Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.3390/cli9110162
Ключевые слова: climatic variations, holocene glaciers advances, osl dating, radiocarbon dating, russian altai, tree ring analysis, upper timber limit
Аннотация: Analysis of new chronological data, including 55 radiocarbon, 1 OSL, and 8 dendrochronological dates, obtained in the upper reaches of trough valleys within the Katun, North Chuya, South Chuya, and Chikhachev ranges, together with the 55 previously published ones, specifies climatically driven glacier dynamic in the Russian Altai. Показать полностьюAvailable data refute the traditional concept of the Russian Altai Holocene glaciations as a consecutive retreat of the Late Pleistocene glaciation. Considerable and prolonged warming in the Early Holocene started no later than 11.3–11.4 cal kBP. It caused significant shrinking or even complete degradation of alpine glaciers and regeneration of forest vegetation 300–400 m above the modern upper timber limit. Stadial advances occurred in the middle of the Holocene (4.9–4.2 cal kBP), during the Historical (2.3–1.7 cal kBP), and the Aktru (LIA thirteenth–nineteenth century) stages. New radiocarbon ages of fossil soils limited glaciers expansion in the Middle Holocene by the size of the Historical moraine. Lesser glacial activity between 5 and 4 cal kBP is also supported by rapid reforestation in the heads of trough valleys. Glaciers advance within the Russian Altai, accompanied by accumulation of the Akkem moraine, could have occurred at the end of the Late Pleistocene. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Журнал: Climate
Выпуск журнала: Vol. 9, Is. 11
Номера страниц: 162
ISSN журнала: 22251154
Издатель: MDPI