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Net deposition of mercury to the Antarctic Plateau enhanced by sea salt

Cited 1 time in scopus
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Title
Net deposition of mercury to the Antarctic Plateau enhanced by sea salt
Other Titles
해염에 의하여 증가된 남극 고원 내 수은 침적
Authors
Han, Yeongcheol
Hideaki Motoyama
Chung, Ji Woong
Hong, Sung-Min
Hur, Soon Do
Huh, Youngsook
Subject
Environmental Sciences & Ecology
Keywords
Antarctic snow; Global Hg cycle; Oxidation; Photochemistry; Reduction; Sequestration
Issue Date
2017
Citation
Han, Yeongcheol, et al. 2017. "Net deposition of mercury to the Antarctic Plateau enhanced by sea salt". SCIENCE OF THE TOTAL ENVIRONMENT, 583(1): 81-87.
Abstract
Photochemically driven mercury (Hg) exchange between the atmosphere and the Antarctic Plateau snowpack has been observed. An imbalance in bidirectional flux causes a fraction of Hg to remain in the snowpack perennially, but the factors that control the amount of Hg sequestered on the Antarctic Plateau are not fully understood. We analyzed sub-annual variations in totalHg (HgT) deposition to Dome Fuji over the period of 1986?2010 using cold vapor inductively coupled plasma mass spectrometry and compared concentrations with those of sea salt components (Na+ and Cl?). HgT ranged from 0.12 to 5.19 pg g?1 (n = 78) and was relatively high when the Na+ concentrations were high in the same or underlying snow layers. A significant correlation (r = 0.7) was found between the annual deposition fluxes of HgT and Na+. Despite different origins and behavior of Hg and sea salt, the near-synchronous increases in the concentrations and correlation between the fluxes suggest that sea salt can intervene in the air-snowHg exchange and promote the net deposition of Hg in the Antarctic Plateau.
URI
http://repository.kopri.re.kr/handle/201206/5777
DOI
http://dx.doi.org/10.1016/j.scitotenv.2017.01.008
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