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Isotopic characteristics of snow and its meltwater over the Barton Peninsula, Antarctica

Title
Isotopic characteristics of snow and its meltwater over the Barton Peninsula, Antarctica
Authors
Lee J.Hur S.D.Lim H.S.Jung H.
Ewha Authors
이정훈
SCOPUS Author ID
이정훈scopus
Issue Date
2020
Journal Title
Cold Regions Science and Technology
ISSN
0165-232XJCR Link
Citation
Cold Regions Science and Technology vol. 173
Publisher
Elsevier B.V.
Indexed
SCI; SCIE; SCOPUS scopus
Document Type
Article
Abstract
The stable isotopic compositions of snow and meltwater are a very useful tool to investigate water provenances and to increase the accuracy of paleoclimate studies in glacial watershed systems. To better understand the factors that affect the isotopic compositions of snow and meltwater in the western Antarctic Peninsula, the isotopic compositions of snow/ice and meltwater from the Barton Peninsula in Antarctica were examined. The isotopic compositions of snow are more enriched than those of meltwater and the variability of the isotopic compositions decreases from snow to meltwater. The melting process changes the linear slope between two water isotopes, which is different from the meteoric water line. We observe that the isotopic compositions of snow are altered by tephra, which results in isotopically enriched snow that is covered by tephra. This tephra decreases the snow's albedo, and the increased energy that is absorbed by the snow surface increases the melting rate, which causes isotopic exchange between liquid water and ice. Hydrological processes, such as daily variations in the melting rate and contributions from groundwater/runoff to seawater, also affect the isotopic compositions of water over the Barton Peninsula. Our works imply that uncertainty caused by these variations should be considered when applying stable water isotopes in this area for water flowpath and paleoclimate study. © 2020 Elsevier B.V.
DOI
10.1016/j.coldregions.2020.102997
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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