Stable Isotopic Composition Of Atmospheric Precipitation And Natural Waters In The Vicinity Of Barentsburg (Svalbard)

In 2016-2017, during Russian Arctic Expedition on Svalbard (RAE-S) we have collected the samples of atmospheric precipitation, terrestrial waters, snow and ice on Spitsbergen island in the vicinity of Gronfjorden. The measurements of stable water isotope content (delta O-18 and delta D) in the atmospheric precipitation has allowed to draw the Local Meteoric Water Line (delta D = 6,93 delta O-18 - 0,35) and to analyze the relationship between the isotopic content and condensation temperature. Aside from this, the d-excess values in precipitation (d(exc) = delta D - 8 delta O-18) was interpreted as a marker of the moisture source. It has been demonstrated that the isotopic content of the surface waters (lakes and rivers) clearly points to the dominating type of feeding (atmospheric, ground) of these hydrological objects. We have discovered the inter-annual variability of the isotopic composition of Lake Kongress water during 2 years and defined the sources of water in its tributes: 13 of them have atmospheric source and 9 - ground source. In general, isotopic content of water in the vicinity of Gronfjorden (mean values are: delta O-18 = -10,3 parts per thousand, delta D = -72,5 parts per thousand) is higher than in other regions of Svalbard.