25 research outputs found
Chronology Of Isolation Of The Solovetskii Archipelago Lakes And Current Rates Of Lake Sedimentation
No full textISI Document Delivery No.: 019EC Times Cited: 1 Cited Reference Count: 15 Cited References: Aliev RA, 2007, J RADIOANAL NUCL CH, V274, P315, DOI 10.1007/s10967-007-1117-x Bakhmutov V. G., 1991, GEOMORFOLOGIYA, P52 Evzerov V. Ya., 2007, B COMMISSION STUDY Q, P54 Kolka VV, 2012, DOKL EARTH SCI, V442, P139, DOI 10.1134/S1028334X12010151 Larsen E, 2006, BOREAS, V35, P394, DOI 10.1080/03009480600781958 Lisitsyn A.P., 2010, WHITE SEA SYSTEM Proshkina-Lavrenko A.I., 1950, DIATOM ANAL Reimer PJ, 2004, RADIOCARBON, V46, P1029 Routh J, 2007, J PALEOLIMNOL, V37, P529, DOI 10.1007/s10933-006-9032-7 Shvartsman Yu.G., 2007, NATURAL ENV SOLOVETS STABELL B, 1985, BOREAS, V14, P273 Sternbeck J., 2001, WATER AIR SOIL POLL, V1, P151, DOI 10.1023/A:1017508322097 Subetto D. A., 2009, LAKE BOTTOM SEDIMENT van Beek P, 2010, J ENVIRON RADIOACTIV, V101, P521, DOI 10.1016/j.jenvrad.2009.12.002 Van Dam H, 1994, J AQUATIC ECOLOGY, V28, P117 Subetto, D. A. Shevchenko, V. P. Ludikova, A. V. Kuznetsov, D. D. Sapelko, T. V. Lisitsyn, A. P. Evzerov, V. Ya van Beek, P. Souhaut, M. Subetto, G. D. Russian Foundation for Basic Research [10-05-00651-a, 10-05-00412-a, 11-05-10043-k]; Norwegian Research Council [175937/S30]; grant "ANR Arctic Metals,"; Presidium of the Russian Academy of Sciences This work was supported by the Russian Foundation for Basic Research (project nos. 10-05-00651-a, 10-05-00412-a, 11-05-10043-k), the Norwegian Research Council (project no. 175937/S30, E. Larsen), grant "ANR Arctic Metals," and Program 21 of the Presidium of the Russian Academy of Sciences. 1 MAIK NAUKA/INTERPERIODICA/SPRINGER NEW YORK DOKL EARTH SC
NEW DATA ON BALTIC SEA RELATIVE LEVEL CHANGES DURING HOLOCENE WITHIN HOGLAND (SUURSAARI) ISLAND, GULF OF FINLAND
No full text126-12
NEW DATA ON BALTIC SEA RELATIVE LEVEL CHANGES DURING HOLOCENE WITHIN HOGLAND (SUURSAARI) ISLAND, GULF OF FINLAND
Get PDF126-12
Palaeoecological and Palaeoclimatical Reconstructions of Holocene According Chironomid Analysis of Lake Glubokoye Sediments
Get PDFThe distribution of late-Quaternary woody taxa in northern Eurasia: evidence from a new macrofossil database
No full textWe present a database of late-Quaternary plant macrofossil records for northern Eurasia (from 23° to 180°E and 46° to 76°N) comprising 281 localities, over 2300 samples and over 13,000 individual records. Samples are individually radiocarbon dated or are assigned ages via age models fitted to sequences of calibrated radiocarbon dates within a section. Tree species characteristic of modern northern forests (e.g. Picea, Larix, tree-Betula) are recorded at least intermittently from prior to the last glacial maximum (LGM), through the LGM and Lateglacial, to the Holocene, and some records locate trees close to the limits of the Scandinavian ice sheet, supporting the hypothesis that some taxa persisted in northern refugia during the last glacial cycle. Northern trees show differing spatio-temporal patterns across Siberia: deciduous trees were widespread in the Lateglacial, with individuals occurring across much of their contemporary ranges, while evergreen conifers expanded northwards to their range limits in the Holocene
Cold period in the Northern Europe in the past (about 8200 years ago): analysis of empirical data and possible causes
Get PDFCold 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
КОРОТКОПЕРИОДНЫЕ ИЗМЕНЕНИЯ КЛИМАТА НА СЕВЕРО-ЗАПАДЕ РОССИИ ЗА ПОСЛЕДНИЕ 2300 ЛЕТ И ИХ КОРРЕЛЯЦИЯ С ИЗМЕНЕНИЯМИ СОЛНЕЧНОЙ АКТИВНОСТИ
No full text
Палинологические реконструкции разрезов среднего и позднего голоцена побережья Баренцева моря
Get PDFOur 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
