Last glacial–interglacial vegetation and environmental dynamics in southern Siberia: Chronology, forcing and feedbacks

Безрукова, Е. В.; Tarasov, Pavel E.; Solovieva, Nadia; Krivonogov, Sergey K.; Riedel, Frank

doi:10.1016/j.palaeo.2010.07.020

Cited by 136 publications

(177 citation statements)

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“…To be sure, all these works contribute new and important insights on middle Holocene climates and environments but not of the kind that would necessitate revision of the empirical challenges described above (e.g., Tarasov et al, 2009;Bezrukova et al, 2010Bezrukova et al, , 2011Mackay et al, 2011). Rather, they strengthen our points which, unsurprisingly, resonate well with those made recently in a broader review of interactions between middle Holocene climate change and cultural transitions (Anderson et al, 2007).…”

Section: Empirical Aspectssupporting

confidence: 70%

“…These tasks can take advantage of the existing proxy records for the region, quantitative climate and vegetation reconstructions (Tarasov et al, 2007a(Tarasov et al, , 2009, numerical simulations already in place or in progress (Bush 2004(Bush , 2005White and Bush, 2010), and new proxy data of better resolution we hope to obtain from coring Lake Kotokel" near Baikal (Figure 2; Shichi et al 2009;Bezrukova et al, 2010).…”

Section: Empirical Aspectsmentioning

confidence: 99%

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Environmental change and cultural dynamics of Holocene hunter–gatherers in Northeast Asia: Comparative analyses and research potentials in Cis-Baikal (Siberia, Russia) and Hokkaido (Japan)

Weber

Jordan

Katô

2013

Quaternary International

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(250 words)While substantial progress has been achieved in hunter-gatherer research over the last century, it is still the case that our understanding of the cultural dynamism, variability, and resilience of Holocene hunter-gatherers remains rather impoverished. Emerging archaeological insights suggest that the prehistory of many forager societies included periods of sudden cultural transformation, marked by major shifts in subsistence strategies, settlement patterns and associated social life. Recent theoretical and methodological advances are enabling archaeologists to reconstruct the cultural dynamics of Holocene hunter-gatherers in an unprecedented degree of detail. This is especially true in regions that contain large prehistoric cemeteries, which can provide the base data for bioarchaeological reconstruction of individual life histories, shedding light on forager life-ways, their subsistence strategies and mobility patterns. Renewed attention is also being directed at the role of unstable environments and climate, which would have formed important contextual factors influencing how local cultural dynamics were played out. However, identifying explicit causal links between environmental instability and culture change remains empirically challenging. This paper investigates the major sequences of Holocene hunter-gatherer culture-change in two regions of Northeast Asia and details how the new Baikal-Hokkaido Archaeology Project will be researching the causal factors driving these cultural processes, including the possible role of climate and environment.

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Section: Empirical Aspectssupporting

confidence: 70%

Section: Empirical Aspectsmentioning

confidence: 99%

Environmental change and cultural dynamics of Holocene hunter–gatherers in Northeast Asia: Comparative analyses and research potentials in Cis-Baikal (Siberia, Russia) and Hokkaido (Japan)

Weber

Jordan

Katô

2013

Quaternary International

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“…2) develops mostly in summer at water temperatures from ~7-8 to ~18-20 °C, except for the spring sub-ice species Aulacoseira islandica and Aulacoseira subarctica (Barinova et al, 2006;Bezrukova et al, 2010;Fedotov et al, 2012;Kuzmich, 1988;Popovskaya et al, 2002). During the global cooling event corresponding to MIS 2, mean summer water temperatures were obviously colder than during the MIS 3 and MIS 1 interstadials, inferred to be about 10-12 °C (Bezrukova et al, 2010;Müller et al, 2014). A 6-8°C water cooling leads to 1.2-1.6‰ δ 18 O enrichment, as estimated with regard to the oxygen isotope fractionation between biogenic silica and water corresponding to a temperature coefficient of -0.2‰/°C (Swann and Leng, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…1) was proven (Bezrukova et al, 2008(Bezrukova et al, , 2010Fedotov et al, 2012;Müller et al, 2014;Shichi et al, 2009;Tarasov et al, 2009) to be highly sensitive to heat and moisture variations. High contents of total organic carbon (TOC) and the absence of the reservoir effect allowed reliable dating of the lake sediments (Bezrukova et al, 2010). The Holocene δ 18 O diatom record of the Kotokel sediments at an average resolution of 150 yr (Kostrova et al, 2013a,b) faithfully images the general climate history of the Northern Hemisphere.…”

