A.A. Velichko's research while affiliated with Russian Academy of Sciences and other places
What is this page?
This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
Publications (151)
In this paper we focus the attention on the micromorphology of the Late and Middle Pleistocene paleosols exposed in twelve loess-paleosol sequences sections in the central part of the East European Plain. Every studied paleosol complex known as Mesin (MIS 5), Kamenka (MIS 6 (8)-7 (9)), and Inzhavino (MIS 8 (10)-9 (11)) pedocomplexes (PCs) consists...
The loess-palaeosol deposits at the Beglitsa section in the East European Plain play an important role in the understanding of climate and environmental changes in Eurasia. However, the absence of absolute geochronology has restricted the interpretation of the loess sedimentation process and its relevance to palaeoenvironmental change. In this pape...
A reliable chronology is essentially critical for correlating loess records with other paleoenvironmental time series, as well as for continuing improvements in the reconstruction of paleoenvironment and paleoclimate changes. It is exactly that the scarcity of chronologies across the Sea of Azov has limited the interpretation of climatic and enviro...
The micro- and macromorphological studies performed on the loess-soil sequences in the south of the East European Plain permitted to identify and describe the type of soil-formation processes that took part in the development of interstadial and interglacial paleosols. Four paleosol complexes are distinctly identified within the limits of the studi...
The reconstruction of natural environments associated with the development and degradation of the Scandinavian Ice Sheet from the Mikulino Interglacial period to the Holocene is presented in this paper. A diagram showing the change of vegetation in the periglacial zone of the Ice Sheet during the last 130 ka had been constructed from the results of...
An integrated study of the loess–soil sequence in the coastal exposure near the settlement of Beglitsa (Rostov oblast) allowed us, for the first time, to reconstruct the landscape-climatic changes that occurred in the eastern Azov region over the course of the Late Pleistocene. In the south of the periglacial zone, considerable differences between...
The methods are considered to solve the problem of secure isolation of radioactive waste containing long-lived products of nuclear fuel processing with a half-life of tens of thousands years (plutonium etc.). The methodology of long-term projection of average annual surface air temperature and total precipitation is proposed. Taking into account th...
The structure of loess-soil sequences of the North-Eastern Azov region was studied in coastal outcrops and boreholes within four key areas of the terraces of different age. Based on the positions of paleosols in geological sections of interfluve areas, the palaeotopography during interglacial epochs of the last 500 ka was reconstructed. The analysi...
Paleotemp[erature maps for the Last Interglacial of the Northern Hemisphere
Based on the multi-proxy studies of the Rakushechny Yar section of the Don River floodplain (47°33’N, 40°40’E), the landscape and climate changes in the Lower Don steppe province during the Holocene were reconstructed. During the entire time-span characterized by this section (app. since 9 ka BP), the study area belonged to the steppe zone. The coo...
The Guidebook presents the morphological, micromorphological, chemical and physical characteristics of Late Pleistocene and Holocene soils of the Central Chernozemic zone (Kursk and Voronezh regions). The information on the modern environmental conditions of the Central Russian Upland is also provided. The environmental dynamics of the area are pre...
The loess-soil series structure of Melekino key area was studied in detail in the coastal outcrop and the drill profile. It is possible to reveal specific features of watershed morphodynamics in the Northern Azov region since the Muchkap time (MIS 13, ~ 470-500 kyr). The position of paleosols and textural features of deposits indicate leading role...
Herbaceous communities in forest ecosystems on the southern part of the Russian Plain appeared in the Middle Miocene (∼10 Ma BP). In the Late Miocene (∼7 Ma BP), feather-grass steppe associations appeared among them. In the time span of 2.7 to 2.1 Ma BP (i.e., in the Early Quaternary, according to the current chronostratigraphic scale), the steppe...
The quaternary chronology and distribution of glaciations through the last million years is described. The scheme of main paleogeographical events is based on multidisciplinary studies (geological, paleontological, palynological and paleopedological evidences). Succession of glaciations – Don (the maximum one), Dnieper (with Moscow Stage), and Vald...
On the basis of landscape-climatic reconstructions for warming periods in the past, likely scenarios of future global warming
have been developed for various warming levels that might be reached during the current century. The paleoanalogue of global
warming by 0.7–1°C is the Holocene climatic optimum (5.5–6 ka B.P.) and that by 1.7–2°C is the last...
