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Plutonium fallout reconstructed from an Antarctic Plateau snowpack using inductively coupled plasma sector field mass spectrometry

Title
Plutonium fallout reconstructed from an Antarctic Plateau snowpack using inductively coupled plasma sector field mass spectrometry
Authors
Hwang, HeejinHur, Soon DoLee, JeonghoonHan, YeongcheolHong, SungminMotoyama, Hideaki
Ewha Authors
이정훈
SCOPUS Author ID
이정훈scopus
Issue Date
2019
Journal Title
SCIENCE OF THE TOTAL ENVIRONMENT
ISSN
0048-9697JCR Link

1879-1026JCR Link
Citation
SCIENCE OF THE TOTAL ENVIRONMENT vol. 669, pp. 505 - 511
Keywords
Antarctic snowDome FujiAtmospheric nuclear testRadionuclideIce core
Publisher
ELSEVIER SCIENCE BV
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Anthropogenic plutonium (Pu) in the environment is a result of atmospheric nuclear testing during the second half of the 20th century. In this work, we analyzed a 4-meter deep Antarctic Plateau snowpack characterized by a low snow accumulation rate and negligible snow impurities. These sample conditions enabled us to measure the snowpack Pu fallout by applying inductively coupled plasma sector field mass spectrometry to a few mL of snow melt without purification or preconcentration. Pu concentrations in the reconstructed Pu fallout record for the period after 1956 CE increased and decreased in agreement with past atmospheric nuclear testing. Two peaks and two dips associable with historical events were observed, and the highest peak in 1964(+/- 1) CE approximately coincided with the maximum concentration of non-sea-salt sulfate caused by the Mt. Agung eruption in 1963 CE. Enhanced Pu fallout in the 1970s was attributed the geographical proximity of the Southern Hemispheric nuclear test sites. Our results suggest that by improving the instrumental sensitivity and precision, the potential of the Antarctic ice sheet as an archive of Pu fallout can be further explored and utilized for understanding atmospheric dispersion and for dating ice cores. (C) 2019 Elsevier B.V. All rights reserved.
DOI
10.1016/j.scitotenv.2019.03.105
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사범대학 > 과학교육과 > Journal papers
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