Dynamic of active layer thickness and permafrost temperature on the Severnaya Zemlya archipelago and in the Lena river delta

Bolshiyanov D.Yu., Makeev V.M., Yozhikov I.S., Koblashov I.D.

DYNAMIC OF ACTIVE LAYER THICKNESS AND PERMAFROST TEMPERATURE ON THE SEVERNAYA ZEMLYA ARCHIPELAGO AND IN THE LENA RIVER DELTA

Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. Issue 11.

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doi: 10.24412/2687-1092-2024-11-476-482

Arctic and Antarctic Research Institute, St.Petersburg, Russia

Abstract. The results of observation of the active layer thickness and permafrost temperature in boreholes on the Severnaya Zemlya Archipelago and in the Lena River Delta are presented. There is no significant rise of active layer thickness today by comparison with 50 year in the past. Active layer thickness varies with a period of 5-10 years during measurement time (on the Severnaya Zemlya since 2016, in the Lens River Delta since 2002). Permafrost temperature on all depths of 27 m deep borehole, drilled in 2006, rise because this borehole is situated in the center of Polar Station “Samoylovskii Island”, where snow accumulation is high. In the 66 m deep borehole, drilled at the place, situated 600 m to the north-east from the Station in 2018, temperatures rises very slow with trends of 0,03°C/year on the depth of 60 m and 0,06°C/year on the depth of 27 m.

Keywords: permafrost, active layer thickness, temperatures in boreholes, many years dynamic, Severnaya Zemlya Archipelago, Lena River Delta

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Cite this article:

Bolshiyanov D.Yu., Makeev V.M., Yozhikov I.S., Koblashov I.D. Dynamic of active layer thickness and permafrost temperature on the Severnaya Zemlya archipelago and in the Lena river delta // Relief and Quaternary deposits of the Arctic, Subarctic and North-West Russia. 2024. Issue 11. P. 476-482.