Section: Introductionmentioning

confidence: 99%

“…The Holocene δ 18 O diatom record of the Kotokel sediments at an average resolution of 150 yr (Kostrova et al, 2013a,b) faithfully images the general climate history of the Northern Hemisphere. In this paper we synthesize partly published (Kostrova et al, 2013a(Kostrova et al, ,b, 2014 and unpublished oxygen isotope data from the most representative Kotokel core KTK2 (Bezrukova et al, 2010); describe the analytical methods; and discuss the responses of the lake system to global change for the past 46 kyr (hereafter the ages are quoted as calibrated using the CalPal curve (http://www.calpal-online.de). The results are compared with the ecological interpretation of spore-pollen and diatom data (Bezrukova et al, 2008;Müller et al, 2014;Shichi et al, 2009;Tarasov et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Oxygen isotope composition of diatoms from sediments of Lake Kotokel (Buryatia)

Kostrova

Meyer

Tarasov³

et al. 2016

Russian Geology and Geophysics

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This is a summary of new oxygen isotope data for diatoms from Lake Kotokel sediments, with implications for responses of the lake system and its environment to global change over the past 46 kyr. Fossil diatoms in all samples are free from visible contamination signatures and contain no more than 2.5% Al 2 O 3 , which ensures reliable reconstructions. The δ 18 O values in diatoms vary between +23.7 and +31.2‰ over the record. The results mainly represent diatom assemblages of summer blooming periods, except for the time span between 36 and 32 kyr, when the isotopic signal rather records a shift from summer to spring blooming conditions. Possible water temperature changes only partly explain the changes in the isotopic record. The observed isotopic patterns are produced mainly by isotope changes in lake water in response to variations in air temperature, hydrology, and atmospheric circulation in the region. During Marine Isotope Stage (MIS) 2 (Last Glacial maximum), high δ 18 O diatom resulted from rapid evaporation and low fluvial inputs. The high δ 18 O values of about +29 to +30‰ during the first half of MIS 1 (Holocene interglacial) suggest an increased share of summer rainfalls associated with southern/southeastern air transport. The δ 18 O decrease to +24‰ during the second half of MIS 1 is due to the overall hemispheric cooling and increased moisture supply to the area by the Atlantic transport. The record of Lake Kotokel sediments provides an example of complex interplay among several climatic controls of δ 18 O diatom in the Late Pleistocene and the Holocene.

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Moisture origin and stable isotope characteristics of precipitation in southeast Siberia

Kostrova

Meyer

Fernandoy

et al. 2019

Hydrological Processes

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The paper presents oxygen and hydrogen isotopes of 284 precipitation event samples systematically collected in Irkutsk, in the Baikal region (southeast Siberia), between June 2011 and April 2017. This is the first high-resolution dataset of stable isotopes of precipitation from this poorly studied region of continental Asia, which has a high potential for isotope-based palaeoclimate research. The dataset revealed distinct seasonal variations: relatively high δ 18 O (up to −4‰) and δD (up to −40‰) values characterize summer air masses, and lighter isotope composition (−41‰ for δ 18 O and −322‰ for δD) is characteristic of winter precipitation. Our results show that air temperature mainly affects the isotope composition of precipitation, and no significant correlations were obtained for precipitation amount and relative humidity.A new temperature dependence was established for weighted mean monthly precipitation: +0.50‰/ C (r 2 = 0.83; p <.01; n = 55) for δ 18 O and +3.8‰/ C (r 2 = 0.83, p < 0.01; n = 55) for δD. Secondary fractionation processes (e.g., contribution of recycled moisture) were identified mainly in summer from low d excess. Backward trajectories assessed with the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model indicate that precipitation with the lowest mean δ 18 O and δD values reaches Irkutsk in winter related to moisture transport from the Arctic. Precipitation originating from the west/southwest with the heaviest mean isotope composition reaches Irkutsk in summer, thus representing moisture transport across Eurasia. Generally, moisture transport from the west, that is, the Atlantic Ocean predominates throughout the year. A comparison of our new isotope dataset with simulation results using the European Centre/Hamburg version 5 (ECHAM5)-wiso climate model reveals a good agreement of variations in δ 18 O (r 2 = 0.87; p <.01; n = 55) and air temperature (r 2 = 0.99; p <.01; n = 71). However, the ECHAM5-wiso model fails to capture observed variations in d excess (r 2 = 0.14; p < 0.01; n = 55). This disagreement can be partly explained by a model deficit of capturing regional hydrological processes associated with secondary moisture supply in summer. K E Y W O R D Satmospheric circulation, Baikal region, d excess, ECHAM5-wiso climate model, HYSPLIT model, stable oxygen and hydrogen isotopes of precipitation

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Last glacial–interglacial vegetation and environmental dynamics in southern Siberia: Chronology, forcing and feedbacks

Cited by 136 publications

References 73 publications

Environmental change and cultural dynamics of Holocene hunter–gatherers in Northeast Asia: Comparative analyses and research potentials in Cis-Baikal (Siberia, Russia) and Hokkaido (Japan)

Environmental change and cultural dynamics of Holocene hunter–gatherers in Northeast Asia: Comparative analyses and research potentials in Cis-Baikal (Siberia, Russia) and Hokkaido (Japan)

Oxygen isotope composition of diatoms from sediments of Lake Kotokel (Buryatia)

Moisture origin and stable isotope characteristics of precipitation in southeast Siberia

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