Inorganic geochemistry of El’gygytgyn Lake sediments (northeastern Russia) as an indicator of paleoclimatic change for the last 250 kyr

Minyuk, P. S.; Brigham‐Grette, Julie; Melles, Martin; Borkhodoev, V. Ya.; Glushkova, O. Yu.

doi:10.1007/s10933-006-9027-4

Cited by 90 publications

(57 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, it is likely that studied sediments accumulated shortly before the impact event, about 3. (Belyi et al, 1994;Minyuk et al, 2006). Thus, pollen and macrofossil data suggest that forests with pine, spruce, birch, alder, and probably some thermophilic trees were growing in the study area at the end of Gauss Chron, shortly before 3.6 Myr BP.…”

Section: Environmental Conditions Before 36 Myr Bpmentioning

confidence: 77%

“…There is little data available concerning environmental conditions across Chukotka before 3.6 Myr BP, and these data are obtained from a number of floodplain outcrops in the Enmyvaam River valley, south of the El'gygytgyn Lake basin (Belyi et al, 1994;Minyuk et al, 2006;Glushkova and Smirnov, 2007, and references therein). The sediments are paleomagnetically dated to the Gauss chron (3.6-2.5 Myr BP) by Minyuk et al (2006).…”

Section: Environmental Conditions Before 36 Myr Bpmentioning

confidence: 99%

“…The sediments are paleomagnetically dated to the Gauss chron (3.6-2.5 Myr BP) by Minyuk et al (2006). They are overlain by the socalled, chaotic impact horizon, containing spherules, whose origin is connected to the El'gygytgyn impact event (Minyuk et al, 2006;Glushkova and Smirnov, 2007).…”

Section: Environmental Conditions Before 36 Myr Bpmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2014

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Environmental Conditions Before 36 Myr Bpmentioning

confidence: 77%

Section: Environmental Conditions Before 36 Myr Bpmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…The 175 m deep, 12 km wide lake lies inside a 3.6 million year old meteorite impact crater that is 18 km wide and has presumably been filling with sediments since the time of the impact. The impact, the crater, the sediment core, and the physical environment are all well-described in a series of prior papers (Belya and Chershnev, 1993;Glushkova, 1993;Layer, 2000;Nowaczyk et al, 2002;Nolan et al, 2003;Cherapanova et al, 2007;Glushkova and Smirnov, 2007;Melles et al, 2007;Minyuk et al, 2007;Nolan and Brigham-Grette, 2007;Brigham-Grette, 2009;Swann et al, 2010) and those found in this special issue (Melles et al, 2012;Minyuk et al, 2013).…”

Section: Introductionmentioning

confidence: 72%

Quantitative and qualitative constraints on hind-casting the formation of multiyear lake-ice covers at Lake El'gygytgyn

Nolan

2013

Clim. Past

View full text Add to dashboard Cite

Analysis of the 3.6 Ma, 318 m long sediment core from Lake El'gygytgyn suggests that the lake was covered by ice for millennia at a time for much of its history and therefore this paper uses a suite of existing, simple, empirical degree-day models of lake-ice growth and decay to place quantitative constraints on air temperatures needed to maintain a permanent ice cover on the lake. We also provide an overview of the modern climatological and physical processes that relate to lake-ice growth and decay as a basis for evaluating past climate and environmental conditions. Our modeling results indicate that modern annual mean air temperature would only have to be reduced by 3.3 °C ± 0.9 °C to initiate a multiyear ice cover and a temperature reduction of at least 5.5 °C ± 1.0 °C is likely needed to completely eliminate direct air–water exchange of oxygen, conditions that have been inferred at Lake El'gygytgyn from the analysis of sediment cores. Once formed, a temperature reduction of only 1–3 °C relative to modern may be all that is required to maintain multiyear ice. We also found that formation of multiyear ice covers requires that positive degree days are reduced by about half the modern mean, from about +608 to +322. A multiyear ice cover can persist even with summer temperatures sufficient for a two-month long thawing period, including a month above +4 °C. Thus, it is likely that many summer biological processes and some lake-water warming and mixing may still occur beneath multiyear ice-covers even if air–water exchange of oxygen is severely restricted

show abstract

“…The sediment consists of alternations of brownish and greenish nonlaminated and laminated greyish silt and clay; including some turbidites with thicknesses of up to 45 cm (Juschus et al, 2009). Former investigations on core PG1351 (Nowaczyk et al, 2002Melles et al, 2007;Minyuk et al, 2007) revealed that anoxic and laminated conditions primarily occur during periods of perennial ice cover and oxic and nonlaminated conditions occur when open water controls mixing of the water body during summer times . In intervals with prevailing anoxic conditions reductive dissolution of magnetite was observed whereas organic matter is well preserved.…”

Section: Settings and Materialsmentioning

confidence: 99%

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

Self Cite

View full text Add to dashboard Cite

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

show abstract

Inorganic geochemistry of El’gygytgyn Lake sediments (northeastern Russia) as an indicator of paleoclimatic change for the last 250 kyr

Cited by 90 publications

References 28 publications

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

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

Quantitative and qualitative constraints on hind-casting the formation of multiyear lake-ice covers at Lake El'gygytgyn

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

Contact Info

Product

Resources

About