Академическое издательство «Гео»

Ice wedge, Late Pleistocene, permafrost, yedoma, oxygen isotope, radiocarbon, pollen and spores, water chemistry, Plakhino site, northeastern Yakutia



KRIOSFERA ZEMLI, 2018, Vol. XXII, № 5, p. 3-19

Winter air paleotemperatures at 30–12 ka BP in the lower
Kolyma River, Plakhinskii Yar yedoma: evidence from stable isotopes

Yu.K.Vasil’chuk1,2, A.C.Vasil’chuk1

1Lomonosov Moscow State University, Faculties of Geography and Geology,
1, Leninskie Gory, Moscow, 119991, Russia; vasilch_geo@mail.ru
2Tyumen State University, 6, Volodarskogo str., Tyumen, 625003, Russia

A continuous 15–18 m long sequence of permafrost with ice wedges at the Plakhinskii Yar site (Karetovo yedoma, left side of the Stadukhin Channel, lower Kolyma River) has been studied in terms of structure, stable isotopes, radiocarbon ages, major ion chemistry, and spore-pollen spectra. The obtained data allow quantitative estimates of Late Pleistocene permafrost and climate conditions in the area between 30 and 12 ka BP. The study confirms the previous inference that local winters at 30–28 ka BP were much colder than at present.

Ice wedge, Late Pleistocene, permafrost, yedoma, oxygen isotope, radiocarbon, pollen and spores, water chemistry, Plakhino site, northeastern Yakutia

DOI: 10.21782/KZ1560-7496-2018-5(3-19)

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