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    Wyświetlanie 1-5 z 5
    Tytuł:
    The granulometric properties of contemporary aeolian sands in a taiga - steppe area of Eastern Siberia
    Autorzy:
    Szczypek, T.
    Snytko, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/295186.pdf
    Data publikacji:
    2002
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    Eastern Siberia
    modern aeolian processes
    aeolian landforms
    aeolian sands
    Opis:
    The grain size distribution and quartz grain (1.0-0.8 mm) abrasion degree for the contemporary aeolian sands occurring in a zone of taiga and steppe in the neighbourhood of Lake Baikal, in Eastern Siberia, is compared with similar features in other aeolian sediments. Five sites in a taiga zone, one in a forest-steppe zone and one in a steppe zone have been investigated. Whereas the moipho-forming influence of the wind is obvious in the area investigated, the role of the wind is important only in respect of grain size distribution and is not an important factor in detemiining in quartz grain abrasion size.
    Źródło:
    Landform Analysis; 2002, 3; 47-61
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in quantitative parameters of active wind dunes on the south-east Baltic Sea coast during the last decade (Curonian Spit, Lithuania)
    Autorzy:
    Morkūnaitė, R.
    Bautrėnas, A.
    Česnulevičius, A.
    Dobrotin, N.
    Baubinienė, A.
    Jankauskaitė, M.
    Kalesnikas, A.
    Mačiulevičiūtė-Turlienė, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059357.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Curonian Spit
    aeolian processes
    coastal dunes
    penetrating radar
    GPR
    dynamics
    Opis:
    The Curonian Spit is one of the largest Holocene sand accumulation forms, stretching along the Baltic Sea coast and belonging to the Baltic sand belt. This article deals with the dynamics of the Curonian Spit dunes in the context of global climate change. Investigations were carried out in the environs of two high dunes (Parnidis Dune and Naglis Dune) over a period of 10 years (2003-2014). Levelling of cross-sections was performed using modern geodesic devices. Wind velocities and directions were measured at meteorological stations of Klaipeda and Nida. The wind regime (number of days with winds >15 m/s) was almost at the multiannual average during the study period. Sand moisture was measured in both dunes studied, and groundwater level was measured in the environs of the Naglis Dune by using ground penetrating radar (GPR). The Naglis Dune experienced a more significant lowering (by 4-6 m) compared with the Parnidis Dune over the study period, while sand deficit was greater in the Parnidis Dune (~10,000 m3). Compared with other European sand dune systems, the Curonian Spit dunes have undergone strong degradation. The article highlights possible degradation reasons and indicates the necessity of additional investigations. Only long-term investigations can contribute to disclosing the main processes both as natural background and due to anthropogenic activities, and the devising of protection measures.
    Źródło:
    Geological Quarterly; 2018, 62, 1; 38--47
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geographical research of the 30th Polish Antarctic Expedition at Arctowski Polish Station (King George Island, South Shetland Islands, Antarctica)
    Autorzy:
    Angiel, Piotr
    Mikulska, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/2029442.pdf
    Data publikacji:
    2008-06-01
    Wydawca:
    Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
    Tematy:
    Antarctica
    meteorological measurements
    geomorphological charting
    glacier retreat
    periglacial phenomena
    aeolian processes
    beach sediments
    sedimentological analysis
    Opis:
    This paper presents the scope of geographical research conducted at Arctowski Station during the 30th Polish Antarctic Expedition. The research included meteorological, climatological, geomorphological and glaciological issues. During the expedition, research was conducted on sandur sediments on the outwash plain of Sphinx Glacier, the size of the aeolian transport, intensity of periglacial phenomena, and the way in which environmental conditions are recorded on quartz grains collected on the Admiralty Bay beaches. Detailed measurements of the basic meteorological components were made, geomorphological maps of the outwash plains of Sphinx, Baranowski, and Windy Glaciers were also completed.
    Źródło:
    Miscellanea Geographica. Regional Studies on Development; 2008, 13; 51-56
    0867-6046
    2084-6118
    Pojawia się w:
    Miscellanea Geographica. Regional Studies on Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland
    Autorzy:
    Zieliński, P.
    Sokołowski, R. J.
    Fedorowicz, S.
    Woronko, B.
    Hołub, B.
    Jankowski, M.
    Kuc, M.
    Tracz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/94513.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    climate change
    periglacial environment
    fluvial processes
    aeolian processes
    luminescence dating
    zmiana klimatu
    środowisko peryglacjalne
    procesy fluwialne
    procesy eoliczne
    datowanie luminescencyjne
    Opis:
    Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.
    Źródło:
    Geologos; 2016, 22, 2; 105-120
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Depositional conditions of the Upper Younger Loess during the Last Glacial Maximum in central and eastern Europe
    Autorzy:
    Dzierżek, Jan
    Lindner, Leszek
    Chlebowski, Roman
    Szymanek, Marcin
    Bogucki, Andriy
    Tomeniuk, Olena
    Powiązania:
    https://bibliotekanauki.pl/articles/24024703.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    North European Loess Belt
    Vistulian glaciation
    aeolian processes
    palaeowind circulation
    heavy minerals
    północnoeuropejski pas lessowy
    zlodowacenie Wisły
    procesy eoliczne
    minerały ciężkie
    Opis:
    This paper is a summary of the results of research on the accumulation conditions of the Upper Younger Loess (LMg) in Poland and Bug loess (bg) in Ukraine from the maximum stage (MIS 2) of the Vistulian (Weichselian) Glaciation in central and eastern Europe. These studies included an analysis of the morphological (topographic) situation of the loess cover, its grain size and heavy mineral composition, the preserved structures of loess sedimentation as well as mollusc and pollen analyses of this loess. They revealed that the accumulation of Upper Younger Loess (UYL) might have been more dependent on the prevailing moisture conditions than previously thought. These conditions could have been caused by cold air masses from an ice sheet and warm air masses from the Mediterranean Sea and Atlantic coming together in the Carpathians and the Holy Cross Mountains and favouring the formation of dust storms and precipitation. In this process, a loading of loess dust (formed from local rocks weathering in periglacial conditions) by atmospheric moisture particles was especially significant. The moist substrate not only favoured the periodic development of vegetation and molluscs but also enabled the interception of dust and the accumulation of an increasingly thick loess cover. Westerly and south-westerly winds predominated in the UYL as indicated by the topographic position of loess patches and the mineral composition of the studied loess. Periodically an increased air circulation from the east and northeast occurred.
    Źródło:
    Acta Geologica Polonica; 2022, 72, 4; 369--389
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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