Wyniki wyszukiwania - Biblioteka Nauki

1

Co znajduje się na dnie mórz i oceanów?

100%

Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2007

|

tom R. 12, nr 1

28-31

2

"Paleotermometry" oceanu

100%

Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2007

|

tom R. 12, nr 5

14-16

PL

Nauka o historii oceanów, opierająca się głównie na badaniu ich osadów, nosi nazwę paleoceanografii. Do jej najbardziej fundamentalnych problemów należy określenie zmian temperatury wód oceanicznych w przeszłości. Oceany są bowiem jednym z najważniejszych czynników kształtujących klimat na naszej planecie i poznanie zmian ich stanu termicznego jest podstawą rozważań o zmianach klimatycznych w przeszłości. Z kolei bez nich, daremne by były wszelkie próby przewidzenia przyszłych warunków klimatycznych.

3

Fala tsunami z 26 grudnia 2004 roku

100%

Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2005

|

tom R. 10, nr 6

6-10

4

Nowoczesne metody pomiaru przepływów i transportu zawiesin w rzekach i morzach

100%

Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2007

|

tom R. 12, nr 3

10-14

5

Osady tsunami - historia potężnych kataklizmów zapisana w piasku

100%

Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2006

|

tom R. 11, nr 1

10-13

6

O metodach określania współczesnej akumulacji osadów w morzach

100%

Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2007

|

tom R. 12, nr 2

12-14

7

Lodowce i klimat - część 2

63%

Rachlewicz G. , Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2008

|

tom R. 13, nr 4

27-32

8

Lodowce i klimat - część 1

63%

Rachlewicz G. , Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2008

|

tom R. 13, nr 3

20-24

9

O badaniach i wykorzystaniu minerałów ciężkich

63%

Jagodziński R. , Szczuciński W.

LAB Laboratoria, Aparatura, Badania

|

2008

|

tom R. 13, nr 2

18-22

PL

Skorupa ziemska jest zbudowana z mas skalnych, których składnikami są różnego typu minerały. Tych ostatnich znamy ponad 3000, te zaś tworzą kolejnych kilka tysięcy odmian. Istnieje szereg metod ich podziału -z uwzględnieniem składu chemicznego, budowy wewnętrznej, jak również możliwości praktycznego ich wykorzystania. Jednym z parametrów wykorzystywanych w praktyce do podziału minerałów jest ich ciężar właściwy. Wartości tej cechy mogą się wahać w szerokim zakresie - od 2,16 g/cm3 w przypadku halitu (NaCI), po ponad 19 g/cm3 dla złota rodzimego.

10

Report on the development of the Vistula river plume in the coastal waters of the Gulf of Gdańsk during the May 2010 flood

51%

Zajączkowski M. , Darecki M. , Szczuciński W.

Oceanologia

|

2010

|

tom No. 52 (2)

311-317

EN

The hydrological conditions, suspended matter concentrations and vertical particulate matter flux were measured as the River Vistula flood wave (maximum discharge) was flowing into the southern part of the Gulf of Gdańsk on 26 May 2010. Extending offshore for several tens of kilometres, the river plume was well stratified, with the upper layer flowing away from the shore and the near-bottom water coastwards.

11

Recent changes in sediment accumulation rates in Adventfjorden, Svalbard

51%

Zajączkowski M. , Szczuciński W. , Bojanowski R.

Oceanologia

|

2004

|

tom No. 46 (2)

217-231

EN

Recent sediment accumulation rates in Adventfjorden (Svalbard), a small subpolar fjord, were determined by 210Pb and 137Cs dating. Modern rates in the central basin decrease downfjord from 1.87 to 0.87 cm y-1 (2.6 to 1.19 g cm-2 y-1). Comparison of the modern values (1986-2001) with older ones (1963-86) reveals a marked increase in sediment accumulation rates in the last ten years. This correlates well with recent climate changes (warming and increase in precipitation). Comparison with particulate matter flux data indicates that a portion of the sediment is passed on to Isfjorden.

12

Sedimentary record of 2010 and 2011 Warta River seasonal floods in the region of Poznań, Poland

45%

Skolasińska K. , Szczuciński W. , Mitręga M. , Jagodziński R. , Lorenc S.

Geological Quarterly

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2015

|

tom Vol. 59, No. 1

47--60

EN

The Warta River near Poznań (West Poland) represents a meandering lowland river modified by hydro-engineering projects. Recently, two large floods occurred during the summer of 2010 and the winter of 2011. Rapid response surveys were conducted to document erosion and sedimentary records of the floods (spatial extent, grain size, composition, grain microtextures). Follow-up studies, which were conducted during the two years after the floods, assessed postdepositional changes in the flood deposits. A thick sand layer formed that ranged from an average of 10–15 cm (summer) to 30–35 cm (winter), building natural levees, side bars and crevasse splays. The sand layers consisted of fine- and medium-grained sands that were well-sorted, fine skewed and sourced from the river channel. The longer but smaller winter flood produced thicker and coarser deposits at different sites compared with the summer flood. An organic-rich mud layer and algal mats, which were short-existing, were also detected on the floodplain. The study proved that the flood record on engineered rivers may be only in the sand bodies near the river channel and their preservation is mainly controlled by their thickness. A single site may not record all floods, as particular events tend to leave deposits in various places.

