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| Titel |
The isotopic composition of precipitation and surface layers of glaciers in Central Altai |
| VerfasserIn |
Tatyana Papina, Natalia Malygina, Alla Eyrikh |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250092072
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| Publikation (Nr.) |
 EGU/EGU2014-6398.pdf |
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| Zusammenfassung |
| Please fill in The isotopic composition of precipitation and ice of Altai glaciers can
be successfully used to determine the sources of precipitation (water vapor) and
trajectories of air masses coming to the Altai territory, to study the modern and
paleoclimatic changes in this region and other applied climate and environmental
challenges.
This paper presents the results of the study of seasonal changes in the isotopic
composition of precipitation and surface layers of warm and cold glaciers in Central
Altai.
The isotopic composition of warm glaciers (North Chui Ridge) significantly (by more
than 6.5 ) facilitated relatively mean value of ice core layers from cold Belukha glacier. This
difference primarily may be due to: 1) with multiple cryogenic isotope fractionation of warm
glaciers surface, which leads to the formation of significantly lighter ice isotopic
composition; 2) accumulation of the edge portion of the warm glaciers occurs mainly due to
the winter solid precipitation.
The isotopic composition of summer precipitation (July 2013) in the Central Altai ranged
from -7.55 to -10.28 0/00for δ18O and from -135.20 to -136.04 0/00 for δD, which indicates
that the formation of precipitation fallen on the earth surface of precipitated on
the surface glacier great contribution moisture exchange processes arising from
the passage of moist Atlantic air masses over the territory of the Aral- Caspian
region.
Integrated use of data on the trajectory of air masses (model HYSPLIT), synoptic
situation and the isotopic composition of precipitation can detect features of the formation of
precipitation . For example , it was shown to cause rainfall in the Central Altai July 16, 2013
was the formation of occlusions of Altai, and the moisture in the air mass moving over the
continent to weak evaporative fractionation . |
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