NEW DATA ON BALTIC SEA RELATIVE LEVEL CHANGES DURING HOLOCENE WITHIN HOGLAND (SUURSAARI) ISLAND, GULF OF FINLAND

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Human-environment interaction during the Holocene along the shoreline of the Ancient Lake Ladoga: A case study based on palaeoecological and archaeological material from the Karelian Isthmus, Russia

This paper presents the results of pollen, diatom, charcoal, and sediment analyses from Lake Bol'shoye Zavetnoye, situated between the Gulf of Finland and Lake Ladoga on the Karelian Isthmus, north-western Russia. The main goal is to contribute to the discussion of Neolithic land use in north-eastern Europe. The article aims to answer questions related to Stone Age hunter-gatherer economy, ecology, and anthropogenic environmental impact through a comprehensive combination of multiple types of palaeoecological data and archaeological material. According to diatom data, Lake Bol'shoye Zavetnoye was influenced by the water level oscillations of Ancient Lake Ladoga during much of the Holocene. Intensified human activity and prolonged human occupation become visible in the Lake Bol'shoye Zavetnoye pollen data between 4480 BC and 3250 BC. During the final centuries of the Stone Age, a new phase of land use began, as several anthropogenic indicators, such asTriticum, Cannabis, andPlantago lanceolataappear in the pollen data and a decrease inPinusvalues is recorded. In general, the results indicate that socio-cultural transformations could have taken place already from the mid-5th millennium BC onwards, including new ways of utilizing the environment, perhaps also in the field of subsistence, even though the livelihood was based on foraging throughout the period

In search for fingerprints of an extraterrestrial event: Trace element characteristics of sediments from the lake Medvedevskoye (Karelian Isthmus, Russia)

Concentration and distribution of trace elements across the sequence of the Late Pleistocene sediments from the lake Medvedevskoye suggest the addition of materials other than those from a common source for the lake sediments of the region. The sediments of the lake Medvedevskoye carry some geochemical fingerprints which could be related the ET event that occurred at ca. 12.9 ka. Because such fingerprints are extremely subtle, the NW Russia can be considered to be the most remote eastern region of the extent of the Late Pleistocene airborne ET material. The sediments of the lake Medvedevskoye can also contain volcanic material from the eruption of the Laacher See (Germany) volcano and probably from other Late Pleistocene volcanoes of Western Europe and/or Iceland. © 2014 Pleiades Publishing, Ltd

Палинологические реконструкции разрезов среднего и позднего голоцена побережья Баренцева моря

Our research presents new pollen data about the last stages of the Holocene. The data show vegetation changes in the transition of the Subboreal and Subatlantic periods in theBarents Seacoast, caused by the fall in temperatures. We retrieved pollen data from different genesis sites; therefore we can reconstruct not only local, but also regional vegetation. Around 3000–2500 years ago on the region was spread forest-tundra vegetation associated with the relatively warm period. Around 2500–2000 years ago was spread tundra vegetation associated with cold period. Pollen analysis is a very important key to the reconstruction of vegetation and climate change.В статье представлены новые палинологические данные о последних этапах голоцена. В работе характеризуются изменения растительности на границе суббореального и субатлантического периодов, вызванные похолоданием климата на побережье Баренцева моря. Мы получили результаты палинологического анализа из разрезов различного генезиса. Реконструкция растительности проведена не только на локальном, но и на региональном уровне. Около 3000–2500 лет назад, на территории рассматриваемого региона получила распространение лесотундровая растительность, связанная с относительно теплым периодом. Около 2500–2000 лет назад лесотундровая растительность сменилась тундровой, что было связано с похолоданием климата. Палинологический анализ является очень важным ключом к реконструкции растительности и изменения климата

Paleolimnological studies in Russian northern Eurasia: A review

© 2017, Pleiades Publishing, Ltd. This article presents a review of the current data on the level of paleolimnological knowledge about lakes in the Russian part of the northern Eurasia. The results of investigation of the northwestern European part of Russia as the best paleolimnologically studied sector of the Russian north is presented in detail. The conditions of lacustrine sedimentation at the boundary between the Late Pleistocene and Holocene and the role of different external factors in formation of their chemical composition, including active volcanic activity and possible large meteorite impacts, are also discussed. The results of major paleoclimatic and paleoecological reconstructions in northern Siberia are presented. Particular attention is given to the databases of abiotic and biotic parameters of lake ecosystems as an important basis for quantitative reconstructions of climatic and ecological changes in the Late Pleistocene and Holocene. Keywords: paleolimnology, lakes, bottom sediments, northern