The paper presents results of morphoscopic studies of quartz grains recovered from sands underlying surficial peat over the West Siberian Plain. The field materials were collected in the course of the Russian–American expedition in 1999–2001. The data obtained proved the existence of a vast area in West Siberia similar to cold deserts in appearance...
Large-scale climate fluctuations reflected in the alternation of glacial and interglacial epochs have resulted in structural
changes in the landscape shell. Differences in heat and moisture supply have accounted for specific features of soil-forming
processes, zonality structure, and the ratio of soil formation and sedimentation processes. The sequ...
Phytomass of terrestrial vegetation and soil humus are considered to be the most important sinks of carbon, and therefore their changes during glacial–interglacial macrocycle may influence considerably the carbon balance. Spatial reconstructions of paleovegetation and paleosols at the key intervals within the macrocycle, namely the Mikulino (Eemian...
tatyana MoroZoVa, Viktor seMenoV, svetlana tiMireVa. Institute of Geography, Russian Academy of Sciences, Moscow, Russia. stimireva@mail.ru Several high coastal section along the shore of the Taganrog Gulf expose sub-aqual sediments (fluviatile deposits of the ancient Don River origin and estuarine deposits of the Azov Sea), overlain by subaerial d...
Multidisciplinary geological and paleogeographical studies have demonstrated that the so-called humus strata in the deluvial apron of Kostenki-14 are paleosols of various origins. It has been shown that cryogenic deformations in the section were mainly caused by block displacements of the entire sequence rather than by solifluction. At the time cor...
Eastern Priazovie is one of the primary regions for identification of the succession of the Pleistocene landscape-climatic cycle within the limits of the arid zone of southern European Russia. Here in a number of sections of the high coasts of Taganrog Bay, sub� aqueous sedimentation (alluvial brought by the Don, estuary, and estuarymarine of the S...
The choice of adaptation ways depended considerably on social capabilities of prehistoric societies at different stage of anthropogenesis and material culture development. Studies performed on the East European Plain revealed essential features of systems of human adaptations at the Middle Paleolithic, Upper Paleolithic and later stages. The migrat...
Loess-palaeosol exposures along Taganrog Bay, Sea of Azov, in southern Russia, reveal a complex succession of Quaternary palaeoenvironments over the past 0.7 million years. The deposits overlie marine sediments of Tiraspolian (Cromerian) age. At the key section of Semibalki-1, four palaeosol complexes are identified within the series. The earliest...
The isotope composition of carbon and oxygen in humus and carbonates has been studied in the Pleistocene loess and soil of
the Russian Plain in order to reconstruct the paleoclimatic parameters during the time of their formation. It is established
that most of the buried soils were formed upon the mean annual temperature exceeding the modern temper...
The spatial-temporal landscape dynamics through the Eemian interglacial (including preceding and succeeding transitional phases) have been examined along a latitudinal transect (50–55 °N). Three Eemian pollen diagrams are presented. As follows from comparison of the data from Central and Eastern Europe, changes of environment and climate became mor...
Geochemical and palynological studies of lacustrine sediments from the standard Eemian-Early Weichselian profiles Gröbern, Neumark-Nord and Klinge (Germany, Central Europe) document at least two warming events during the transition from the Eemian to the Early Weichselian. The first pronounced warming phase takes place towards the very end of the E...
Ples is the key-section that represents the Mikulino (Eemian) interglaciation and early part of the Valdai (Weichselian) glacial epoch in the north-central Russia. Pollen profile of this section reflects spread of the broad-leaved forest dominated by Quercus, Ulmus, and Tilia with participation of Acer, Fraxinus and Carpinus in the optimum phase of...
A problem of interpretation of genesis of profiles of fossil soils (complexes) in which soils of different age and genesis are combines appeared some decades ago. Such formations were studies for the first time in loess-soil series of the Late Pleistocene in Desna river basin where in the base of Valday loesses Mezin polygenetic soil complex were p...
Multidisciplinary studies of two key sections (parastratotypes) of the loess–soil–glacial formation (Strelitsa and Sebryakovo-Mikhailovka sections) located in the central part of the East European Plain placed the Matuyama–Brunhes reversal well below the Lower Pleistocene till. The till attributed to the Don glaciation (maximum glaciation on the Ea...
