A5026690291- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Geological Studies and Exploration
- Marine and environmental studies
- Cryospheric studies and observations
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Indigenous Studies and Ecology
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Ancient and Medieval Archaeology Studies
- Peatlands and Wetlands Ecology
- Polar Research and Ecology
- Soil and Environmental Studies
- Historical and Archaeological Studies
- Winter Sports Injuries and Performance
- Hydrocarbon exploration and reservoir analysis
- Landslides and related hazards
- Image Processing and 3D Reconstruction
- Lichen and fungal ecology
- Atmospheric and Environmental Gas Dynamics
- Coastal wetland ecosystem dynamics
- Nuclear Physics and Applications
- Earthquake and Tsunami Effects
Lomonosov Moscow State University
2016-2025
Moscow State University
2009-2024
Russian Academy of Sciences
1997-2000
Institute of Cell Biophysics
1995-1997
Abstract Uncertainty about the geological processes that deposited syngenetically frozen ice‐rich silt ( yedoma ) across hundreds of thousands square kilometres in central and northern Siberia fundamentally limits our understanding Pleistocene geology palaeoecology western Beringia, sedimentary led to sequestration Pg carbon within permafrost whether provides a globally significant record ice‐age atmospheric conditions or just regional floodplain activity. Here, we test hypotheses aeolian...
The subject of the study is permafrost strata composed clayey soils, sandy loams, and loams. It has been shown that layers complex are usually made up ice-rich, dusty, sandy-loamy soils. However, they often represented by ice-rich sandy, sandy-gravel, even gravelly definition provided. Permafrost characterized high ice content (containing more than 50-90% ice), generally rich in organic material 1-2% matter), silty dusty fine late Pleistocene deposits; intermountain basins on slopes, can be...
The current climate warming in the eastern coastal area of Chukotka contributes to deeper seasonal thawing and activation thermal erosional landslides, leading exposure massive ice bodies. exposed courses coastline destruction settlement infrastructure damage. study bodies on coast Chukotka, including radiocarbon AMS dating determination isotopic composition, showed that most studied were formed Late Pleistocene, between 22 27.5 thousand calibrated years ago. Relatively high values...
We looked at the soil profiles on first Holocene terrace of Chara River, where Belen’kiy stream flows into it (Transbaikalia, Russia), to find out how wildfires change post-pyrogenic properties in intermontane depressions North Transbaikalia. In 1994 and 2019 forest fires affected soil. Studied soils were classified as gleysols permafrost subtype (Cryosols Reductaquic Pyric). All showed signs pyrogenesis. Values pHwater varied within range 3.9–5.1, pHKCl – from 3.5 4.9, hydrolytic acidity...
ABSTRACT Lithalsas are found on mires in the discontinuous permafrost circumpolar area of northern hemisphere and mountainous regions. The age growth mechanism lithalsa continental intermountain region East Sayan Mountains were uncertain debated. We represent results a detailed analysis four representative lithalsas, including 14 C dating, C‐N content buried peat lenses, organic matter from soils, as well stable isotope measurements (δ 18 O δ 2 H) lithalsas' ice lenses. It was that studied...
Palaeotemperature reconstruction for the period of 20−18 ka BP in S iberia is here based on δ 18 O analysis and 14 C dating large syngenetic ice wedges. Dozens yedoma exposures, from Y amal P eninsula to hukotka, have been studied. Snow meltwater considered be main source ice‐wedge ice. The modern relationship between composition winter temperature used as a base reconstruction. In wedges (elementary veins that accumulated during last 60–100 years) fluctuates −14 −20‰ western −23 −28‰...
Many mammoth remains have been radiocarbon-dated. We present here more than 360 14 C dates on bones, tusks, molars and soft tissues of mammoths discuss some issues connected with the evolution their environment: problem last mammoth; taphonomy; plant stable isotope records accompanying fossils; paleoclimate during time dating host sediments. The temporal distribution fossils from northern Eurasian territory is even for entire period 40 to 10 ka bp.
The occurrence of well-preserved redeposited organic material is the main limitation for radiocarbon dating syngenetic permafrost sediments. Only (1) autochthonous remains or (2) a series non-inverted dates, in case allochthonous thicknesses, valid. An interpretation oxygen isotope values from ice-wedges considered context several sequences northern Eurasia. Radiocarbon matter host sediments which accumulated synchronously to provides an age attachment determinations. © 1997 John Wiley &...
