气候变化领域集成服务门户(CCPortal): Technical note: Sea salt interference with black carbon quantification in snow samples using the single particle soot photometer

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DOI	10.5194/acp-21-9329-2021
	Technical note: Sea salt interference with black carbon quantification in snow samples using the single particle soot photometer
	Zanatta M.; Herber A.; Jurányi Z.; Eppers O.; Schneider J.; Schwarz J.P.
发表日期	2021
ISSN	1680-7316
起始页码	9329
结束页码	9342
卷号	21 期号:12
英文摘要	After aerosol deposition from the atmosphere, black carbon (BC) takes part in the snow albedo feedback contributing to the modification of the Arctic radiative budget. With the initial goal of quantifying the concentration of BC in the Arctic snow and subsequent climatic impacts, snow samples were collected during the research vessel (R/V) Polarstern expedition of PASCAL (Physical Feedbacks of Arctic Boundary Layer, Sea Ice, Cloud and Aerosol; Polarstern cruise 106) in the sea-ice-covered Fram Strait in early summer 2017. The refractory BC (rBC) content was then measured in the laboratory of the Alfred Wegener Institute with the single particle soot photometer (SP2). Based on the strong observational correlations between both rBC concentration and rBC diameter with snow salinity, we hypothesize a salt-induced matrix effect interfering with the SP2 analysis. This paper evaluates the impact of sea salt, based on the measurement of electrical conductivity (κ) in water samples, on rBC measurements made with a SP2 nebulizer technique. Under realistic salinity conditions, laboratory experiments indicated a dramatic six-fold reduction in observed rBC concentration with increasing salinity. In the salinity conditions tested in the present work (salt concentration below 0.4L-1) the impact of salt on the nebulization of water droplets might be negligible. However, the SP2 mass detection efficiency systematically decreased with increasing salinity, with the smaller rBC particles being preferentially undetected. The high concentration of suspended salt particles and the formation of thick salt coatings on rBC cores caused problems in the SP2 analog-to-digital conversion of the signal and incandescence quenching, respectively. Changes to the signal acquisition parameters and the laser power of the SP2 improved the mass detection efficiency, which, nonetheless, stayed below unity. The present work provides evidence that a high concentration of sea salt undermines the quantification of rBC in snow performed with the SP2 nebulizer system described here. This interference has not been previously reported and might affect the future such analysis of rBC particles in snow collected, especially over sea ice or coastal regions strongly affected by sea salt deposition. © 2021 Marco Zanatta et al.
语种	英语
scopus关键词	aerosol; atmospheric deposition; black carbon; photometer; sea ice; sea salt; snow; soot; Arctic; Fram Strait
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/246794
作者单位	Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar-und Meeresforschung (AWI), Bremerhaven, Germany; Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Institute for Atmospheric Physics, Johannes Gutenberg University of Mainz, Mainz, Germany; Chemical Sciences Laboratory, Earth System Research Laboratories, Boulder, CO, United States; LISA, UMR CNRS 7583, Université Paris-Est-Créteil, Université de Paris, Institut Pierre Simon Laplace (IPSL), Créteil, France
推荐引用方式 GB/T 7714	Zanatta M.,Herber A.,Jurányi Z.,et al. Technical note: Sea salt interference with black carbon quantification in snow samples using the single particle soot photometer[J],2021,21(12).
APA	Zanatta M.,Herber A.,Jurányi Z.,Eppers O.,Schneider J.,&Schwarz J.P..(2021).Technical note: Sea salt interference with black carbon quantification in snow samples using the single particle soot photometer.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(12).
MLA	Zanatta M.,et al."Technical note: Sea salt interference with black carbon quantification in snow samples using the single particle soot photometer".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.12(2021).