气候变化领域集成服务门户(CCPortal): Revisiting properties and concentrations of ice-nucleating particles in the sea surface microlayer and bulk seawater in the Canadian Arctic during summer

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DOI	10.5194/acp-19-7775-2019
	Revisiting properties and concentrations of ice-nucleating particles in the sea surface microlayer and bulk seawater in the Canadian Arctic during summer
	Irish V.E.; Hanna S.J.; Xi Y.; Boyer M.; Polishchuk E.; Ahmed M.; Chen J.; Abbatt J.P.D.; Gosselin M.; Chang R.; Miller L.A.; Bertram A.K.
发表日期	2019
ISSN	16807316
起始页码	7775
结束页码	7787
卷号	19 期号:11
英文摘要	Despite growing evidence that the ocean is an important source of ice-nucleating particles (INPs) in the atmosphere, our understanding of the properties and concentrations of INPs in ocean surface waters remains limited. We have investigated INPs in sea surface microlayer and bulk seawater samples collected in the Canadian Arctic during the summer of 2016. Consistent with our 2014 studies, we observed that INPs were ubiquitous in the microlayer and bulk seawaters; heat and filtration treatments reduced INP activity, indicating that the INPs were likely heat-labile biological materials between 0.22 and 0.02 μm in diameter; there was a strong negative correlation between salinity and freezing temperatures; and concentrations of INPs could not be explained by chlorophyll a concentrations. Unique in the current study, the spatial distributions of INPs were similar in 2014 and 2016, and the concentrations of INPs were strongly correlated with meteoric water (terrestrial runoff plus precipitation). These combined results suggest that meteoric water may be a major source of INPs in the sea surface microlayer and bulk seawater in this region, or meteoric water may be enhancing INPs in this region by providing additional nutrients for the production of marine microorganisms. In addition, based on the measured concentrations of INPs in the microlayer and bulk seawater, we estimate that the concentrations of INPs from the ocean in the Canadian Arctic marine boundary layer range from approximately 10-4 to < 10-6 L-1 at-10 ° C. © 2019 Author(s).
语种	英语
scopus关键词	atmospheric chemistry; boundary layer; concentration (composition); ice crystal; marine atmosphere; sea surface; seawater; spatial distribution; summer; Canada; Canadian Arctic
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/144342
作者单位	Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada; Department of Physics and Atmospheric Science, Dalhousie University, Sir James Dunn Building, 6310 Coburg Road, Halifax, NS B3H 4R2, Canada; Department of Geography, University of Calgary, 2500 University Drive, Calgary, AB T2N 1N4, Canada; Department of Chemistry, University of Toronto, 80 St George Street, Toronto, ON M5S 3H6, Canada; Institut des Sciences de la Mer de Rimouski, Université du Québec À Rimouski, 310 Allée des Ursulines, Rimouski, Québec, QC G5L 3A1, Canada; Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC V8L 4B2, Canada
推荐引用方式 GB/T 7714	Irish V.E.,Hanna S.J.,Xi Y.,et al. Revisiting properties and concentrations of ice-nucleating particles in the sea surface microlayer and bulk seawater in the Canadian Arctic during summer[J],2019,19(11).
APA	Irish V.E..,Hanna S.J..,Xi Y..,Boyer M..,Polishchuk E..,...&Bertram A.K..(2019).Revisiting properties and concentrations of ice-nucleating particles in the sea surface microlayer and bulk seawater in the Canadian Arctic during summer.Atmospheric Chemistry and Physics,19(11).
MLA	Irish V.E.,et al."Revisiting properties and concentrations of ice-nucleating particles in the sea surface microlayer and bulk seawater in the Canadian Arctic during summer".Atmospheric Chemistry and Physics 19.11(2019).