气候变化领域集成服务门户(CCPortal): Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014

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DOI	10.5194/acp-19-1027-2019
	Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014
	Irish V.E.; Hanna S.J.; Willis M.D.; China S.; Thomas J.L.; Wentzell J.J.B.; Cirisan A.; Si M.; Leaitch W.R.; Murphy J.G.; Abbatt J.P.D.; Laskin A.; Girard E.; Bertram A.K.
发表日期	2019
ISSN	16807316
起始页码	1027
结束页码	1039
卷号	19 期号:2
英文摘要	Ice nucleating particles (INPs) in the Arctic can influence climate and precipitation in the region; yet our understanding of the concentrations and sources of INPs in this region remain uncertain. In the following, we (1) measured concentrations of INPs in the immersion mode in the Canadian Arctic marine boundary layer during summer 2014 on board the CCGS Amundsen, (2) determined ratios of surface areas of mineral dust aerosol to sea spray aerosol, and (3) investigated the source region of the INPs using particle dispersion modelling. Average concentrations of INPs at -15, -20, and -25 °C were 0.005, 0.044, and 0.154 L-1, respectively. These concentrations fall within the range of INP concentrations measured in other marine environments. For the samples investigated the ratio of mineral dust surface area to sea spray surface area ranged from 0.03 to 0.09. Based on these ratios and the ice active surface site densities of mineral dust and sea spray aerosol determined in previous laboratory studies, our results suggest that mineral dust is a more important contributor to the INP population than sea spray aerosol for the samples analysed. Based on particle dispersion modelling, the highest concentrations of INPs were often associated with lower-latitude source regions such as the Hudson Bay area, eastern Greenland, or north-western continental Canada. On the other hand, the lowest concentrations were often associated with regions further north of the sampling sites and over Baffin Bay. A weak correlation was observed between INP concentrations and the time the air mass spent over bare land, and a weak negative correlation was observed between INP concentrations and the time the air mass spent over ice and open water. These combined results suggest that mineral dust from local sources is an important contributor to the INP population in the Canadian Arctic marine boundary layer during summer 2014. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; boundary layer; concentration (composition); ice; particulate matter; summer; surface area; Arctic Ocean; Baffin Bay [Arctic Ocean]; Canada; Canadian Arctic; Hudson Bay
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/144695
作者单位	Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada; Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario, ON M5S 3H6, Canada; Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, United States; Université Grenoble Alpes, CNRS, IRD, Grenoble-INP, IGE, Grenoble, 38000, France; Laboratoire Atmosphères, Milieux et Observations Spatiales, Université Pierre et Marie Curie, 4 place Jussieu, Paris, Cedex 05, 75252, France; Air Quality Research Division, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada; Département des Sciences de la Terre et de l'Atmosphère, Université du Québec À Montréal, 201, avenue du Président-Kennedy, Montréal, QC H2X 3Y7, Canada; Climate Research Division, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada; Department of Chemistry, Purdue University, West Lafayette, IN 479...
推荐引用方式 GB/T 7714	Irish V.E.,Hanna S.J.,Willis M.D.,et al. Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014[J],2019,19(2).
APA	Irish V.E..,Hanna S.J..,Willis M.D..,China S..,Thomas J.L..,...&Bertram A.K..(2019).Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014.Atmospheric Chemistry and Physics,19(2).
MLA	Irish V.E.,et al."Ice nucleating particles in the marine boundary layer in the Canadian Arctic during summer 2014".Atmospheric Chemistry and Physics 19.2(2019).