scholarly journals The usefulness of subfossil Cladocera remains in Younger Dryas climatic reconstructions in central Poland

2017 ◽  
Vol 67 (4) ◽  
pp. 567-584 ◽  
Author(s):  
Dominik Pawłowski
Keyword(s):  
Climate Changes ◽  
Lacustrine Sediments ◽  
Younger Dryas ◽  
Oxbow Lakes ◽  
Central Poland ◽  
Cladocera Remains ◽  
Temperature Reconstructions ◽  
Two Phases ◽  
Study Sites ◽  
Geomorphological Features

Abstract Cladoceran-based paleotemperature estimates for the Younger Dryas for ten sections of paleo-oxbow lakes, valley mires, and lacustrine sediments from central Poland are presented, and their potential usefulness to climatostratigraphy is described. Most of the changes observed in the cladoceran assemblages are responses to climate changes. The cladoceran-based temperature reconstructions reflect cold conditions during the Younger Dryas (YD) and allow a division of this period into two phases: an older colder phase, between 12,800 and 12,000 cal yrs BP, and a younger, warmer phase, between ca. 12,000 and 11,500 cal yrs BP. The geomorphological features of the study sites and local environmental forces are also taken into consideration. The cladoceran-inferred summer temperature estimates from all of the study sites correspond closely with the available climate reconstruction for the YD in central Europe.

scholarly journals Early development of late Vistulian (Weichselian) lacustrine sediments in the Żabieniec swamp (central Poland)

2012 ◽  
Vol 39 (3) ◽  
pp. 197-211 ◽  
Author(s):  
Dominik Pawłowski
Keyword(s):  
Species Composition ◽  
Developmental Stages ◽  
Cold Water ◽  
Lacustrine Sediments ◽  
Radiometric Dating ◽  
Multivariate Statistical ◽  
Central Poland ◽  
Late Vistulian ◽  
Radiocarbon Data ◽  
Two Phases

AbstractThe early sedimentological and ecological developmental stages of a late Vistulian lake in the Żabieniec swamp near Łódź (central Poland) were analysed by radiometric dating, changes in the frequency of specimens and species composition of Cladocera and multivariate statistical analysis (DCA). The longevity of the lake resulted in a fairly complete sedimentary record from approximately 22 ka to 11 ka cal BP. Species composition and the variability in the frequency of Cladocera specimens has made it possible to distinguish eleven zones of their development, which are well correlated with radiocarbon data. The results were compared to those from other sites of north and central Europe. The initial Cladocera development comprises the richest and oldest late Vistulian Cladocera record in Europe. These cladoceran assemblages show that a deep, oligotrophic, moderately cold-water lake was present at the beginning. It appears that the cladoceran development was mainly due to climate change, but also to changes in locally prevailing conditions in the water body. The high frequency of cladocerans, as well as the presence of cladoceran taxa preferring warmer water, was noted before approximately 16 ka BP. The biota suggests that the Oldest Dryas cooling was not severe and fairly variable in terms of humidity and temperature. The changes in Cladocera composition give evidence of what is described as the Intra-Bølling Cold Oscillation. It is also concluded that the Bølling is represented by two phases in the Żabieniec lake sediments.

scholarly journals New insights into lake responses to rapid climate change: the Younger Dryas in Lake Gościąż, central Poland

Boreas ◽  
2020 ◽  
Author(s):  
Daniela Müller ◽  
Rik Tjallingii ◽  
Mateusz Płóciennik ◽  
Tomi P. Luoto ◽  
Bartosz Kotrys ◽  
...  
Keyword(s):  
Climate Change ◽  
Younger Dryas ◽  
Central Poland ◽  
Rapid Climate Change

scholarly journals Optical Stimulation Luminescence Dating of Deltas Revealed the Early to Mid-Holocene Lake-level Fluctuations of Daihai, Inner Mongolia, Northern China

