Earth’s Cryosphere, 2022, Vol. XXVI, No. 3, p. 3-9.

REGIONAL AND HISTORICAL GEOCRYOLOGY

NEW DATA ON PERMAFROST THICKNESS ON THE LENA–ALDAN INTERFLUVE

A.R. Kirillin^1,*, M.N. Zheleznyak¹, V.I. Zhizhin¹

¹Melnikov Permafrost Institute, Siberian Branch of the Russian Academy of Sciences, ul. Merzlotnaya 36, Yakutsk, 677010 Russia
^*Corresponding author; e-mail: mouks@ya.ru

For the first time, data on the ground temperature to a depth of 650 m in a borehole with a restored thermal regime have been obtained f for the Lena–Aldan interfluve. The results of geothermal measurements attest to an anomalous permafrost thickness for this territory (750–780 m). Changes in the ground temperature with depth reflect the nonstationary thermal regime of permafrost with a negative geothermal gradient to a depth of 200–300 m. The permafrost thickness is estimated, and possible reasons for its difference in relatively nearby areas are considered.

Keywords: Geothermal research, ground temperature, permafrost, Quaternary deposits, thermophysical properties, permafrost thickness

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Recommended citation: Kirillin A.R., Zheleznyak M.N., Zhizhin V.I., 2022. New data on permafrost thickness on the Lena–Aldan interfluve. Earth’s Cryosphere, XXVI (3), 3–9.