Glaciers and meltwater flux to Lake Baikal during the Last Glacial Maximum

Osipov, E. Yu.; Khlystov, Oleg

doi:10.1016/j.palaeo.2010.01.031

Cited by 48 publications

(28 citation statements)

References 24 publications

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“…The decline of diatoms in the Baikal records during the glacial stages was likely due to a combination of prevailing cold temperatures, increased turbidity of the lake water and decreased nutrient supply (Bezrukova et al 1991;Karabanov et al 1992;Bradbury et al 1994). Glaciers intensively occupied large areas around Lakes Baikal and Khubsugul during cold periods in the Pleistocene and they could be an effective source of glacier flour (Back and Strecker 1998;Osipov et al 2003;Fedotov et al 2008;Osipov and Khlystov 2010).…”

Section: Discussionmentioning

confidence: 99%

Impact of glacier changes on ecosystem of proglacial lakes in high mountain regions of East Siberia (Russia)

et al. 2015

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Mountain lakes in East Siberia have been studied for recent changes in water chemistry, turbidity and diatom assemblages preserved in bottom sediments. We performed a regional analysis of the relative effect of climate and glacier changes on change in diatom diversity and supply of meltware in proglacial lakes. We analysed sediment records from East Siberian glacier lakes using geochemical and diatoms proxies. We found that dramatic changes in communities and abundance of diatoms and biogenic proxy could be induced by low nutrient concentrations in glacial lakes and high turbidity due to active degradation of glaciers and snow patches as a result of the global increase in temperature in the Northern Hemisphere. Our evidences show that diatoms have been gradually decreased since ca. the 1880s. A significant tendency towards diatom reducing occurred at high summer regional temperatures. This tendency may be attributed to the fact that glaciers and snow patches thawed actively in East Siberia during ca. 1880-1958, which was induced by the beginning of the Recent Warming (ca. 1850-1860) and a long period of relatively warm regional climate from ca. 1900 to 1960.

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Section: Discussionmentioning

confidence: 99%

Impact of glacier changes on ecosystem of proglacial lakes in high mountain regions of East Siberia (Russia)

et al. 2015

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“…They were unable to offer an explanation for this, and suggested that further work was required. Possibilities include the introduction of old CO 2 via the influx of glacial meltwater (Osipov and Khlystov 2010), dead carbon from methane hydrates (Prokopenko and Williams 2004), and the residence time of water within the lake itself.…”

Section: Introductionmentioning

confidence: 99%

Freshwater Reservoir Offsets Investigated Through Paired Human-Faunal¹⁴C Dating and Stable Carbon and Nitrogen Isotope Analysis at Lake Baikal, Siberia

et al. 2014

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Thirty-three paired accelerator mass spectrometry (AMS) radiocarbon dates on human and terrestrial faunal remains from the same Neolithic and Early Bronze Age graves are used to develop a correction for the freshwater reservoir effect (FRE) at Lake Baikal, Siberia. Excluding two outliers, stable nitrogen isotope (δ 15 N) values show a positive correlation (r 2 = 0.672, p < 0.000) with offsets in 14 C yr between paired human and fauna determinations. The highest offset observed in our data set is 622 yr, which is close to the value of ~700 yr suggested for endemic seals in the lake. For each per mil increase in δ 15 N, the offset increases by 77 ± 10 yr in the overall data set. However, there are indications that different regression models apply in each of two microregions of Cis-Baikal. In the first, sites on the southwest shore of the lake and along the Angara River show a strong positive correlation between δ 15 N values and offsets in 14 C yr (r 2 = 0.814, p < 0.000). In the other, the Little Sea, both δ 13 C and δ 15 N values make significant contributions to the model (adjusted r 2 = 0.878; δ 13 C p < 0.001; δ 15 N p < 0.000). This can be related to the complex 13 C ecology of the lake, which displays one of the widest ranges of δ 13 C values known for any natural ecosystem. The results will be important in terms of refining the culture-history of the region, as well as exploring the dynamic interactions of hunter-gatherer communities both synchronically and diachronically.

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“…We favour the former interpretation based on the fact that on Bolshoi Ushkanii Island (see Figure 2 for location) 10 terraces have been recorded, with the highest 216 m above the present level of Lake Baikal (Lamakin 1952). In addition to higher terraces, underwater terraces have been also recorded, supporting a low level of Lake Baikal at beginning of MIS 2 (Osipov and Khlystov 2010). An additional study of Lake Baikal terraces is required, however.…”

Section: Palaeo-manzurka Sediments From Jurassic Sedimentsmentioning

confidence: 83%

“…The region near Kharbatovo is located too distant from high mountains and at altitudes too low for glaciation (e.g. Osipov and Khlystov 2010).…”

Section: General Geological Situationmentioning

confidence: 99%

Catastrophic outburst and tsunami flooding of Lake Baikal: U–Pb detrital zircon provenance study of the Palaeo-Manzurka megaflood sediments

Ivanov

Demonterova

Резницкий

et al. 2015

International Geology Review

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Lake Baikal, the largest freshwater reservoir on Earth (~600 × 30 km in size and up to 1.6 km in depth), has more than 300 contributing rivers but only one N-trending outflow -River Angara. In the Pliocene or Pleistocene, another N-trending outflow operated through the Palaeo-Manzurka to Lena. Provenance analysis using U-Pb dating of detrital zircons from the Palaeo-Manzurka sediments demonstrates that the dominant source of the zircons was the lake deposits, while the contribution of zircons from local bedrocks was limited to about 8% only. Looking for an explanation of this, we propose a hypothesis that formation of the Palaeo-Manzurka sediments took place in association with a catastrophic mega-landslide (~15 × 3 km) into the lake and the resulting mega-tsunami flooding. ARTICLE HISTORY

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Glaciers and meltwater flux to Lake Baikal during the Last Glacial Maximum

Cited by 48 publications

References 24 publications

Impact of glacier changes on ecosystem of proglacial lakes in high mountain regions of East Siberia (Russia)

Impact of glacier changes on ecosystem of proglacial lakes in high mountain regions of East Siberia (Russia)

Freshwater Reservoir Offsets Investigated Through Paired Human-Faunal¹⁴C Dating and Stable Carbon and Nitrogen Isotope Analysis at Lake Baikal, Siberia

Catastrophic outburst and tsunami flooding of Lake Baikal: U–Pb detrital zircon provenance study of the Palaeo-Manzurka megaflood sediments

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Glaciers and meltwater flux to Lake Baikal during the Last Glacial Maximum

Cited by 48 publications

References 24 publications

Impact of glacier changes on ecosystem of proglacial lakes in high mountain regions of East Siberia (Russia)

Impact of glacier changes on ecosystem of proglacial lakes in high mountain regions of East Siberia (Russia)

Freshwater Reservoir Offsets Investigated Through Paired Human-Faunal14C Dating and Stable Carbon and Nitrogen Isotope Analysis at Lake Baikal, Siberia

Catastrophic outburst and tsunami flooding of Lake Baikal: U–Pb detrital zircon provenance study of the Palaeo-Manzurka megaflood sediments

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Freshwater Reservoir Offsets Investigated Through Paired Human-Faunal¹⁴C Dating and Stable Carbon and Nitrogen Isotope Analysis at Lake Baikal, Siberia