Lanscapes of Cold Regios
Chizhova J.N. —
The deuterium excess in three snowfalls in the Caucasus and the Polar Urals and the corresponding HYSPLIT back trajectories of air mass
// Arctic and Antarctica.
– 2018. – ¹ 2.
– P. 113 - 126.
DOI: 10.7256/2453-8922.2018.2.26985 URL: http://en. nbpublish.com/library_read_article.php?id=26985
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The article discusses variations in the values of δ18O, δ2H, dexc of snow on Krasnaya Polyana, the southern slope of Elbrus and on the transect from Konosha to the Polar Urals. In each of the described snowfalls, the deuterium excess is a unique isotope mark of the prevailing process involved in the formation of the isotope composition of the snow cover. To interpret the values of obtained isotopes, we used the method of back trajectories by the HYSPLIY model. The main goal of the work is to demarcate the main processes responsible for the formation of the isotope composition of snow. On the Aibga slope in Caucasus, there is addition of a continental water vapor on the southern slope of Elbrus – wind erosion, and isotope fractionation during condensation in a single snowfall from Konosha to the Polar Urals. The back trajectories of air mass movement help considering in more detail the formation of the isotope composition of individual snowfalls.
precipitation, Polar Ural, Caucaus, snowfall, deuterium excess, hydrogen isotopes, oxygen isotopes, air mass, trajectories, HYSPLIT model
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