Академическое издательство «Гео»

Thermal regime of permafrost, climate, coastal zone, Western Siberia, Yamal



KRIOSFERA ZEMLI, 2017, Vol. XXI, № 4, p. 34-42

Thermal regime of the upper part of permafrost in the transition zone from land to sea, Western Yamal

A.A. Vasiliev1,2, G.E. Oblogov1,2, I.D. Streletskaya3, V.A. Fedin3, R.S. Shirokov1, N.A. Zadorozhnaia3

1 Earth Cryosphere Institute, SB RAS, 86, Malygina str., Tyumen, 625026, Russia; al.a.vasiliev@gmail.com
2 Tyumen State University, 6, Volodarskogo str. , Tyumen, 625003, Russia
3 Lomonosov Moscow State University, Department of Geography, 1, Leninskie Gory, Moscow, 119991, Russia

This paper analyzes specific features of the thermal regime evolved in the upper portion of permafrost in the transition area between land and sea on western Yamal Peninsula. Based on direct observations, the mean annual temperature of saline sediments is found to be about freezing point in areas where permafrost is subject to degradation, with the depth of zero annual amplitude occurring at 2.5–3.5 m. Permafrost continues to form at low marine laidas, where mean annual temperature of sediments averages –3.9 °C. The depth of layer with zero annual amplitude in this area is less than 3–4 m.

Thermal regime of permafrost, climate, coastal zone, Western Siberia, Yamal

DOI: 10.21782/KZ1560-7496-2017-4(34-42)

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