RADIOCARBON AGE AND STABLE OXYGEN ISOTOPES IN HOLOCENE ICE WEDGES ON THE COAST OF THE BAYDARATA BAY: RECONSTRUCTION OF THE JANUARY PALEOTEMPERATURE

Abstract

For the first time AMS radiocarbon dating was used to date microinclusions of organic material extracted directly from Holocene syngenetic ice wedges in the European North of Russia on the coast of the Baydarata Bay near the Yarynskaya village, 500 m south of the mouth of the Ngarka-Tambyakha River (68°51′20.27″ N, 66°52′6.51″ E). Dated ice wedges formed about 6.4, 5.0 and 1.9 ka BP. According to isotope oxygen data, the average January air paleotemperature in the Middle and Late Holocene at the coast of the Baydarata Bay was calculated. It is shown that the average January air temperature during this period here varied from about –20 to –25°C, however, during milder winters it could be about –18°C.