Wyniki wyszukiwania - BazTech

1

Application of ground penetrating radar to identification of thickness and structure of sediments in postglacial lakes, illustrated with an example of the Mały Staw lake (the Karkonosze Mountains)

Gądek B., Grabiec M., Kędzia S.

Studia Geomorphologica Carpatho-Balcanica

|

2015

|

Vol. 49

5--13

EN

This paper has been aimed at demonstrating the applicability of the ground penetrating radar to acquiring basic information on lake sediments and geomorphological conditions of their deposition in the basin of Mały Staw lake. The lake area is one of the most comprehensively studied part of the Polish part of the Karkonosze Mountains. The application of radar soundings enabled a fast and environmentally friendly verification as well as updating the results of previous research on the thickness and structure of the sediments of this glacial lake. Mały Staw lake is formed at the postglacial depression in the granite bedrock. The bottom of the lake is composed of limnic deposits of the maximum thickness reaching up to 15 m. The postglacial formations occurring below them probably contain a buried moraine of the youngest recessional phase. Solid rock is located about 25 meters beneath the current bottom of the lake.

2

Spatial relationship in interaction between glacier and permafrost in different mountainous environments of high and mid latitudes, based on GPR research

Dobinski W., Grabiec M., Gądek B.

Geological Quarterly

|

2011

|

Vol. 55, No. 4

375-388

EN

Ground penetrating radar (GPR) surveys were conducted on both the glaciers and their forefields in the Tatra Mountains, Northern Scandinavia and on Spitsbergen – between the 49 degrees and 77 degrees latitudes. The results show that the glacial and periglacial environments interpenetrate. Permafrost is present in the glacier, and glacial ice may occur in the periglacial environment. What is common for both the environments is the perennial melting point surface, with the temperature close to 0°C. In the glacier it is the boundary of the cold-temperate transition surface and on the forefield – permafrost base.

3

Zmienność temperatury u spodu sezonowej pokrywy śnieżnej w strefie sporadycznego występowania wieloletniej zmarzliny w Tatrach

Gądek B., Leszkiewicz J.

Landform Analysis

|

2008

|

Vol. 9

115--119

4

Struktura wewnętrzna Lodowczyka Mięguszowieckiego (Tatry) w świetle wyników badań georadarowych

Gądek B., Kotyrba A.

Przegląd Geologiczny

|

2003

|

Vol. 51, nr 12

1044-1047

PL

W pracy przedstawiono wyniki sondowania georadarowego Lodowczyka Mięguszowieckiego (Polskie Tatry) z zastosowaniem przetwornika antenowego o częstotliwości nośnej 500 MHz. Zarejestrowany obraz radarowy uwidocznił pełną strukturę wewnętrzną lodowczyka wraz z jego podłożem. Maksymalna grubość lodu wynosiła ok. 15 m. Spośród kilkudziesięciu stwierdzonych horyzontów refleksyjnych 10 najsilniejszych odpowiada prawdopodobnie lukom stratygraficznym. Ich ułożenie wskazuje na ruch rotacyjny. Udokumentowana struktura lodowczyka świadczy, że obecnie jest to forma będąca w fazie recesji - związana z warunkami klimatycznymi panującymi w Tatrach po Małej Epoce Lodowej.

EN

This paper presents results of detailed ground-penetrating radar (GPR) surveys at 500 MHz ofMięguszowiecki Glacieret in Polish Tatra Mountains. The recorded radar image shows a complete internal structure of the glacieret together with its substratum. The maximal thickness of the ice is about 15 m. Among the dozens of the reflection horizons recorded, the strongest 10 ones correspond probably with stratigraphic gaps. Their packing suggests rotational movement. The documented structure of the glacieret shows that this form is in the recession stage, what is associated with climatic conditions, which have prevailed in Tatra Mountains after the Little Ice Age.

5

Związek bilansu cieplnego i topnienia powierzchni Lodowczyka Mięguszowieckiego w Tatrach z temperaturą powietrza

Gądek B.

Przegląd Geofizyczny

|

2003

|

Z. 3-4

195-204

EN

This paper presents an attempt to determine the size of melting of the surface of Mięguszowiecki Glacieret in Polish Tatra Mountains basing on the heat balance of this surface. The obtained results confirm a strong relation between physical ablation of snow cover with air temperature. The size of snow melting should not be however determined basing on a permanent factor PDD. The linear regression equation is very useful, because it defines the relation of the ablation with daily air temperature. The parameters of these equations show temporal and spatial variability. The relation between the surface melting of Mięguszowiecki Glacieret and mean daily air temperature in July during cloudy and rainy weather is well defined by linear equations with the parameters: L = 0.411 and ,B = 2.808. The determination of L i B values representative for the whole ablation period requires to repeat measurements in Kocioł Mięguszowiecki in different weather conditions in the months May-October.