The large community ice cellar designs in eastern Chukotka are unique within the Arctic due to the mixed influences from the indigenous Chukchi people and western industry. Community ice cellars here were designed and constructed in the 1950s-60s to accommodate both food stores for local indigenous residents and feed stores for Arctic fox fur farms. Like much of the Arctic, this region is undergoing unprecedented climate change. Air temperatures within the study area have been increasing at an average rate of 0.7°C per decade since the 1950s. Exacerbating the adverse effects of the warming climate is the lack of ice cellar maintenance in communities where the fur industry did not survive the transition to a market economy. Today, all but two community ice cellars in eastern Chukotka have flooded or collapsed. Presented in this work are thermal records from two cellars in the region that allow for both climatic and anthropogenic influences on the cellars’ structural integrity to be evaluated. Particularly effective ice cellar maintenance practices utilized in the community of Lorino were 1) wintertime ventilation, and 2) placing large blocks of river ice in the cellar in spring to mitigate spring and summer warming.

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The massive ice (MI) bodies are widespread phenomena on Chukotka coastal plains. Although they have been studying since 1930s, stable isotope method was applied for the ice beds quite recently. In this study cryostratigraphy and stable oxygen and hydrogen isotope composition of MI bodies on the extreme North-Eastern Chukotka (near Lavrentiya settlement and Koolen’ lake) have been studied in detail. It was concluded that studied MI bodies have intrasedimental origin and most likely are dated back to the Late Pleistocene age. Mean δ18O values range from –18.5 ‰ to –15 ‰ whereas mean δ2 H values range from –146‰ to –128 ‰ that is higher than expected for the Late Pleistocene ice bodies in this region, which most likely resulted from isotopic fractionation during freezing of water-saturated sediments in a closed system when forming ice became isotopically enriched compared with initial water. The analysis of co-isotope ratios for MI shows that initial water is mainly of meteoric origin (precipitation, water of lakes and taliks).