Occurrence of slender naiad (Najas flexilis (Willd.) Rostk. & W. L. E. Schmidt) during the Eemian Interglacial – An example of a palaeolake from the Hieronimowo site, NE Poland

2018 ◽  
Vol 467 ◽  
pp. 117-130 ◽  
Author(s):  
Mirosława Kupryjanowicz ◽  
Magdalena Fiłoc ◽  
Daniela Czerniawska
Keyword(s):  
Ne Poland ◽  
Najas Flexilis ◽  
Eemian Interglacial

scholarly journals History of Development and Terrestrialization of Lake Starowlany in the Eemian Interglacial Based on Cladocera Analysis (Sokόłka Hills, Ne Poland)

2015 ◽  
Vol 32 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Monika Niska ◽  
Anna Kołodziej
Keyword(s):  
Water Level ◽  
Water Levels ◽  
Trophic Levels ◽  
Depth Interval ◽  
The North ◽  
Ne Poland ◽  
Clayey Silt ◽  
Glacial Cover ◽  
Mis 5E ◽  
Eemian Interglacial

Abstract This paper presents development of the paleolake Starowlany existing in the Eemian Interglacial (MIS 5e) in north - eastern Poland. The lake history is based on Cladocera analysis. The paleolake Starowlany is located in the central part of the Sokółka Hills, approximately 9 km north of the town of Sokółka in the North Podlasie Lowland. The sediments studied filled a southern part of a tunnel valley formed during the Warta Glaciation. The coring was carried out with a geological drilling and constituted a part of the frame work aimed at preparing the Sokółka sheet for the Detailed Geological Map of Poland in scale 1:50000. The core was 7 m long. Peaty silt, peats and organic silt were present at the depth of 4.0-6.6 m, under deluvial sands, tills and silt. Organic series was over lain by a clayey silt with no glacial cover. Cladocera analysis was conducted with 20 samples from a depth interval 6.6-4.1 m. Remains of 17 species of Cladocera were found, representing the families: Chydoridae, Sididae and Bosminidae. A vast majority of them were the littoral species. In the paleolake Starowlany four development zones were distinguished that reflected changes as regards temperature, trophic levels and changes of water level in the lake. The paleolake existed from the early until the middle Eemian. The high est water level and the most favorable conditions for zooplankton development occurred in zones SCZ I and II. The highest trophic level took place in SCZ III (middle Eemian). In the late Eemian the water level dropped and the paleolake was transformed into a wetland. At certain points, the higher water level enabled existence of a few Cladocera species. The reasons for disappearance of the paleolake Starowlany included a local decrease in ground water levels as well as morphometric and geological characteristics of the lake.

Problems of the Duration of the Eemian Interglacial in Europe North of the Alps

2002 ◽  
Vol 58 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Charles Turner
Keyword(s):  
Mediterranean Region ◽  
Temperate Forest ◽  
Western Europe ◽  
Laminated Sediment ◽  
Annually Laminated Sediment ◽  
The Alps ◽  
The Mediterranean ◽  
Eemian Interglacial

AbstractSuggestions that the duration of the Eemian interglacial was about 11,000 yr, based on annually laminated sediment sequences in Germany, have been challenged in favor of a much longer interval. However, biostratigraphic evidence demonstrates why the Eemian sequences at Grande Pile and Ribains cannot be reliably used for alignment with the marine sequence, as applied by Kukla et al. (2002, this issue) to estimate the duration of this interglacial. The long chronology they propose would imply not just coniferous but, for up to 5000 yr, fully temperate forest in central France coexisting with treeless heath and steppe tundra conditions in northwestern Europe, an unlikely climatic and ecological scenario. The proposal that the Eemian Interglacial in western Europe lasted for 17,000 or even 23,000 yr is rejected. A duration of no more than 13,000 yr is preferred, at least for sites north of the Alps and Pyrenees. The duration of temperate conditions in the Mediterranean region is less certain.

scholarly journals The environmental and cultural contexts of the late Iron Age and medieval settlement in the Mazurian Lake District, NE Poland: combined palaeobotanical and archaeological data

2014 ◽  
Vol 23 (4) ◽  
pp. 439-459 ◽  
Author(s):  
Agnieszka Wacnik ◽  
Mirosława Kupryjanowicz ◽  
Aldona Mueller-Bieniek ◽  
Maciej Karczewski ◽  
Katarzyna Cywa
Keyword(s):  
Iron Age ◽  
Lake District ◽  
Cultural Contexts ◽  
Archaeological Data ◽  
Ne Poland ◽  
Late Iron Age

scholarly journals PRELIMINARY RESULTS OF THE GEOPHYSICAL SURVEYS OF THE NETWORK OF DEFENCE SETTLEMENTS FROM THE BRONZE AGE BETWEEN THE BIEBRZA AND NAREW (NE POLAND)

2020 ◽  
Vol 6 (2) ◽  
pp. 57-64
Author(s):  
Krzysztof Żurek ◽  
◽  
Tomasz Kalicki ◽  
Paweł Przepióra ◽  
Marcin Frączek ◽  
...  
Keyword(s):  
Bronze Age ◽  
Preliminary Results ◽  
Ne Poland ◽  
Geophysical Surveys ◽  
The Bronze Age

scholarly journals Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores

2021 ◽  
Vol 17 (1) ◽  
pp. 317-330
Author(s):  
Andreas Plach ◽  
Bo M. Vinther ◽  
Kerim H. Nisancioglu ◽  
Sindhu Vudayagiri ◽  
Thomas Blunier
Keyword(s):  
High Surface ◽  
Ice Core ◽  
Ice Cores ◽  
Surface Elevation ◽  
Balance Model ◽  
Interglacial Period ◽  
Air Content ◽  
Climate Simulations ◽  
Surface Melt ◽  
Eemian Interglacial

Abstract. This study presents simulations of Greenland surface melt for the Eemian interglacial period (∼130 000 to 115 000 years ago) derived from regional climate simulations with a coupled surface energy balance model. Surface melt is of high relevance due to its potential effect on ice core observations, e.g., lowering the preserved total air content (TAC) used to infer past surface elevation. An investigation of surface melt is particularly interesting for warm periods with high surface melt, such as the Eemian interglacial period. Furthermore, Eemian ice is the deepest and most compressed ice preserved on Greenland, resulting in our inability to identify melt layers visually. Therefore, simulating Eemian melt rates and associated melt layers is beneficial to improve the reconstruction of past surface elevation. Estimated TAC, based on simulated melt during the Eemian, could explain the lower TAC observations. The simulations show Eemian surface melt at all deep Greenland ice core locations and an average of up to ∼30 melt days per year at Dye-3, corresponding to more than 600 mm water equivalent (w.e.) of annual melt. For higher ice sheet locations, between 60 and 150 mmw.e.yr-1 on average are simulated. At the summit of Greenland, this yields a refreezing ratio of more than 25 % of the annual accumulation. As a consequence, high melt rates during warm periods should be considered when interpreting Greenland TAC fluctuations as surface elevation changes. In addition to estimating the influence of melt on past TAC in ice cores, the simulated surface melt could potentially be used to identify coring locations where Greenland ice is best preserved.

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