Three key Quaternary loess/paleosol sections were examined in the Missouri Valley (Iowa), Eustis Ash Pit (Nebraska), and in the Wittsburg Quarry (Arkansas) to gain insights into the sedimentation, environment and climate change of the U.S. Midwest. Four loess units are present separated by three well-developed paleosols. Crowley's Ridge Loess (Oxyg...
Morphoscopy of sand grains from the Late Pleistocene loess–paleosol series exposed on the East European Plain along a longitudinal profile, from the southern limit of the Late Pleistocene ice sheet to the Azov Sea coasts is examined. The data presented refer to three main zones of the loess accumulation different in characteristics of the processes...
Quaternary loess/paleosol series and cryogenic phenomena within the East European Plain, Russia, are less studied near their northern limit than at their southern extents. The multi-disciplinary study of two loess/paleosol/cryogenic sections were carried out in the Moscow and Vladimir regions of Central European Russia, not far from the glacial lim...
Typical mammoth inhabited the East European Plain during the second half of the Late Pleistocene glaciation. Under conditions of extremely arid climate, periglacial, mostly open landscapes formed a vast hyperzone (cryohyperzone) that occupied the place of the modern tundra, forest and steppe zones. To assess the available foodstuffs for mammoth pro...
Data on changes in natural environment, including those of the authors, and the Early-Middle Pleistocene chronology of paleogeographic events in the East European Plain are analyzed. In the Early Pleistocene, there were four glaciations (Likova, Setun, Don, Okaian) and three interglacials (Akulovo, Okatovo, Muchkap). The latest Muchkap Interglacial...
The quaternary chronology and distribution of glaciations through the last million years is described. The scheme of main paleogeographical events is based on multidisciplinary studies (geological, paleontological, palynological and paleopedological evidences). Succession of glaciations - Don (the maximum one), Dnieper (with Moscow Stage), and Vald...
Tropical wetlands are thought to have been a major driver of early Holocene fluctuations in atmospheric methane, in part because high-latitude peatlands were not extensively developed in North America by ~11 ka, a period of peak methane concentration. However, the timing of peatland expansion in Russia, which contains nearly half of the world's pea...
The peatlands of the West Siberia Lowland (WSL) are of global significance owing to the massive carbon (C) stocks they hold (70 Pg C) and their location at the focus of both observed and predicted Arctic warming. Greater understanding of the potential warm-climate sensitivity of northern peatlands using paleoecological approaches is limited by past...
The development of extensive peatlands in the circumpolar subarctic and arctic zones produced immense alterations in edaphic conditions, hydrology, vegetation, animal forage and habitat conditions, human land-use potential, carbon storage and land-atmosphere fluxes of CO2 and CH4. There has been much speculation regarding the impact that circumpola...
The paleogeographic analog method has been applied to estimate future changes in the state of the main components of the environment on the East European Plain at three time intervals within the 21st century (the 2030s, 2050s, and 2080s). Two warm epochs of the past, the Holocene optimum (c.5.5 kyr BP) and the Mikulino (Eemian) interglacial optimum...
Interpolar methane gradient (IPG) data from ice cores suggest the “switching on” of a major Northern Hemisphere methane source
in the early Holocene. Extensive data from Russia's West Siberian Lowland show (i) explosive, widespread peatland establishment
between 11.5 and 9 thousand years ago, predating comparable development in North America and sy...
The peculiarities of spatial-temporal landscape dynamic through the Mikulino Eemian Interglaciation (including preceding and succeeding transitional phases) have been examined by collective of Russian and German researchers. Reconstructions of the vegetation cover along the latitudinal transect (50-55 N.L.) have been made on the base of high resolu...
Quantitative reconstructions of long-term climate changes were performed for the central East European Plain using paleobotanic, paleopedological, and paleocryological data for a number of sections, which were correlated to radiocarbon and OSL dating, paleontological and paleomagnetic data. The results obtained for the last four glacial-interglacia...
The Western Siberian lowlands (WSL) are the world's largest high-latitude wetland, and possess over 900,000 km2 of peatlands. The peatlands of the WSL are of major importance to high-latitude hydrology, carbon storage and environmental history. Analysis of the existing Russian data suggests that the mean depth of peat accumulation in the WSL is 256...
Optical dating of silt-sized potassium feldspar grains was found to be suitable for dating the formation of key loess units at two sites on the central east European Plain. Loess bracketing the Bryansk palaeosol yielded optical ages in agreement with the well-dated radiocarbon chronology when corrected for anomalous fading. Optical ages from loess...
