Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis

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 glaci...

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Autores principales:	Anna Agatova, Roman Nepop, Andrey Nazarov, Ivan Ovchinnikov, Piotr Moska
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Holocene glaciers advances climatic variations upper timber limit radiocarbon dating tree ring analysis OSL dating Science Q
Acceso en línea:	https://doaj.org/article/b3e9dc7107ff4e75ab633edc1596c519
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spelling	oai:doaj.org-article:b3e9dc7107ff4e75ab633edc1596c5192021-11-25T17:15:22ZClimatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis10.3390/cli91101622225-1154https://doaj.org/article/b3e9dc7107ff4e75ab633edc1596c5192021-10-01T00:00:00Zhttps://www.mdpi.com/2225-1154/9/11/162https://doaj.org/toc/2225-1154Analysis 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. Available 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.Anna AgatovaRoman NepopAndrey NazarovIvan OvchinnikovPiotr MoskaMDPI AGarticleHolocene glaciers advancesclimatic variationsupper timber limitradiocarbon datingtree ring analysisOSL datingScienceQENClimate, Vol 9, Iss 162, p 162 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Holocene glaciers advances climatic variations upper timber limit radiocarbon dating tree ring analysis OSL dating Science Q
spellingShingle	Holocene glaciers advances climatic variations upper timber limit radiocarbon dating tree ring analysis OSL dating Science Q Anna Agatova Roman Nepop Andrey Nazarov Ivan Ovchinnikov Piotr Moska Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis
description	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. Available 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.
format	article
author	Anna Agatova Roman Nepop Andrey Nazarov Ivan Ovchinnikov Piotr Moska
author_facet	Anna Agatova Roman Nepop Andrey Nazarov Ivan Ovchinnikov Piotr Moska
author_sort	Anna Agatova
title	Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis
title_short	Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis
title_full	Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis
title_fullStr	Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis
title_full_unstemmed	Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis
title_sort	climatically driven holocene glacier advances in the russian altai based on radiocarbon and osl dating and tree ring analysis
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b3e9dc7107ff4e75ab633edc1596c519
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Climatically Driven Holocene Glacier Advances in the Russian Altai Based on Radiocarbon and OSL Dating and Tree Ring Analysis

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