The pollen record from El’gygytgyn Lake: implications for vegetation and climate histories of northern Chukotka since the late middle Pleistocene

Ложкин, А. В.; Anderson, Patricia M.; Matrosova, T. V.; Minyuk, P. S.

doi:10.1007/s10933-006-9018-5

Cited by 147 publications

(208 citation statements)

References 30 publications

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“…2). The slight shift towards older ages for the base of PG1351, with a new age of 275 ka instead of 252 ka , corresponds to the results of Lozkhin et al (2007), suggesting that the lowermost part of the PG1351 pollen record represents MIS 8.…”

Section: Correlation and Chronologysupporting

confidence: 63%

“…Therefore, it must be assumed that the observed global raise in temperature during stage 5.5 affected the vegetation and the aquatic productivity, but not the conditions in the lake beyond the normal. Clear peaks in the amounts of tree pollen and diatoms, identified by Lozkhin et al (2007) and Cherapanova et al (2007), respectively, led to the conclusion that there was an increase in precipitation (Lozkhin et al, 2007). However, this did not affect the rate of weathering and amount of minerogenic material, because both are generally low during warm phases (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The individual climatic phases correspond to stages and substages of the marine isotopic record, when tuning the records of sediment variability to the Northern Hemisphere insolation Nowaczyk et al, 2007). Additional information on the climatic history was provided from pollen counting (Lozkhin et al, 2007) and diatom analysis (Cherapanova et al, 2007) as well as sedimentological investigations (Asikainen et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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A 350 ka record of climate change from Lake El'gygytgyn, Far East Russian Arctic: refining the pattern of climate modes by means of cluster analysis

et al. 2013

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Rock magnetic, biochemical and inorganic records of the sediment cores PG1351 and Lz1024 from Lake El'gygytgyn, Chukotka peninsula, Far East Russian Arctic, were subject to a hierarchical agglomerative cluster analysis in order to refine and extend the pattern of climate modes as defined by Melles et al. (2007). Cluster analysis of the data obtained from both cores yielded similar results, differentiating clearly between the four climate modes warm, peak warm, cold and dry, and cold and moist. In addition, two transitional phases were identified, representing the early stages of a cold phase and slightly colder conditions during a warm phase. The statistical approach can thus be used to resolve gradual changes in the sedimentary units as an indicator of available oxygen in the hypolimnion in greater detail. Based upon cluster analyses on core Lz1024, the published succession of climate modes in core PG1351, covering the last 250 ka, was modified and extended back to 350 ka. Comparison to the marine oxygen isotope (δ¹⁸O) stack LR04 (Lisiecki and Raymo, 2005) and the summer insolation at 67.5° N, with the extended Lake El'gygytgyn parameter records of magnetic susceptibility (κ_LF), total organic carbon content (TOC) and the chemical index of alteration (CIA; Minyuk et al., 2007), revealed that all stages back to marine isotope stage (MIS) 10 and most of the substages are clearly reflected in the pattern derived from the cluster analysis

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Section: Correlation and Chronologysupporting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A 350 ka record of climate change from Lake El'gygytgyn, Far East Russian Arctic: refining the pattern of climate modes by means of cluster analysis

et al. 2013

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“…Sedimentary archives from the Arctic Ocean can have a much longer time range, but their paleoenvironmental significance often is hampered by slow, partly discontinuous deposition and poor age control (e.g., Nowaczyk et al, 2001;Moran et al, 2006). In the terrestrial Arctic, continuous paleoenvironmental archives are widely restricted to the Holocene and, in a few cases, to the last glacial/interglacial cycle, due to repeated glaciations that led to disturbance of many of the older sediment sequences (e.g., Andreev et al, 2004Andreev et al, , 2009Andreev et al, , 2011Lozhkin et al, 2007;Lozhkin and Anderson, 2011, and references therein). Where older sediments occur, they usually are fragmented and have rather poor age control (e.g., Matthews and Telka, 1997;Ballantyne et al, 2010;Rybczynski et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Late Pliocene and Early Pleistocene vegetation history of northeastern Russian Arctic inferred from the Lake El'gygytgyn pollen record

et al. 2014

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Abstract. The 318 m thick lacustrine sediment record from Lake El'gygytgyn, northeastern Russian Arctic cored by the international El'gygytgyn Drilling Project provides unique opportunities for the time-continuous reconstruction of the regional paleoenvironmental history for the past 3.6 Myr. Pollen studies of the lower 216 m of the lacustrine sediments demonstrate their value as an excellent archive of vegetation and climate changes during the Late Pliocene and Early Pleistocene. About 3.5-3.35 Myr BP, the vegetation at Lake El'gygytgyn, now an area of tundra was dominated by spruce-larch-fir-hemlock forests. After ca. 3.35 Myr BP dark coniferous taxa gradually disappeared. A very pronounced environmental change took place ca. 3.31-3.28 Myr BP, corresponding to the Marine Isotope Stage (MIS) M2, when treeless tundra-and steppe-like habitats became dominant in the regional vegetation. Climate conditions were similar to those of Late Pleistocene cold intervals. Numerous coprophilous fungi spores identified in the pollen samples suggest the presence of grazing animals around the lake. Following the MIS M2 event, larch-pine forests with some spruce mostly dominated the area until ca. 2.6 Myr BP, interrupted by colder and drier intervals ca. 3.043-3.025, 2.935-2.912, and 2.719-2.698 Myr BP. At the beginning of the Pleistocene, ca. 2.6 Myr BP, noticeable climatic deterioration occurred. Forested habitats changed to predominantly treeless and shrubby environments, which reflect a relatively cold and dry climate. Peaks in observed green algae colonies (Botryococcus) around 2.53, 2.45, 2.32-2.305, 2.20 and 2.16-2.15 Myr BP suggest a spread of shallow water environments. A few intervals (i.e., 2.55-2.53, ca. 2.37, and 2.35-2.32 Myr BP) with a higher presence of coniferous taxa (mostly pine and larch) document some relatively shortterm climate ameliorations during Early Pleistocene glacial periods.

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“…latitude regions (e.g. Velichko, 1984;Khotinskiy, 1984;Hubberten 47 et al, 2004;Lozhkin et al, 2007;Kienast et al, 2008). This area has Meyer et al, 2002;Andreev et al, 2002b;Bobrov 59 et al, 2004;Kienast et al, 2005;Sher et al, 2005).…”

mentioning

confidence: 99%

Testate amoebae record from the Laptev Sea coast and its implication for the reconstruction of Late Pleistocene and Holocene environments in the Arctic Siberia

Müller¹,

Bobrov

Schirrmeister

et al. 2009

Palaeogeography, Palaeoclimatology, Palaeoecology

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The pollen record from El’gygytgyn Lake: implications for vegetation and climate histories of northern Chukotka since the late middle Pleistocene

Cited by 147 publications

References 30 publications

A 350 ka record of climate change from Lake El'gygytgyn, Far East Russian Arctic: refining the pattern of climate modes by means of cluster analysis

A 350 ka record of climate change from Lake El'gygytgyn, Far East Russian Arctic: refining the pattern of climate modes by means of cluster analysis

Late Pliocene and Early Pleistocene vegetation history of northeastern Russian Arctic inferred from the Lake El'gygytgyn pollen record

Testate amoebae record from the Laptev Sea coast and its implication for the reconstruction of Late Pleistocene and Holocene environments in the Arctic Siberia

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