Академическое издательство «Гео»

Laidas (tidal flats), permafrost, mean annual temperature, temperatures gradient, heat flow



KRIOSFERA ZEMLI, 2018, Vol. XXII, № 5, p. 39-46

Permafrost aggradation in tidal flats
of the Kara Sea

A.A. Vasiliev1,2, G.E. Oblogov1,2, I.D. Streletskaya3, R.S. Shirokov1

1Earth Cryosphere Institute, Tyumen Scientific Center SB RAS,
P/O box 1230, Tyumen, 625000, Russia; al.a.vasiliev@gmail.com, oblogov@mail.ru
2Tyumen State University, 6, Volodarskogo str., Tyumen, 625003, Russia
3Lomonosov Moscow State University, 1, Leninskie Gory, Moscow, 119991, Russia

The low accumulative laidas (tidal flats) are the areas of the permafrost aggradation. Long-term observations of the thermal regime of upper permafrost have been carried out at the two sites – Marre-Sale (western coast of the Yamal peninsula), and Sopochnaya Karga (western coast of the Taymyr peninsula). Mean annual ground temperature is –3.5…–4.5 °C at Marre-Sale, and –4.8…–7.7 °C at Sopochnaya Karga. Heat flow from atmosphere to the upper permafrost can reach 3.4 W/m2. A high correlation between the heat flows and the average annual air temperature anomalies has been established.

Laidas (tidal flats), permafrost, mean annual temperature, temperatures gradient, heat flow

DOI: 10.21782/KZ1560-7496-2018-5(39-46)

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