气候变化领域集成服务门户(CCPortal): Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles

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DOI	10.1029/2020JD033073
	Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles
	Cornwell G.C.; Sultana C.M.; Prank M.; Cochran R.E.; Hill T.C.J.; Schill G.P.; DeMott P.J.; Mahowald N.; Prather K.A.
发表日期	2020
ISSN	2169897X
卷号	125 期号:24
英文摘要	Oceans are, generally, relatively weak sources of ice nucleating particles (INPs). Thus, dust transported from terrestrial regions can dominate atmospheric INP concentrations even in remote marine regions. Studies of ocean-emitted INPs have focused upon sea spray aerosols containing biogenic species. Even though large concentrations of dust are transported over marine regions, resuspended dust has never been explicitly considered as another possible source of ocean-emitted INPs. Current models assume that deposited dust is not re-emitted from surface waters. Our laboratory studies of aerosol particles produced from coastal seawater and synthetic seawater doped with dust show that dust can indeed be ejected from water during bubble bursting. INP concentration measurements show these ejected dust particles retain ice nucleating activity. Doping synthetic seawater to simulate a strong dust deposition event produced INPs active at temperatures colder than −13°C and INP concentrations 1 to 2 orders of magnitude greater than either lab sea spray or marine boundary layer measurements. The relevance of these laboratory findings is highlighted by single-particle composition measurements along the Californian coast where at least 9% of dust particles were mixed with sea salt. Additionally, global modeling studies show that resuspension of dust from the ocean could exert the most impact over the Southern Ocean, where ocean-emitted INPs are thought to dominate atmospheric INP populations. More work characterizing the factors governing the resuspension of dust particles is required to understand the potential impact upon clouds. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol; dust; ice nucleating particles; marine
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185575
作者单位	Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, United States; Now at Pacific Northwest National Laboratory, Richland, WA, United States; Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Cornwell G.C.,Sultana C.M.,Prank M.,et al. Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles[J],2020,125(24).
APA	Cornwell G.C..,Sultana C.M..,Prank M..,Cochran R.E..,Hill T.C.J..,...&Prather K.A..(2020).Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles.Journal of Geophysical Research: Atmospheres,125(24).
MLA	Cornwell G.C.,et al."Ejection of Dust From the Ocean as a Potential Source of Marine Ice Nucleating Particles".Journal of Geophysical Research: Atmospheres 125.24(2020).