Climatically driven late Pleistocene – Holocene hydrological system transformation and landscape evolution in the eastern periphery of Chuya basin, SE Altai, Russia

Непоп, Р. К.; Агатова, А. Р.; Uspenskaya, O. N.

doi:10.1016/j.quaint.2020.01.013

Cited by 7 publications

(5 citation statements)

References 31 publications

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“…Probably, at that time, mountain forests formed a tree belt along the slopes of the Chikhachev and Sailugem ranges, and the Ukok high-mountain plateau united with the forests in northwestern Mongolia, where they were widespread until the middle of the Holocene [74]. The fossil forest soils of about 11-8 cal kBP and Larix sibirica charcoal fragments of about 9-7.8 cal kBP discovered within the eastern mountain periphery of the Chuya Basin also indicate a prolonged period of forestation of the now treeless landscapes [45,59].…”

Section: Discussionmentioning

confidence: 93%

“…Glaciers within the eastern periphery of the Chuya basin at that time completely disappeared or retreated above 2500 m a.s.l. [59]. The Late Dryas cooling of about 13-12 ka BP is reported for neighboring areas of the SW Tuva [68], but it is not clear what moraines in the trough valleys of the SE Altai could be associated with the possible glacier advances at that time.…”

Section: Discussionmentioning

confidence: 99%

“…In the Boguty river valley, buried charcoals of Larix sibirica of about 7.4 cal kBP (IGAN AMS 6525, Table 2) were found near the Upper Boguty lake at 2473 m a.s.l. Earlier, at the same altitude, the charcoals of larches aged 9.3-10 and 8.3-8.6 cal kBP (Table S1) were repeatedly found 10 km downstream the valley, within the mountain framing of Low Boguty lake [24,45,59]. Today, the Boguty valley, like other valleys of the Chikhachev and Sailugem ranges, is completely treeless.…”

Section: Chikhachev Rangementioning

confidence: 98%

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

Агатова

Непоп

Nazarov

et al. 2021

Climate

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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.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Chikhachev Rangementioning

confidence: 98%

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

Агатова

Непоп

Nazarov

et al. 2021

Climate

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“…The papers by Agatova et al (2020) and Nepop et al (2020) report the results of palaeohydrologic investigations carried out in parts of Siberia bordering Mongolia in the Altai and Tuva regions. Both studies present field surveys and related palaeoenvironmental and chronostratigraphic data from regions that are still largely unexplored and characterized by continuous permafrost.…”

mentioning

confidence: 99%

“…During the Holocene, the lake underwent a progressive trend of contraction and lake level lowering, but this was repeatedly interrupted by highstands up to 15 m above the present level. Nepop et al (2020) investigated an area in the most arid part of the Russian Altai, at the western side of the Chikhachev Range, that separates this zone from the one studied by Agatova et al (2020). In the area the glaciers had already strongly retreated before 14 ka cal BP, leading to the formation of several naturally dammed lakes.…”

mentioning

confidence: 99%