ABSTRACT The purpose of the study is to compare results stable isotope analysis (δ 18 O, δ 2 H, and deuterium excess values) parallel synchronous ice wedges exposed in one outcrop upper part Batagay Yedoma (67.58° N, 134.77° E) estimate their precision, that is, a measure similarity independent two wedges. Detailed sampling syngenetic (IW‐17 IW‐20) for was carried out exposure thermo‐erosional ravine southeastern megaslump. In total, 105 measurements IW‐17 59 IW‐20 were obtained. According...
Abstract Perennial frost mounds identified as lithalsas occur in the Sentsa River valley of Eastern Sayan Mountains, Russia. We report first detailed study permafrost this region, based on analysis cryostructure and distribution stable isotopes oxygen hydrogen, ion concentrations from ice‐rich cores two 3–7 m high. Their main cryostructures are reticulate lenticular, with visible ice contents exceeding 50–60%. The vertical lateral δ 18 О δD values show a step‐by‐step mechanism lithalsa...
The Duvanny Yar cross-section located in the Lower Kolyma River valley of Northern Yakutia (69°N, 158°E, height above level 55 m), has been studied and dated detail by radiocarbon. sequence mainly consists sandy loam sediments with large syngenetic ice wedges. Their width at top is 1–3.5 m. Allochthonous organic material occurs high content, concentrating as 0.5–0.7 m lenses. Shrub fragments, twigs, mammoth bones are accumulated peaty layers. Through interpolation based on a series 14 C...
ABSTRACT The recently formed Batagay mega-thaw slump exposes permafrost deposits to a depth of up 92 m below ground surface and provides insight into the climate record in region most severe continental Northern Hemisphere. Radiocarbon stable isotope data were obtained verify age ice wedges yedoma (upper Ice Complex local cryostratigraphy), deduce paleoclimate information. A millennial-scale resolution paleotemperature from radiocarbon-dated spans Marine Isotope Stages (MIS) 3–2. mean...
Abstract Ice wedges are considered as a paleoarchive of winter air temperatures their stable isotope composition has been widely used to reconstruct climatic conditions in the Arctic regions. wedge records, obtained recent decades for many permafrost areas Russia and North America, demonstrate clear shift from lower higher values between Late Pleistocene Holocene (by 5–10‰ δ 18 O some regions Russian Arctic), which is accepted evidence temperature increase. However, evolution during less...
Abstract Ice‐wedge ice can provide a valuable record of past winter climate variability at high latitudes yet to date this proxy has been applied only sparsely across the Chukotka region Siberia. Here we present data from eight ice‐wedges four sites 600‐km transect in Eastern which use reconstruct regional Holocene paleotemperature. The age was established by radiocarbon dating peat surrounding individual ice‐wedges. Our suite ages suggests that studied formed between 12.9–11.8 and 3–2.5 cal...
Stable isotope composition of syngenetic and epigenetic ice wedges, radiocarbon age, pollen spectra the surrounding deposits were studied during long term investigations at "Belyi Klyuch" site on first (6–8 m height) terrace Chara River (720 m.a.s.l.) in northern Transbaikalia to assess climatic conditions ice-wedge formation. It was revealed that Holocene wedges had been formed from 10 7.5 ka 14C BP. The (δ18О, δ2H) relict is lightest amounts −23‰ −185‰, correspondingly. isotopic...
Six palsa mire in Usa River valley and Vorkuta area North-eastern part of European Russia were studied detail. In total 75 new 14 C dates from different sections obtained. near Bugry Settlement 3.2 m high dated 8.6 to 2.1 ka BP. The permafrost began low moor peat 2 3690 BP, heave at least 3700 A low-moor 2.5 indicates the change hydrological-mineral regime during 7.1 6.3 heaving commenced 6 number 8 5.6 2.7 BP obtained 3 palsa. Near Abez’ development about 2.8 There are both large smaller...
This study aims to analyze the stable isotope composition of snow cover Elbrus Mountain – highest mountain in Europe. Snow sampled middle accumulation period January 2017, February 2016, 2001 and during snowmelt July 1998 August 2009. at south slope Mt. different elevations, total altitude range is approximately 1700 m. A significant effect fresh precipitation was determined with gradient –1.3‰ δ18O/100 m (–11.1‰ δ2 H /100 m) 3100-3900 a.s.l. inverse 2016 +1.04‰ δ18O (+8.7‰ 3064-3836 There...