13

Spatiotemporal changes in the concentration and composition of suspended particulate matter in front of Hansbreen, a tidewater glacier in Svalbard

38%

Moskalik M. , Ćwiąkała J. , Szczuciński W. , Dominiczak A. , Głowacki O. , Wojtysiak K. , Zagórski P.

Oceanologia

|

2018

|

tom No. 60 (4)

446--463

EN

Tidewater glaciers supply large amounts of suspended particulate matter (SPM) and freshwater to fjords and affect oceanographic, sedimentological and biological processes. Our understanding of these processes, is usually limited to the short summer season. Here, we present the results of a one-year-long monitoring of the spatial variability in SPM characteristics in a context of oceanographic and meteorological conditions of a glacial bay next to Hansbreen, a tidewater glacier in Hornsund (southern Spitsbergen). The observed range of SPM concentrations was similar to ranges measured in other sub-polar glaciated fjords, especially in Svalbard. The major source of SPM is the meltwater discharge from the glacier. The maximum water column-averaged SPM concentrations did not correlate with peaks in freshwater discharge and were observed at the beginning of the autumn season, when the fjord water transitioned from stratified to fully mixed. The observed spatiotemporal variations in the total SPM, particulate organic matter (POM) and particulate inorganic matter (PIM) are likely controlled by a combination of factors including freshwater supply, water stratification and circulation, bathymetry, the presence of sea ice, biological productivity and sediment resuspension. During the ablation season, the SPM maximum concentrations were located within the upper water layer, whereas during the winter and spring, the greatest amounts of SPM were concentrated in deeper part. Thus, typical remote sensing-based studies that focus on SPM distributions may not reflect the real SPM levels. POM and PIM concentrations were correlated with each other, during most of the time suggesting that they may have a common source.

14

Sedimentary evidence of extreme storm surge or tsunami events in the southern Baltic Sea (Rogowo area, NW Poland)

38%

Piotrowski A. , Szczuciński W. , Sydor P. , Kotrys B. , Rzodkiewicz M. , Krzymińska J.

Geological Quarterly

|

2017

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tom Vol. 61, No. 4

973--986

EN

The Baltic Sea is not typically considered as an area affected by tsunamis. However, during the Late Pleistocene and Holocene several tsunami events have been interpreted from the sedimentary record, mainly in Sweden and Estonia. Furthermore, on the southern coast of the Baltic Sea, there are historical accounts of catastrophical marine floodings called “der Seebär” (“the Sea Bear”). Their descriptions reveal many features typical for tsunami, but their genesis remained unknown and sedimentary evidence for such events has not been found. Here we provide evidence of sandy event layers from the area of Rogowo, NW Poland – the area of historical catastrophic storms as well as “der Seebär” events. The study area is a low-lying coastal plain with an average elevation of –0.5 to +0.5 m a.s.l., protected from the open sea by beach and coastal dune systems up to 5 m high. Sedimentological, micropalaeontological and geochemical analyses along with AMS 14C dating were applied to sedimentary successions seen in 5 major trenches and 198 sediment cores up to 1.5 m long. Two sandy layers were identified in the peat deposits that developed on the plain during the last ~2000 years. They reveal a number of typical features of tsunami deposits (significant lateral extent and thickness, rip-up clasts, chemical and micropalaeontological evidence of marine origin), however, 14C dating along with the historical accounts revealed that the major layer, extending at least 1.2 km from the modern coasts, was probably deposited by arguably the largest storm surge during the last 2000 years, which took place in 1497 AD. These storm deposits were likely formed during inundation of the low-lying coastal plain after major breaching of coastal dunes resulting in tsunami – like flow pattern and thus similar sedimentological effects. A discontinuous sand layer of younger age (18th century) and sharing similar properties to the previous one may be related to “der Seebär” event or another storm surge. The study revealed that the southern Baltic Sea coast may be affected by much greater coastal flooding than known from more recent accounts and observations. Thus, the presented geological record should be taken as an example of a worst-case scenario in coastal zone risk assessment from natural hazards. These events left sedimentary deposits that resemble tsunami deposits. It is likely that, in similar settings where storm surges cause unidirectional inundation of a coastal plain, it may not be possible to establish whether the resulting deposits were laid down from storms or tsunamis.