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DOI	10.5194/acp-19-3007-2019
	Concentrations; composition; and sources of ice-nucleating particles in the Canadian High Arctic during spring 2016
	Si M.; Evoy E.; Yun J.; Xi Y.; Hanna S.J.; Chivulescu A.; Rawlings K.; Veber D.; Platt A.; Kunkel D.; Hoor P.; Sharma S.; Richard Leaitch W.; Bertram A.K.
发表日期	2019
ISSN	16807316
起始页码	3007
结束页码	3024
卷号	19 期号:5
英文摘要	Modelling studies suggest that the climate and the hydrological cycle are sensitive to the concentrations of ice-nucleating particles (INPs). However, the concentrations, composition, and sources of INPs in the atmosphere remain uncertain. Here, we report daily concentrations of INPs in the immersion freezing mode and tracers of mineral dust (Al, Fe, Ti, and Mn), sea spray aerosol (NaC and Cl-), and anthropogenic aerosol (Zn, Pb, NO3 , NHC 4 , and non-sea-salt SO2-4 ) at Alert, Canada, during a 3-week campaign in March 2016. In total, 16 daily measurements of INPs are reported. The average INP concentrations measured in the immersion freezing mode were 0:005±0:002, 0:020±0:004, and 0:186±0:040 L-1 at-15,-20, and-25 °C, respectively. These concentrations are within the range of concentrations measured previously in the Arctic at ground level or sea level. Mineral dust tracers all correlated with INPs at-25 °C (correlation coefficient, R, ranged from 0.70 to 0.76), suggesting that mineral dust was a major contributor to the INP population at-25 °C. Particle dispersion modelling suggests that the source of the mineral dust may have been long-range transport from the Gobi Desert. Sea spray tracers were anticorrelated with INPs at-25 °C (R D-0:56). In addition, INP concentrations at-25 °C divided by mass concentrations of aluminum were anti-correlated with sea spray tracers (R D-0:51 and-0:55 for NaC and Cl-, respectively), suggesting that the components of sea spray aerosol suppressed the ice-nucleating ability of mineral dust in the immersion freezing mode. Correlations between INPs and anthropogenic aerosol tracers were not statistically significant. These results will improve our understanding of INPs in the Arctic during spring. © 2019 Author(s).
语种	英语
scopus关键词	aerosol; anthropogenic source; climate modeling; concentration (composition); dust; freezing; hydrological cycle; nucleation; spring (season); Alert; Canada; Canadian Arctic; Ellesmere Island; Gobi Desert; Nunavut; Queen Elizabeth Islands
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/144586
作者单位	Department of Chemistry, University of British Columbia, Vancouver, BC V6Tg1Z1, Canada; Climate Research Divisions, Environment and Climate Change Canada, Toronto, ON M3Hg5T4, Canada; Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Mainz, 55128, Germany
推荐引用方式 GB/T 7714	Si M.,Evoy E.,Yun J.,et al. Concentrations; composition; and sources of ice-nucleating particles in the Canadian High Arctic during spring 2016[J],2019,19(5).
APA	Si M..,Evoy E..,Yun J..,Xi Y..,Hanna S.J..,...&Bertram A.K..(2019).Concentrations; composition; and sources of ice-nucleating particles in the Canadian High Arctic during spring 2016.Atmospheric Chemistry and Physics,19(5).
MLA	Si M.,et al."Concentrations; composition; and sources of ice-nucleating particles in the Canadian High Arctic during spring 2016".Atmospheric Chemistry and Physics 19.5(2019).