气候变化领域集成服务门户(CCPortal): Large contribution of organics to condensational growth and formation of cloud condensation nuclei (CCN) in the remote marine boundary layer

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DOI	10.5194/acp-20-12515-2020
	Large contribution of organics to condensational growth and formation of cloud condensation nuclei (CCN) in the remote marine boundary layer
	Zheng G.; Kuang C.; Uin J.; Watson T.; Wang J.
发表日期	2020
ISSN	1680-7316
起始页码	12515
结束页码	12525
卷号	20 期号:21
英文摘要	Marine low clouds strongly influence global climate, and their radiative effects are particularly susceptible to the concentration of cloud condensation nuclei (CCN). One major source of CCN is the condensational growth of pre-CCN particles, and sulfate has long been considered the major condensing species in the remote marine boundary layer. While some studies have suggested that secondary organic species can contribute to particle growth, its importance remains unclear. Here we present the first long-term observational evidence that organics play an important role in particle growth over remote oceans. To the contrary of traditional thinking, sulfate dominated condensational growth for only a small (∼ 18 %) fraction of the 62 observed growth events, even fewer than the organic-dominated events (24 %). During most (58 %) growth events, the major condensing species included both organics and sulfate. Potential precursors of the secondary organics are volatile organic compounds from ocean biological activities and those produced by the air-sea interfacial oxidation. Our results indicate that the condensation of secondary organics contributes strongly to the growth of pre-CCN particles and thereby the CCN population over remote oceans. © Author(s) 2020.
语种	英语
scopus关键词	boundary layer; cloud condensation nucleus; condensation; growth; marine atmosphere; oxidation; volatile organic compound
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/247432
作者单位	Center for Aerosol Science and Engineering, Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO, United States; Environmental and Climate Science Department, Brookhaven National Laboratory, Upton, NY, United States
推荐引用方式 GB/T 7714	Zheng G.,Kuang C.,Uin J.,et al. Large contribution of organics to condensational growth and formation of cloud condensation nuclei (CCN) in the remote marine boundary layer[J],2020,20(21).
APA	Zheng G.,Kuang C.,Uin J.,Watson T.,&Wang J..(2020).Large contribution of organics to condensational growth and formation of cloud condensation nuclei (CCN) in the remote marine boundary layer.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(21).
MLA	Zheng G.,et al."Large contribution of organics to condensational growth and formation of cloud condensation nuclei (CCN) in the remote marine boundary layer".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.21(2020).