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DOI	10.5194/acp-21-2105-2021
	Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer
	Fan S.; Gao Y.; Sherrell R.M.; Yu S.; Bu K.
发表日期	2021
ISSN	1680-7316
起始页码	2105
结束页码	2124
卷号	21 期号:3
英文摘要	Size-segregated particulate air samples were collected during the austral summer of 2016-2017 at Palmer Station on Anvers Island, western Antarctic Peninsula, to characterize trace elements in aerosols. Trace elements in aerosol samples - including Al, P, Ca, Ti, V, Mn, Ni, Cu, Zn, Ce, and Pb - were determined by total digestion and a sector field inductively coupled plasma mass spectrometer (SF-ICP-MS). The crustal enrichment factors (EFcrust) and k-means clustering results of particle-size distributions show that these elements are derived primarily from three sources: (1) regional crustal emissions, including possible resuspension of soils containing biogenic P, (2) long-range transport, and (3) sea salt. Elements derived from crustal sources (Al, P, Ti, V, Mn, Ce) with EFcrust 10 were dominated by the coarse-mode particles (1:8 um) and peaked around 4.4 um in diameter, reflecting the regional contributions. Non-crustal elements (Ca, Ni, Cu, Zn, Pb) showed EFcrust 10. Aerosol Pb was primarily dominated by fine-mode particles, peaking at 0.14-0.25 um, and likely was impacted by air masses from southern South America based on air mass back trajectories. However, Ni, Cu, and Zn were not detectable in most size fractions and did not present clear size patterns. Sea-salt elements (Ca, NaC, KC) showed a single-mode distribution and peaked at 2.5-4.4 um. The estimated dry deposition fluxes of mineral dust for the austral summer, based on the particle-size distributions of Al measured at Palmer Station, ranged from 0.65 to 28 mgm2 yr1 with a mean of 5:55:0 mgm2 yr1. The estimated dry deposition fluxes of the target trace elements in this study were lower than most fluxes reported previously for coastal Antarctica and suggest that atmospheric input of trace elements through dry deposition processes may play a minor role in determining trace element concentrations in surface seawater over the continental shelf of the western Antarctic Peninsula. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	aerosol composition; aerosol formation; atmospheric chemistry; chemical composition; concentration (composition); dry deposition; particle size; size distribution; trace element
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/247152
作者单位	Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ 07102, United States; Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, United States
推荐引用方式 GB/T 7714	Fan S.,Gao Y.,Sherrell R.M.,et al. Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer[J],2021,21(3).
APA	Fan S.,Gao Y.,Sherrell R.M.,Yu S.,&Bu K..(2021).Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(3).
MLA	Fan S.,et al."Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.3(2021).