2021 ◽  
Vol 9 ◽  
Author(s):  
Shixin Huang ◽  
Xi Chun
Keyword(s):  
Lake Level ◽  
Climate Changes ◽  
Asian Summer Monsoon ◽  
Regional Climate ◽  
Lacustrine Sediments ◽  
Northern China ◽  
Luminescence Dating ◽  
Lake Area ◽  
Monsoon Precipitation ◽  
Lake Level Fluctuations

Lake-level reconstruction of inland enclosed lakes especially for monsoon-sensitive areas is of great significance to reveal regional climate changes. Daihai, a typical enclosed lake at the marginal of the East Asian summer monsoon (EASM) area in north China, is sensitive to climate changes due to its unique regional characteristics. There were a series of lakeshore terraces, highstand lacustrine sediments, and braided river deltas, providing sufficient geomorphologic and stratigraphic evidence for the reconstruction of lake-level fluctuations of Daihai. Reconstructed lake-level variations during the early and mid-Holocene were constructed based on 22 quartz optical stimulated luminescence (OSL) ages from six well-preserved profiles around Daihai Basin. Our results indicated Daihai showed a relatively low level at 10.2 ka, and a gradually increasing lake level following the enhanced monsoon precipitation during the mid-Holocene. Specifically, the high lake level began to develop at 8.1 ka and reached the maximum at 5.2 ka, with ∼40 m higher than present. At this time, the lake area expanded to ∼400 km2, approximately six times as large as that of present, corresponding to the maximum monsoon precipitation and intensity of EASM during the mid-Holocene. However, our stratigraphic records showed a part of the depositional records in the north and east of the Daihai was missed after 5.2 ka, probably indicating a sudden drop of the Daihai lake level. These rapid level fluctuations were likely to be interpreted by some local scenarios and need to be further investigated in the future. Overall, the lake-level fluctuation of Daihai during the early and mid-Holocene was slightly different from that observed in the previously published regional records. Possibly, the interaction of the EASM and regional feedback from topography, and hydrology factors might have contributed to the spatial complexity and distinction.

A multiproxy study of Younger Dryas and Early Holocene climatic conditions from the Grabia River paleo-oxbow lake (central Poland)

2015 ◽  
Vol 438 ◽  
pp. 34-50 ◽  
Author(s):  
Dominik Pawłowski ◽  
Mateusz Płóciennik ◽  
Stephen J. Brooks ◽  
Tomi P. Luoto ◽  
Krystyna Milecka ◽  
...  
Keyword(s):  
Younger Dryas ◽  
Climatic Conditions ◽  
Early Holocene ◽  
Oxbow Lake ◽  
Central Poland

Oxygen-isotope geothermometers in lacustrine sediments: New insights through combined δ18O analyses of aquatic cellulose, authigenic calcite and biogenic silica in Lake Gościąż, central Poland

2010 ◽  
Vol 74 (10) ◽  
pp. 2957-2969 ◽  
Author(s):  
Kazimierz Rozanski ◽  
Monika A. Klisch ◽  
Przemyslaw Wachniew ◽  
Zbigniew Gorczyca ◽  
Tomasz Goslar ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Biogenic Silica ◽  
Lacustrine Sediments ◽  
Central Poland

scholarly journals Paleośrodowiskowe znaczenie zmian tempa i charakteru sedymentacji osadów jeziora Jelonek w Borach Tucholskich = Paleoenvironmental significance of changes in the rate and type of sedimentation in Lake Jelonek within Poland’s Tuchola Pine Forest (Bory Tucholskie)

2020 ◽  
Vol 92 (3) ◽  
pp. 409-422
Author(s):  
Mateusz Kramkowski
Keyword(s):  
Sedimentation Rate ◽  
Sediment Cores ◽  
Rapid Change ◽  
Lacustrine Sediments ◽  
Younger Dryas ◽  
Pine Forest ◽  
Radiocarbon Dates ◽  
The Holocene ◽  
The North ◽  
High Sedimentation

