Peculiarities of contemporary surface spore-pollen spectra from southern Siberia (Tyva and Khakassia republics)

In mountains and in intermountain depressions in the south of Western Siberia 31 contemporary (subrecent) spore-pollen spectra were collected with aim to reveal how adequate the composition of spore-pollen spectra reflects vegetation types in study area. It was found that pollen spectra from dry steppe of Tyva are characterized by dominance of Artemisia and Chenopodiaceae pollen, but more north located steppe of Khakassia – by abundance of Poaceae pollen among herbs and by considerable amount of tree pollen, mostly Betula and Pinus sylvestris. A high mountain spore-pollen spectra in Tyva are differed by dominance of Poaceae pollen and increased amount of Cyperaceae pollen with small amount of tree pollen. Spore-pollen spectra of mountain taiga are dominated by tree pollen of Pinus sibirica. Spectra with relic composition combining abundance of Artemisia pollen with increased amount of Picea and Larix pollen were found on the tops of Tannu-Ola ridge in south Tyva. The described features of modern spore-pollen spectra reflect real peculiarities of vegetation in places were these samples were collected including larch-spruce forest alternated with steppe parches on tops of Tannu-Ola ridge. Mathematical method of unconstrained cluster analysis fully conforms the grouping of modern pollen spectra according to vegetation types and hence supports the idea that spore-pollen spectra from mountain areas reflect accurately the vegetation types and composition of local plant communities

The dependence of tree pollen production on the weather conditions in the south of West Siberia

In the present study, we have investigated the dependence of the composition of the modern spore and pollen spectra on the composition of the vegetation cover in the southern part of Western Siberia (south of the Tomsk region) using the Tauber traps. We also found out the correlation between the spore and pollen spectra and the weather conditions of the year under study

The Eurasian Modern Pollen Database (EMPD), version 2

The Eurasian (née European) Modern Pollen Database (EMPD) was established in 2013 to provide a public database of high-quality modern pollen surface samples to help support studies of past climate, land cover, and land use using fossil pollen. The EMPD is part of, and complementary to, the European Pollen Database (EPD) which contains data on fossil pollen found in Late Quaternary sedimentary archives throughout the Eurasian region. The EPD is in turn part of the rapidly growing Neotoma database, which is now the primary home for global palaeoecological data. This paper describes version 2 of the EMPD in which the number of samples held in the database has been increased by 60 % from 4826 to 8134. Much of the improvement in data coverage has come from northern Asia, and the database has consequently been renamed the Eurasian Modern Pollen Database to reflect this geographical enlargement. The EMPD can be viewed online using a dedicated map-based viewer at https://empd2.github.io and downloaded in a variety of file formats at https://doi.pangaea.de/10.1594/PANGAEA.909130 (Chevalier et al., 2019)Swiss National Science Foundation | Ref. 200021_16959

The Eurasian Modern Pollen Database (EMPD), version 2

The Eurasian (nee European) Modern Pollen Database (EMPD) was established in 2013 to provide a public database of high-quality modern pollen surface samples to help support studies of past climate, land cover, and land use using fossil pollen. The EMPD is part of, and complementary to, the European Pollen Database (EPD) which contains data on fossil pollen found in Late Quaternary sedimentary archives throughout the Eurasian region. The EPD is in turn part of the rapidly growing Neotoma database, which is now the primary home for global palaeoecological data. This paper describes version 2 of the EMPD in which the number of samples held in the database has been increased by 60% from 4826 to 8134. Much of the improvement in data coverage has come from northern Asia, and the database has consequently been renamed the Eurasian Modern Pollen Database to reflect this geographical enlargement. The EMPD can be viewed online using a dedicated map-based viewer at https://empd2.github.io and downloaded in a variety of file formats at https://doi.pangaea.de/10.1594/PANGAEA.909130 (Chevalier et al., 2019).Peer reviewe

The Reading Palaeofire Database : an expanded global resource to document changes in fire regimes from sedimentary charcoal records

