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Wyświetlanie 1-5 z 5
Tytuł:
Przyczyny i mechanizmy zmian klimatu w plejstocenie : state of art
The causes and mechanisms of climate change during the Pleistocene : the state of art
Autorzy:
Hrynowiecka, A.
Powiązania:
https://bibliotekanauki.pl/articles/2075566.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
zmiany klimatyczne
zmiany orbitalne
pokrywa lodowa
aktywność słoneczna
volatility of climate change
cyclicity of climate change
orbital forcing
formation of ice sheets
solar activity
Opis:
The reason of cyclic climate change during the Pleistocene is probably so-called Milankovitch cycles, consisting of three main orbital parameters of the Earth: the shape of Earth’s orbit eccentricity, axial tilt of Earth and precession – change in the direction of the Earth’s axis. They also impact on the insolation, which significantly contributes to the formation of ice sheets. The climate is conditioned largely by energy derived from the sun, dependent on the current solar activity. Specific configurations of these factors have contributed to the formation of glacial-interglacial cycles in the past; they have today and will have an impact on the climate of our planet in the future.
Źródło:
Przegląd Geologiczny; 2016, 64, 1; 26--34
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Older and Younger Holsteinian climate oscillations in the palaeobotanical record of the Brus profile (SE Poland)
Autorzy:
Hrynowiecka, A.
Pidek, I. A.
Powiązania:
https://bibliotekanauki.pl/articles/2060592.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
pollen analysis
macrofossil remains analysis
Mazovian Interglacial
Holsteinian Interglacial
palaeoecological reconstruction
climate reconstruction
Eastern Poland
Opis:
A pollen sequence of Holsteinian/Mazovian age known since the 1980s in Brus (Western Polesie) is the second site with a plant macrofossil record in eastern Poland. High sedimentation rates in a palaeolake that functioned in this area have allowed a detailed climate reconstruction that enabled to trace the Older and Younger Holsteinian oscillations and to outline the water-level changes in the water body. Climate reconstructions, based on full palaeobotanical analyses (pollen and macroremains), were compared with those from Nowiny Żukowskie (Lublin Upland), revealing regional climatic patterns. The two Holsteinian climate oscillations were correlated with those detected in the Dethlingen section of Germany (Koutsodendris et al., 2010), providing more information on the spatial scale of these events.
Źródło:
Geological Quarterly; 2017, 61, 4; 723--737
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zarys badań paleobotanicznych czwartorzędu na terenie Tatr, Pienin i Podhala
Overview of palaeobotanical investigations on the Quaternary in the Tatra Mts., Pieniny Mts. and Podhale region
Autorzy:
Hrynowiecka-Czmielewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2074703.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
badania paleobotaniczne
Tatry
Pieniny
Podhale
palynological investigations
Tatra Mts.
Pieniny Mts.
Podhale Region
Opis:
Palaeobotanical, mainly palynological, investigations, carried out in the Tatra Mts. and Podhale region made it possible to date organic sediments as well as to trace history of migration routes of several plant taxa, mainly trees. The results of pollen analyses allowed for the reconstruction of formation of individual vegetation belts in the Tatra Mts. The development of human settlements was traced on the basis of pollen analyses of the Podhale peat bogs. The decline of the last glaciations (Weichselian) and the Holocene are the best studied periods in this area, as far as palaeobotany is concerned. In the present overview most of earlier studies were taken into consideration.
Źródło:
Przegląd Geologiczny; 2009, 57, 8; 714-718
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quaternary environmental changes at Starunia palaeontological site and vicinity (Carpathian region, Ukraine) based on palaeobotanical studies
Autorzy:
Stachowicz-Rybka, R.
Granoszewski, W.
Hrynowiecka-Czmielewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/191546.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
pollen analysis
macroremains analysis
palaeoclimate
Pleistocene
Holocene
Starunia
Ukrainian Carpathians
Opis:
The unique nature of the Starunia palaeontological site, where nearly perfectly preserved large mammals were discovered at the beginning of the 20th century, and also the incompletely researched history of the Pleistocene vegetation of the region, provided the necessary stimulus to undertake further complex palaeobotanical investigations. The Pleistocene and Holocene sediments filling the Velyky Lukavets River valley are the object of this type of investigation. Both the succession of vegetation and radiocarbon dating indicate that the formation of biogenic sediments began in the Weichselian Middle Pleniglacial, in the Moershoofd interstadial, and lasted through the Hengelo/Denekamp Interstadial Complex and the Late Glacial and Holocene. Palaeobotanical investigations show the Middle Pleniglacial to have been characterized by an open, forestless landscape. Grassland steppe communities dominated with extremely high proportions of Poaceae, as well as Artemisia, Chenopodiaceae, and a number of herbaceous plant taxa. More moist places were occupied by dwarf shrub tundra with Betula nana, Alnus viridis, and Cyperaceae. Small changes in the character of the vegetation resulting from climatic oscillations made their mark through a slight increase in the proportion of tree-birches, fir and pine. The record of Late Weichselian plant succession in the Velyky Lukavets River valley also documents the dominance of open habitats with a preponderance of steppe and steppe-tundra communities and a dry, continental climate. Only with the beginning of the Holocene did an improvement in climate conditions lead to the rapid expansion of forest communities with a dominance of pine accompanied by fir, larch, and trees, which are more demanding in terms of temperature, e.g. elm, oak, lime, hornbeam and hazel.
Źródło:
Annales Societatis Geologorum Poloniae; 2009, 79, No 3; 279-288
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How to resolve Pleistocene stratigraphic problems by different methods? A case study from eastern Poland
Autorzy:
Terpiłowski, S.
Zieliński, T.
Kusiak, J.
Pidek, I.A.
Czubla, P.
Hrynowiecka, A.
Godlewska, A.
Zieliński, P.
Małek, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059725.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
chronostratigraphy
geochronology
interglacial meandering river
Pleistocene
Mazovian/Holsteinian
Eastern Poland
Opis:
Different methods have been used to determine the stratigraphic position of Pleistocene alluvial deposits, particularly fluvial interglacial deposits. Near-surface deposits of a meandering river, developed in point-bar and oxbow lake facies, in the Samica River valley (near Łuków, eastern Poland) have been investigated. The fossil valley is incised into the till plain and the outwash. The fluvial succession is locally overlain by solifluction deposits. All the deposits underwent sedimentological analysis. The petrographic composition of basal till occurring in the vicinity of a fossil valley was determined with the method of indicator erratics. Fluvial deposits were examined by pollen analysis and plant macrofossil analysis of oxbow lake facies. Absolute dating methods were applied to the deposits (thermoluminescence methods: TL and additionally IRSL). Lithological differences between fluvial and the surrounding glaciofluvial deposits were identified and their lithostratigraphic position assigned. Petrographic analysis of till and palaeobotanical analyses of oxbow lake facies gave compatible results. Fluvial deposits were formed after the Sanian 2/Elsterian Glaciation, during the Mazovian/Holsteinian Interglacial. Luminescence dating of the fluvial deposits by the TLMAX method yielded the most relevant results (412-445 ka), which indicate that these deposits were formed during the end of the MIS 12 and beginning of the MIS 11 stage.
Źródło:
Geological Quarterly; 2014, 58, 2; 235--250
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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