气候变化领域集成服务门户(CCPortal): Sea-spray regulates sulfate cloud droplet activation over oceans

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DOI	10.1038/s41612-020-0116-2
	Sea-spray regulates sulfate cloud droplet activation over oceans
	Fossum K.N.; Ovadnevaite J.; Ceburnis D.; Preißler J.; Snider J.R.; Huang R.-J.; Zuend A.; O’Dowd C.
发表日期	2020
ISSN	23973722
卷号	3 期号:1
英文摘要	Sulfate aerosols are typically the dominant source of cloud condensation nuclei (CCN) over remote oceans and their abundance is thought to be the dominating factor in determining oceanic cloud brightness. Their activation into cloud droplets depends on dynamics (i.e. vertical updrafts) and competition with other potential CCN sources for the condensing water. We present new experimental results from the remote Southern Ocean illustrating that, for a given updraft, the peak supersaturation reached in cloud, and consequently the number of droplets activated on sulfate nuclei, is strongly but inversely proportional to the concentration of sea-salt activated despite a 10-fold lower abundance. Greater sea-spray nuclei availability mostly suppresses sulfate aerosol activation leading to an overall decrease in cloud droplet concentrations; however, for high vertical updrafts and low sulfate aerosol availability, increased sea-spray can augment cloud droplet concentrations. This newly identified effect where sea-salt nuclei indirectly controls sulfate nuclei activation into cloud droplets could potentially lead to changes in the albedo of marine boundary layer clouds by as much as 30%. © 2020, The Author(s).
语种	英语
scopus关键词	aerosol formation; albedo; atmospheric convection; cloud condensation nucleus; cloud droplet; cloud microphysics; concentration (composition); spray; sulfate
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178056
作者单位	School of Physics, Ryan Institute’s Centre for Climate & Air Pollution Studies, and MaREI@Galway, National University of Ireland Galway, University Road, Galway, Ireland; University of Wyoming Department of Atmospheric Science, Laramie, WY, United States; State Key Laboratory of Loess and Quaternary Geology and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, China; Center for Excellence in Quaternary Science and Global Change, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, China; Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, QC, Canada
推荐引用方式 GB/T 7714	Fossum K.N.,Ovadnevaite J.,Ceburnis D.,et al. Sea-spray regulates sulfate cloud droplet activation over oceans[J],2020,3(1).
APA	Fossum K.N..,Ovadnevaite J..,Ceburnis D..,Preißler J..,Snider J.R..,...&O’Dowd C..(2020).Sea-spray regulates sulfate cloud droplet activation over oceans.npj Climate and Atmospheric Science,3(1).
MLA	Fossum K.N.,et al."Sea-spray regulates sulfate cloud droplet activation over oceans".npj Climate and Atmospheric Science 3.1(2020).