This paper presents the matter of the environmental reconstruction of laminated lacustrine sediments from the Younger Dryas through to the present day, in particular in respect of microlithofacial analysis and sedimentation rate. Lake Jelonek is located within the Tuchola Pine Forest of northern Poland (at 53°45’58N, 18°23’30E). It occupies a subglacial channel immediately adjacent to the Wda Valley. The lake covers 19.9 ha and has a maximum depth of 13.8 m. In 2014, overlapping sediment cores JEL14 (14.23 m) were collected from that deepest part, in order for a full sediment profile including the younger Dryas and the Holocene to be created. Most of the sediment is found to be laminated. Sedimentation rate was reconstructed for the lake, along with microlithofacial variability of different sections of the sediment. The results obtained were related to an age depth model based on 14 AMS radiocarbon dates, varve chronology and the Askja AD 1875 cryptotephra; and was correlated with pollen profiles. The Holocene sediment record of Lake Jelonek exhibits differences between low and high sedimentation rate intervals and varved and non-varved intervals. From the beginning of the Holocene through to the Subatlantic period, sedimentation proved to be a stable phenomenon. However, in the Subatlantic period, the average sedimentation rate increased to 7.7 mm per year from 2.2 mm, with maximum rates even reaching 15.3 mm/year. This period is reflected in a lack of lamination and the appearance of redeposited deposits. These changes prove particularly sensitive to local impact, with distinct alternations of low and high sedimentation rates and varved and non-varved intervals. The most probable drivers for the observed variability reflect a combination of changes of climate plus anthropogenic deforestation during periods of settlement that enhanced the sensitivity of the lake to wind stress. A summary of all analyses allowed for the identification of periods of rapid change in sedimentation, and – indirectly – for the reproduction of changes in the water level and anthropopressure in and around Lake Jelonek. Such results contribute to a better understanding of local influences on fluctuations in lake sedimentation processes characteristic for the north of Poland, but also Central Europe more widely.

scholarly journals DETECTION OF CHANGE IN DROUGHT FREQUENCY IN BYDGOSZCZ REGION, CENTRAL POLAND

2018 ◽  
Author(s):  
Renata KUŚMIEREK-TOMASZEWSKA ◽  
Stanisław DUDEK ◽  
Jacek ŻARSKI
Keyword(s):  
Climate Changes ◽  
Atmospheric Precipitation ◽  
Weather Conditions ◽  
Positive Trend ◽  
Drought Frequency ◽  
Significant Positive Trend ◽  
Central Poland ◽  
Ipcc Report ◽  
The University ◽  
Very High

The aim of the work, carried out within the framework of research on currently occurring rather than predicted climate changes, was to confirm or deny the hypothesis of increasing incidence of droughts in central Poland (the Bydgoszcz region) over the years 1986-2015. According to projections of climate change, the variability and extremity of weather conditions are expected to increase. In studies conducted under some climate scenarios, it was shown that atmospheric precipitation variability in central Poland will increase even to 20%, depending on the scenario. Some researches indicate that these changes are already taking place. The material was the data of precipitation measurements gained from weather station, located in a poorly urbanized area, at the Research Center of the University of Science and Technology. Totals of atmospheric precipitation in the 30-year period were analyzed (1986-2015). Dry periods in individual months, seasons, half-years and entire years were identified on the basis of the relative precipitation index (RPI). The precipitation totals in the years 1986-2015 were characterized by a very high temporal variability and thus increased the climatic risk of plants cultivation. The significant positive trend of precipitation totals was found only for the cold half-year, which is consistent with the projections of the IPCC report. The frequency of the occurrence dry months was 38.6%, of seasons 38.3%, half-years 35.0% and years 30.0%. There was noted no increasing frequency of dry periods with years; just to the contrary, a decreasing tendency was identified.

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