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| Titel |
Spatial–temporal dynamics of chemical composition of surface snow in East Antarctica along the Progress station–Vostok station transect |
| VerfasserIn |
T. V. Khodzher, L. P. Golobokova, E. Yu. Osipov, Yu. A. Shibaev, V. Ya. Lipenkov, O. P. Osipova, J. R. Petit |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 8, no. 3 ; Nr. 8, no. 3 (2014-05-19), S.931-939 |
| Datensatznummer |
250116157
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| Publikation (Nr.) |
 copernicus.org/tc-8-931-2014.pdf |
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| Zusammenfassung |
| In January of 2008, during the 53rd Russian Antarctic Expedition, surface
snow samples were taken from 13 shallow (0.7 to 1.5 m depth) snow pits along
the first tractor traverse from Progress to Vostok stations, East Antarctica.
Sub-surface snow/firn layers are dated from 2.1 to 18 yr. The total length
of the coast to inland traverse is more than 1280 km. Here we analysed
spatial variability of concentrations of sulphate ions and elements and their
fluxes in the snow deposited within the 2006–2008 time interval. Anions were
analysed by high-performance liquid chromatography (HPLC), and the
determination of selected metals, including Na, K, Mg, Ca and Al, was carried
out by mass spectroscopy with atomization by induced coupled plasma (ICP-MS).
Surface snow concentration records were examined for trends versus distance
inland, elevation, accumulation rate and slope gradient. Na shows a
significant positive correlation with accumulation rate, which decreases as
distance from the sea and altitude increase. K, Ca and Mg concentrations do
not show any significant relationship either with distance inland or with
elevation. Maximal concentrations of these elements with a prominent Al peak
are revealed in the middle part of the traverse (500–600 km from the
coast). Analysis of element correlations and atmospheric circulation patterns
allow us to suggest their terrestrial origin (e.g. aluminosilicates carried
as a continental dust) from the Antarctic nunatak areas. Sulphate
concentrations show no significant relationship with distance inland,
elevation, slope gradient and accumulation rate. Non-sea salt secondary
sulphate is the most important contribution to the total sulphate
budget
along the traverse. Sulphate of volcanic origin attributed to the Pinatubo
eruption (1991) was revealed in the snow pit at 1276 km (depth
120–130 cm). |
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