Sedimentary charcoal records are widely used to reconstruct regional changes in fire regimes through time in the geological past. Existing global compilations are not geographically comprehensive and do not provide consistent metadata for all sites. Furthermore, the age models provided for these records are not harmonised and many are based on older calibrations of the radiocarbon ages. These issues limit the use of existing compilations for research into past fire regimes. Here, we present an expanded database of charcoal records, accompanied by new age models based on recalibration of radiocarbon ages using IntCal20 and Bayesian age-modelling software. We document the structure and contents of the database, the construction of the age models, and the quality control measures applied. We also record the expansion of geographical coverage relative to previous charcoal compilations and the expansion of metadata that can be used to inform analyses. This first version of the Reading Palaeofire Database contains 1676 records (entities) from 1480 sites worldwide. The database (RPDv1b - Harrison et al., 2021) is available at https://doi.org/10.17864/1947.000345.Peer reviewe

The Eurasian Modern Pollen Database (EMPD), version 2

Abstract. The Eurasian (née European) Modern Pollen Database (EMPD) was established in 2013 to provide a public database of high-quality modern pollen surface samples to help support studies of past climate, land cover, and land use using fossil pollen. The EMPD is part of, and complementary to, the European Pollen Database (EPD) which contains data on fossil pollen found in Late Quaternary sedimentary archives throughout the Eurasian region. The EPD is in turn part of the rapidly growing Neotoma database, which is now the primary home for global palaeoecological data. This paper describes version 2 of the EMPD in which the number of samples held in the database has been increased by 60 % from 4826 to 8134. Much of the improvement in data coverage has come from northern Asia, and the database has consequently been renamed the Eurasian Modern Pollen Database to reflect this geographical enlargement. The EMPD can be viewed online using a dedicated map-based viewer at https://empd2.github.io and downloaded in a variety of file formats at https://doi.pangaea.de/10.1594/PANGAEA.909130 (Chevalier et al., 2019).</jats:p

The Reading Palaeofire Database: an expanded global resource to document changes in fire regimes from sedimentary charcoal records

Sedimentary charcoal records are widely used to reconstruct regional changes in fire regimes through time in the geological past. Existing global compilations are not geographically comprehensive and do not provide consistent metadata for all sites. Furthermore, the age models provided for these records are not harmonised and many are based on older calibrations of the radiocarbon ages. These issues limit the use of existing compilations for research into past fire regimes. Here, we present an expanded database of charcoal records, accompanied by new age models based on recalibration of radiocarbon ages using IntCal20 and Bayesian age-modelling software. We document the structure and contents of the database, the construction of the age models, and the quality control measures applied. We also record the expansion of geographical coverage relative to previous charcoal compilations and the expansion of metadata that can be used to inform analyses. This first version of the Reading Palaeofire Database contains 1676 records (entities) from 1480 sites worldwide. The database (RPDv1b – Harrison et al., 2021) is available at https://doi.org/10.17864/1947.000345

Western Siberia, a review of Holocene climatic changes

This article generalizes published palaeoecological and palaeoclimatic data based on pollen and other proxy data for Holocene of Western Siberia and describes the most significant palaeoreconstructions and hypothesis in explanation of past climatic changes in Western Siberia, although it does not pretend on overall review of all palaeopalynological data available for this region

Western Siberia, a review of Holocene climatic changes

This article generalizes published palaeoecological and palaeoclimatic data based on pollen and other proxy data for Holocene of Western Siberia and describes the most significant palaeoreconstructions and hypothesis in explanation of past climatic changes in Western Siberia, although it does not pretend on overall review of all palaeopalynological data available for this region

The Third International Conference LIMPACX, devoted to Investigation of Holocene Lake’s Sediments, Chandigarh (India), 5-8 of March 2009 yr.

Обзорная статья по материалам конференции освещает современное состояние дел в вопросах изучения изменений климата и ландшафтов Евразии в послеледниковое время с помощью разнообразных палеолимнологических методов, анализа слоев спелеотерм и древесно- кольцевых серий традиционными и новейшими палеогеографическими методами.Survey article based on materials of 3rd LIMPACS (IGVP, PAGES) conference represents modern state of art in the field of investigation of change of climate and landscapes in Eurasia in post Glacial time with use of different palaeolimnological proxies, stable isotope analyses of speleotherms and dendrokhronological data