The main climatic oscillations of the Lateglacial/Early Holocene (Allerød, Younger Dryas, and Preboreal) can be distinguished all over Eastern Europe and Siberia. Distribution of the main climatic indices in the Lateglacial/Early Holocene, from west to east in Northern Eurasia, shows that variations of the mean January temperature (tJano) were larg...
Permafrost-favorable climatic conditions for the 21st century as predicted by two coupled atmosphere-ocean general circulation models (ECHAM4/OPYC3 and HadCM3) were compared. The severity index [1] related to the air-frost index [2] was used to characterize the local climatic conditions favoring the formation of permafrost. Anthropogenic forcing sc...
In order to reconstruct the Late- and Postglacial vegetation history of the northwestern edge of Beringia, a sediment core was collected from a lake north of the present treeline along the lower Lena River of northeastern Siberia, and analysed for fossil pollen and stomates. In addition, fossil tree stumps were collected in the vicinity of the lake...
The paper deals with the Late Paleolithic man distribution over the East European Plain during the Late Pleistocene. The process of peopling is subdivided into several chronological stages. Environmental reconstructions being given for each of them. A composition of game mammal fauna ia analyzed for a few sites, together with structure of the settl...
The Studies of Galich Lake deposits were carried out within the frame of the project FKZ 03F13GUS of the German GeoForschungsZentrum Scientific Center. The research group includes specialists from Potsdam (Germany), Institute of geography RAS, Moscow State University and the Institute of Global Ecology RAS (Moscow, Russia), with financial support f...
The evaluated area and volume of ice sheets on the Earth during the Last Glacial Maximum (18-20 thousand years ago, oxygen isotope stage 2) are adjusted to the most recent data and our subglobal to global paleoglaciological reconstructions published between 1986 and 1997. In the West Eurasian Arctic sector (Svalbard and Franz Josef Land), the compe...
The phytomass (the biomass of terrestrial vegetation) is one of the main reservoirs of carbon, as carbon makes up approximately 0.45 of the phytomass by weight [Ajtay, G.L., Ketner, P., Duvigneaud, P., 1979. Terrestrial primary production and phytomass. In: Bolin, B., Degens, E.T., Kempe, S., Ketner, P. (Eds.), The Global Carbon Cycle, SCOPE 13, Wi...
The phytomass stored in terrestrial vegetation at 5.5, 18 and 125 Ka BP, representing the environmental extremes of the Late Quaternary, was estimated for the Russian Plain, excluding the northern coast and adjacent piedmont. The estimates are based on paleovegetation maps by Grichuk [Grichuk, V.P., 1982. Rastitel `nost' Evropy v pozdnem pleistotse...
The concentration of methane in the atmosphere has varied considerably during the last 125,000 years. Boreal wetlands represent one of the main sources of methane emissions into the atmosphere, the rate of which is largely controlled by climate. Changes in climate (mainly in the duration of the frost-free period) and in the extent of wetlands presu...
An integrated paleogeographical mapping has been developed as a part of evolutionary geographical studies. It consists essentially in construction of a series of spatial reconstructions for various landscape constituents that existed in the past using the same methodological approach (and legends as similar as possible) as that applied in small-sca...
The volume and size of the late glacial ice-sheets in the Northern Hemisphere has been estimated, based on geomorphic and chronostratigraphic data. Limited glacial extents during the late glacial maximum characterized both Arctic Canada and northern Eurasia, in contrast to the presence of the large Laurentide, Scandinavian and Devensian ice-sheets...
A lake sediment core from forest-tundra on the Taimyr Peninsula, Siberia, was analyzed for pollen and coniferous stomate content to reconstruct Holocene vegetation history. It had a basal age of 9200 yr BP. Larix stomates indicate L. sibirica trees were present at the site since before 9200 yr BP. Both low total pollen accumulation rates from ∼9200...
Paleogeographical reconstructions permit estimations of changes in methane emissions from boreal ecosystems in northern Eurasia during the Last Interglacial (about 125,000 years ago) and Holocene (5500-6000 years ago) climate optimums. The increase in the frost-free period and atmospheric precipitation during global warming positively affects metha...
Analysis of palynological successions has enabled reconstruction of climate variations throughout the Late Glacial and Holocene in the tundra and forest zones of northern Eurasia. Statistical analysis allows estimation of mean annual precipitation, and mean annual and July temperatures, based on palynological assemblages. Thus, the dynamic relation...