Академическое издательство «Гео»

Soil temperature regime, road, peat plateau, climate change, permafrost

KRIOSFERA ZEMLI, 2020, № 1, p. 23-33

Specifity of the present-day soil temperature regime in a peat plateau (southern part of Bolshezemelskaya tundra) at locations crossed by regional highway

D.A. Kaverin, A.V. Pastukhov, A.B. Novakovsky

Institute of Biology, Komi Scientific Center UB RAS,
28, Kommunisticheskaya str., Syktyvkar, 167982, Russia; dkav@mail.ru

The study investigates characteristics of the present-day temperature regime of anthropogenically transformed and virgin permafrost-affected soils of the peat plateau at a location crossed by the Usinsk–Kharyaga higway with its concrete surface partially destroyed. To assess the specifics of soil temperature regime, the research was carried out in 2015–2018 at the southern limit of permafrost in the Bolshezemelskaya tundra during periods of relatively high air temperatures. Soil temperatures of the peat plateau and a roadside hollow were measured in two 10-meter thermal boreholes. To study the temperature dynamics of the roadway embankment, a 5-meter high site backfilled with stockpiled sand with rather similar basic characteristics, was used as its model. Results of the study have revealed that construction of a road embankment on the southern permafrost limit in the Russian European Northeast entails a significant temperature differentiation of anthropogenically transformed soils. Violations of building codes and further road operation under ongoing climate warming have led to a significant soil temperature increase and partial roadbed destruction.

Soil temperature regime, road, peat plateau, climate change, permafrost

DOI: 10.21782/KZ1560-7496-2020-1(23-33)