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A study of stable isotopic variations of antarctic snow by albedo differences

Title
A study of stable isotopic variations of antarctic snow by albedo differences
Authors
Lee J.Han Y.Ham J.-Y.Na U.-S.
Ewha Authors
이정훈
SCOPUS Author ID
이정훈scopus
Issue Date
2015
Journal Title
Ocean and Polar Research
ISSN
1598-141XJCR Link
Citation
vol. 37, no. 2, pp. 141 - 147
Keywords
Isotopic composition of snowMelting ratesSnow’s albedoTephra
Publisher
Korea Ocean Research and Development Institute
Indexed
SCOPUS; KCI scopus
Abstract
Snow albedo can be decreased if there are any impurities on the snow surface other than the snow itself. Due to the decrease of snow albedo, melting rates of surface snow can increase, which is very crucial in climate change and hydrogeology in many parts of the world. Anthropogenic black carbons caused by the incomplete combustion of fossil fuel affect snow and tephra particles generated by geologic volcanic activities reduce snow albedo. In this study, we investigated isotopic compositions for snow covered by tephra particles and compared with this with clean snow. Isotopic compositions of snow with tephra statistically show more enriched than those of clean snow (p < 0.02). This can be explained by the fact that snow becomes enriched in 18O or D relative to meltwater as melting rates are increased. In addition, the slopes of the linear regression between oxygen and hydrogen for snow with tephra and clean snow are 6.7 and 8, respectively, and the latter is similar to that of the global meteoric water line of 8. Therefore, we can conclude that snow impurities control the isotopic compositions of snow, which is very crucial in the study of climate change and hydrogeology. To quantitatively explain these observations, melting experiments and numerical approaches are required. © 2015 Korea Ocean Research and Development Institute. All rights reserved.
DOI
10.4217/OPR.2015.37.2.141
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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