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| Titel |
Seasonal variations of snow chemistry and mineral dust in the snow pit at GV7, Antarctica |
| VerfasserIn |
Jung-Ho Kang, Heejin Hwang, Yongchoul Han, Sang Bum Hong, Khanghyun Lee, Soon Do Hur, Massimo Frezzotti, Biancamaria Narcisi |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250109000
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| Publikation (Nr.) |
 EGU/EGU2015-8850.pdf |
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| Zusammenfassung |
| We conducted the scientific ice coring project led by PNRA and KOPRI during the
2013/2014 Italian-Korean Antarctic Expedition in the framework of International
Partnerships in Ice Core Science (IPICS) to understand the climatic variability in the last
2000 years. In the part of project, we collected a 3.0 m-depth snow pit at the site of GV7 (S
70Ë 41’17.1", E 158Ë 51’48.9", 1950 m a.s.l.), Antarctica. Here, we present the results
obtained from the analysis of the water isotope compositions, the major ion concentrations,
and the mineral dust concentrations from the snow pit. Snow densities and temperatures also
measured in the field. At KOPRI, the samples were melted, then the stable water isotopes,
major ions, and particle size distribution were analyzed with the cavity ring-down
spectrometers (L1102-i, Piccaro), ion chromatography (ICS-2100, Thermo), and coulter
counter (Multisizer 3, Beckman Coulter), respectively. The δ18O varies between
-38.3 and -24.1‰ with a mean value of -31.0‰. The δD ranges between -331 and
-186‰ with a mean value of -243‰. Among the ion concentrations (Na+, Ca2+,
Mg2+, Cl-, SO42-, CH3SO3-(MSA)) from the snow pit, MSA concentrations
show a clear seasonal variation. The mineral dust in the pit characterized with the
differences of the concentration and the particle size distribution by the seasonality.
These data allow us to assume about 4.5 years of snow deposition covered from
2009 to 2013 by these oscillations of the isotopes and geochemical characteristics. |
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