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Arctic and Antarctica
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Holocene Optimum treeline level in the Suntar-Khayata Range
Lytkin Vasilii Mikhailovich

PhD in Geography

Scientific Associate, the Laboratory of General Geocryology, Melnikov Permafrost Institute of the Siberian Branch of the Russian Academy of Sciences

677010, Russia, respublika Sakha (Yakutiya), g. Yakutsk, ul. Merzlotnaya, 36

gidro1967@mail.ru

Article was received:

06-08-2019


Review date:

06-08-2019


Abstract.

This paper presents the results of a study of the Kamenka-1 section. This unique exposure is located 1,712 m asl in the upper reaches of the Kamenka River, on the northeastern slope of the mountains surrounding Mountain Mus-Khaya (2,959 m, Suntar-Khayata Range). A sample was taken from the stump horizon to determine the absolute age. A soil horizon was identified, the upper part of which contained numerous larch stumps in a natural (upright) position. The stump horizon is partially buried by a 1.5-m layer of fine rubble and silt. It has been dated to 5.37±0.05 ka BP (MPI-41), suggesting the position of treeline in the study region by the end of the Holocene climatic optimum. It is analyzed in the radiocarbon laboratory of the Melnikov Permafrost Institute of the Siberian Branch of the Russian Academy of Sciences using contemporary equipment – ultra low level liquid scintillation spectrometer Quantulus 1220 (made in U. S.), and chemical installation for benzene synthesis (Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine).

Keywords: glaciers, history of climate, tree-stump horizon, Suntar-Khayata Range, altitudinal zonality, radiocarbon dating, Holocene Optimum, upper tree line, permafrost, climate change

DOI:

10.7256/2453-8922.2019.3.30385

Publish date:

03-10-2019


This article written in Russian. You can find full text of article in Russian here .

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