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Mineral dust and major ion concentrations in snowpit samples from the NEEM site, Greenland

Title
Mineral dust and major ion concentrations in snowpit samples from the NEEM site, Greenland
Authors
Kang, Jung-HoHwang, HeejinHong, Sang BumDo Hur, SoonChoi, Sung-DeukLee, JeonghoonHong, Sungmin
Ewha Authors
이정훈
SCOPUS Author ID
이정훈scopus
Issue Date
2015
Journal Title
ATMOSPHERIC ENVIRONMENT
ISSN
1352-2310JCR Link1873-2844JCR Link
Citation
vol. 120, pp. 137 - 143
Keywords
Atmospheric mineral dustMajor ionsSeasonal variationGreenland
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Polar ice sheets conserve atmospheric aerosols at the time of snowfall, which can be used to reconstruct past climate and environmental conditions. We investigated mineral dust and major ion records in snowpit samples obtained from the northwestern Greenland ice sheet near the North Greenland Eemian Ice Drilling (NEEM) camp in June 2009. We analyzed the samples for mineral dust concentrations as well as stable water isotopes (delta O-18, delta D, and deuterium excess) and major ions (Cl-, SO42-, methanesulfonic acid (MSA), Na+ and Ca2+). Seasonal delta O-18 and delta D cycles indicate that the snowpit samples covered a six-year period from spring 2003 to early summer 2009. Concentrations of mineral dust, nss-Ca2+, and nss-SO42- showed seasonal deposition events with maxima in the winter spring layers. On the other hand, the Cl-/Na+ ratio and the concentrations of MSA exhibited maxima in the summer layers, making them useful indicators for the summer season. Moreover, an anomalous atmospheric mineral dust event was recorded at a depth of 165-170 cm corresponding to late winter 2005 to spring 2006. A back trajectory analysis suggests that a major contributor to the Greenland aerosol was an air mass passing over the Canadian Arctic and North America. Several trajectories point to Asian regions as a dust source. The mineral dust deposited at NEEM was strongly influenced by long-range atmospheric transport and dust input from arid source areas in northern China and Mongolia. (C) 2015 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.atmosenv.2015.08.062
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사범대학 > 과학교육과 > Journal papers
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