly warmer when the IAOOS profile contains at least one low cloud than when it does not. This temperature difference is statistically insignificant in the summer months. Indeed, summer clouds have a shortwave cooling effect which can reach -60 W m-2 and balance out their longwave warming effect. © 2021 Author(s).
语种	英语
scopus关键词	arctic environment; cloud cover; cloud microphysics; cloud radiative forcing; experimental study; longwave radiation; optical depth; optical property; shortwave radiation; wavelength
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/247054
作者单位	LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS, Paris, France
推荐引用方式 GB/T 7714	Maillard J.,Ravetta F.,Raut J.-C.,et al. Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment[J],2021,21(5).
APA	Maillard J.,Ravetta F.,Raut J.-C.,Mariage V.,&Pelon J..(2021).Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(5).
MLA	Maillard J.,et al."Characterisation and surface radiative impact of Arctic low clouds from the IAOOS field experiment".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.5(2021).