Holocene oxygen isotope record of diatoms from Lake Kotokel (southern Siberia, Russia) and its palaeoclimatic implications

Kostrova, Svetlana; Meyer, Hanno; Chapligin, Bernhard; Kossler, Annette; Безрукова, Е. В.; Tarasov, Pavel E.

doi:10.1016/j.quaint.2012.05.011

Cited by 38 publications

(51 citation statements)

References 79 publications

(120 reference statements)

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“…The character of the diatom isotope record obtained for TYL is similar to that obtained for Lake Kotokel (Kostrova et al, 2013), Kola Peninsula (Jones et al, 2004), Lake Baikal (Mackay et al, 2011) and Swedish Lapland (Lake 850: Shemesh et al, 2001). All curves show a general Mid to Late Holocene depletion in δ 18 O diatom through the cores from 4.5 kyr BP to the present, which is in line with many other climate reconstructions of the northern hemisphere (Wanner et al, 2008).…”

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confidence: 86%

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Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Meyer

Chapligin

Hoff

et al. 2015

Global and Planetary Change

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Especially in combination with other proxies, the oxygen isotope composition of diatom silica (δ 18 O diatom ) from lake sediments is useful for interpreting past climate conditions. This paper presents the first oxygen isotope data of fossil diatoms from Kamchatka, Russia, derived from sediment cores from Two-Yurts Lake (TYL). For reconstructing Late Holocene climate change, palaeolimnological investigations also included diatom, pollen and chironomid analysis. The most recent diatom sample (δ 18 O diatom = +23.3‰) corresponds well with the present day isotopic composition of the TYL water (mean δ 18 O = −14.8‰) displaying a reasonable isotope fractionation in the system silicawater. Nonetheless, the TYL δ 18 O diatom record is mainly controlled by changes in the isotopic composition of the lake water. TYL is considered as a dynamic system triggered by differential environmental changes closely linked with lake-internal hydrological factors. The diatom silica isotope record displays large variations in δ 18O diatom from +27.3‰ to +23.3‰ from about 4.5 kyr BP until today. A continuous depletion in δ 18O diatom of 4.0‰ is observed in the past 4.5 kyr, which is in good accordance with other hemispheric environmental changes (i.e. a summer insolation-driven Mid-to Late Holocene cooling). The overall cooling trend is superimposed by regional hydrological and atmospheric-oceanic changes. These are related to the interplay between Siberian High and Aleutian Low as well as to the ice dynamics in the Sea of Okhotsk. Additionally, combined δ 18O diatom and chironomid interpretations provide new information on changes related to meltwater input to lakes. Hence, this diatom isotope study provides further insight into hydrology and climate dynamics of this remote, rarely investigated area.

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confidence: 86%

“…O diatom due to greater meltwater input from higher altitudes has been described for Lake Kotokel in the Lake Baikal area (Kostrova et al, 2013). The subsequent decrease in δ 18 O diatom (after 4 kyr BP) could be related to melting of the glacier in the hinterland as supported by a simultaneous increase in T air July from the chironomid-based reconstruction.…”

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confidence: 74%

Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Meyer

Chapligin

Hoff

et al. 2015

Global and Planetary Change

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“…The range of δ 18 Odiatom in the core from Vydrino Shoulder (+25.3‰ to +31.1‰) (Fig. 7) is similar to that observed at nearby Lake Kotokel (+23.7‰ to +36‰), despite the significantly different controls and isotope setting of this smaller lake (Kostrova et al, 2013) (Fig. 1).…”

Section: Holocene Reconstruction Of Central Asian Precipitationsupporting

confidence: 68%

Lake Baikal isotope records of Holocene Central Asian precipitation

Swann

Mackay²,

Вологина

et al. 2018

Quaternary Science Reviews

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Climate models currently provide conflicting predictions of future climate change across Central Asia. With concern over the potential for a change in water availability to impact communities and ecosystems across the region, an understanding of historical trends in precipitation is required to aid model development and assess the vulnerability of the region to future changes in the hydroclimate. Here we present a record from Lake Baikal, located in the southern Siberian region of central Asia close to the Mongolian border, which demonstrates a relationship between the oxygen isotope composition of diatom silica (δ 18 Odiatom) and precipitation to the region over the 20 th and 21 st Century. From this, we suggest that annual rates of precipitation in recent times are at their lowest for the past 10,000 years and identify significant long-term variations in precipitation throughout the early to late Holocene interval. Based on comparisons to other regional records, these trends are suggested to reflect conditions across the wider Central Asian region around Lake Baikal and highlight the potential for further changes in precipitation with future climate change.

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“…A number of qualitative climatic and environment reconstructions published to date demonstrate a complicated and partly controversial picture of climate changes during the LGM and late glacial in the Baikal region (Bo€ es et al, 2005;Demske et al, 2005;Bezrukova et al, 2010;Mackay et al, 2011). Therefore, oxygen isotope data from small lakes in the region could be helpful in resolving some of the problematic questions, as recently demonstrated by the Holocene oxygen isotope record of diatoms from Lake Kotokel (Kostrova et al, 2013a, b).…”

Section: Valuesmentioning

confidence: 99%

The last glacial maximum and late glacial environmental and climate dynamics in the Baikal region inferred from an oxygen isotope record of lacustrine diatom silica

Kostrova

Meyer

Chapligin

et al. 2014

Quaternary International

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a b s t r a c tThe last glacial maximum and late glacial environmental and climatic variability in the Baikal region, southern Siberia, Russia has been studied in a sediment sequence from Lake Kotokel, located 2 km east of Lake Baikal, using the oxygen isotope composition of diatom silica (d 18 O diatom ). The purification of diatom frustules involved the process of trimethylsilylation, which has been shown to be suitable for preparation of diatoms for oxygen isotope analysis. The Lake Kotokel d 18O diatom record presented here spans intervals from about 24.6 to 22.9 ka BP (further referred to as 'last glacial maximum') and~16.7e11.5 ka BP (further referred to as 'late glacial') displaying variations in the oxygen isotope composition between þ26.7 and þ31.2‰. Overall high d18 O diatom values of about þ29 to þ31‰ during the two investigated intervals characterize a strongly evaporative lake system in a dry environment and suggest a lower than present lake level due to enhanced evaporation. The Lake Kotokel diatom isotope record is roughly in line with the 60 N summer solar insolation, pointing to a linkage to broader-scale climate change, but displays weaker reaction to short-term climatic oscillations, i.e. Bølling-Allerød or Younger Dryas. The climate warming at~14.3 ka BP is marked by negative spikes in the d18 O diatom record due to isotopically low melt water input from the mountainous hinterland.

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Holocene oxygen isotope record of diatoms from Lake Kotokel (southern Siberia, Russia) and its palaeoclimatic implications

Cited by 38 publications

References 79 publications

Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Oxygen isotope composition of diatoms as Late Holocene climate proxy at Two-Yurts Lake, Central Kamchatka, Russia

Lake Baikal isotope records of Holocene Central Asian precipitation

The last glacial maximum and late glacial environmental and climate dynamics in the Baikal region inferred from an oxygen isotope record of lacustrine diatom silica

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