Холодный эпизод около 8200 лет назад в Северной Европе: анализ эмпирических данных и возможных причин

Cold episode in Northern Europe happened about 8200 years ago was known for a relatively long time, mainly due to paleobotanical (palynological) data obtained from analysis of lake and peat sediments. Detailed analysis of ice cores from the Greenland holes GRIP, GISP2, and NGRIP with a time resolution of about 10 years made possible to refine the duration and characteristics of the time structure of this cold period. This cooling lasted for approximately 160 yr. Spore-pollen analysis of lake sediments in Northern Europe (Sweden, Finland, Denmark, Germany, the North and North-West of Russia) and deep-sea cores of the North Atlantic showed that the mean annual air temperature during the maximum stage of the cooling was reduced by 1–2 °C, and in some areas by more than 3 °C. The cold spread from the coast of the North Atlantic into the European continent and manifested itself mostly in Sweden, Finland, the Baltic States, and to a lesser extent in the North-West and West of the Russian Federation. In the central Russia and North of 70°N the cooling was weak or absent. The question about a nature of this cold event and other cold spells in Late Glaciation, known as the cold of the early, middle and late Dryas, is widely discussed in the scientific literature. Most of scientists accept a hypothesis proposed more than 20 years ago, that the reduction of air temperatures in regions immediately adjacent to the North Atlantic was caused by the large volume of melt water discharged into the ocean as a result of disintegration and melting of ice-sheets. Climate models that take into account these effects allow estimating a decrease in the air and sea surface temperature due to freshening (desalination) of the upper ocean layer, and this confirms that the greatest decrease in temperature should be observed in the regions directly adjacent to the ocean. The increase in global temperature over the last 30 years is estimated to be 0.8 ± 0.2 °C, which is already reflected in a noticeable increase in precipitation in high latitudes. In addition, the melting of mountain glaciers and sea ice in the Arctic basin promotes freshening of the upper ocean, and as a result of these processes one can expect a certain decrease in the air temperature in the high latitudes if the present-day climate warming will continue. On the basis of paleoclimatic data, it can be assumed that such a decrease in air temperature can be relatively small and occur only in areas directly adjacent to the North Atlantic.Уже более 20 лет в Северной Европе известен холодный эпизод около 8200 лет назад. Похолодание продолжалось около 160 лет, температуры воздуха снижались на 1–2 °С, а в отдельных районах – более чем на 3 °С. Предполагается, что снижение температур воздуха было связано с поступлением больших объёмов пресной воды в Северную Атлантику в результате распада и таяния ледников. Подобный механизм имеет прямое отношение к оценкам будущего климата при развитии современного глобального потепления. Поскольку таяние горных ледников и морских льдов в Полярном бассейне способствует опреснению верхнего слоя океана, при развитии потепления в районах, непосредственно прилегающих к Северной Атлантике, можно ожидать некоторого снижения температуры воздуха в высоких широтах

Палеоэкологическая характеристика побережья Баренцева моря в позднем голоцене на примере полуострова Средний

We received results of complex palaeoecological research at south-west Barents Sea coast. In Periayarvi 1 settlement (Sredniy Peninsula) discovered by V. Ya. Shumkin in 1994, archeological excavations of two house-structures were performed. We sampled the sequence in the house-structure 16 date to the Early Metal Age and we studied it with archaeological, palynological, geochemical and radiocarbon methods. The sequence in the house-structure 16 settlement include sand layers in the bottom, the upper part consists of slightly decomposed peat. The radiocarbon data obtained from the charcoal sample from the fireplace in the middle of the house-structure is 2920±70 C14 BP, which correlates with result of pollen analysis. According ac to pollen data, the sequence formation started at the first half of the Subboreal period during the spread of tundra vegetation and then vegetation changed to forest tundra while the climate was getting more comfortable for humans. At the Subatlantic period tundra recovers because of temperature drop. The landscape is getting similar to the modern one. According geochemical indications main functional zones of house-structure were distinguished, and that provides necessary information about main characteristics of living conditions. The complex of methods allows to date Periayarvi 1 settlement to the Early Metal Age. In the results we made reconstruction of palaeoenvironmental conditions in the Late Holocene at the Barents Sea coast.Получены результаты комплексных палеоэкологических исследований на юго-западном побережье Баренцева моря. На поселении Перяярви 1 (полуостров Средний), открытом В.Я. Шумкиным в 1994 г., проведены археологические раскопки двух жилищ. Разрез одного из жилищ эпохи раннего металла изучен с помощью археологического, палинологического, геохимического и радиоуглеродного методов, на основании чего проведена реконструкция природных условий в позднем голоцене на побережье Баренцева моря

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