PERMAFROST AGGRADATION ON 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 two sites: Marre-Sale (western coast of the Yamal Peninsula), and Sopochnaya Karga (western coast of the Taymyr Peninsula). The mean annual ground temperature is –3.5…–4.5 °C at Marre-Sale, and –4.8…–7.7 °C at Sopochnaya Karga. Heat flux from the atmosphere to the upper permafrost can reach 3.4 W/m2. A high correlation between the heat fluxes and the mean annual air temperature anomalies has been established.
Laidas (tidal flats), permafrost, mean annual temperature, temperatures gradient, heat flow