View : 36 Download: 0

Seasonal variation in the input of atmospheric selenium to northwestern Greenland snow

Title
Seasonal variation in the input of atmospheric selenium to northwestern Greenland snow
Authors
Lee, KhanghyunHong, Sang-BumLee, JeonghoonChung, JiwoongHur, Soon-DoHong, Sungmin
Ewha Authors
이정훈
SCOPUS Author ID
이정훈scopus
Issue Date
2015
Journal Title
SCIENCE OF THE TOTAL ENVIRONMENT
ISSN
0048-9697JCR Link1879-1026JCR Link
Citation
vol. 526, pp. 49 - 57
Keywords
SeleniumSnow pitShort-term variationAnthropogenic contributionCoal combustion
Publisher
ELSEVIER SCIENCE BV
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Oxygen isotope ratio (delta O-18) and concentrations of Al, Na+, methanesulfonic acid(MSA), SO42-, andselenium(Se) in a continuous series of 70 snow samples from a 3.2-m snow pit at a site in northwestern Greenland were determined using ultraclean procedures. Well-defined depth profiles of delta O-18, Al, and sea-salt-Na+ allowed the determination of chronology of the snow pit that spanned approximately 6 years from spring 2003 to summer 2009. Se concentrations were at a low pg/g level, ranging from 7.2 to 45 pg/g, and exhibited high variability with generally higher values during winter and spring and lower values during summer and fall. Very high crustal enrichment factors (EFc) of Se averaging approximately 26,600 for the entire time period indicate a small contribution from crust dust. High Se/MSA ratios are generally observed in the winter and spring snow layers, in which the Se concentrations were relatively high (>20 pg/g). This suggests that a significant component of the Se present in the snow layers is of anthropogenic origin. During the summer season, however, high EFc values are accompanied with low Se/MSA, indicating an increased contribution of marine biogenic sources. Significant correlations between Se, Al, and non-sea-salt SO42- highlight that significant inputs of Se to the snow are likely controlled by the seasonality in the transport efficiency of anthropogenic Se from the source regions to the site. Based on the seasonal changes in Se concentrations, Se/MSA, and Se/S ratios observed in the samples, the input of anthropogenic Se to the site appears to be governed by the long-range transportation of Se emitted from coal combustion in East Asian countries, especially in China. (C) 2015 Elsevier B.V. All rights reserved.
DOI
10.1016/j.scitotenv.2015.04.082
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE