Wyniki wyszukiwania - BazTech

1

Predominant processes of forming caves in the Polish part of High Tatra Mts

Twyrdy M

Geologia Sudetica

|

2014

|

Vol. 42

98--98

2

Zasięg i geometria powierzchni lodowca Białej Wody podczas maksimum ostatniego zlodowacenia w Tatrach Wysokich-odpowiedź na krytyczne uwagi

Makos M., Nowacki Ł.

Przegląd Geologiczny

|

2009

|

Vol. 57, nr 7

614-618

EN

This paper is an answer to the polemical article Critical remarks on reconstruction of surface geometry of glaciers in the Polish High Tatra Mts. by Jerzy Zasadni in current issue of Przegląd Geologiczny. The criticism concerns our paper on reconstruction of surface geometry of the last glacial maximum (LGM) glaciers in the Polish High Tatra Mts. (drainage basins of Roztoka and Rybi Potok), published in Przegląd Geologiczny vol. 57, no 1, 2009. The main objections of our opponent concern on our reconstruction of equilibrium line altitude (ELA), ice surface geometry and paleoclimatic interpretations.We present a new reconstruction of ice surface geometry within the drainage basin of BiałaWoda during the last glacial maximum (LGM), including the part of a glacier previously omitted. The model of the glacier was made on the basis of detailed field mapping of glacial trimlines and analysis of digital elevation model (DEM) of the BiałaWoda Valley. The glacier surface area was found to be 37,61 km2. We found ELA value for AAR = 0,67 to be consistent with previously calculated average ELA value of 1430 m a.s.l. for AAR = 0.4, 0.45 and 0.5. In turn, some uncertainties concerning ice surface geometry in ablation area may be best explained as due to inaccuracy of geomorphological data, whereas the well-established ice surface elevation within accumulation area does not show any theoretical errors.We also show that glaciological parameters (t values along the glacier profile), questioned by our opponent, are consistent with glaciological conformities.We want to admit that paleoclimatic interpretations of paleocirculation presented in the ,previous paper was rather untimely.

3

Krytyczne uwagi na temat rekonstrukcji geometrii powierzchni lodowców w polskich Tatrach Wysokich

Zasadni J.

Przegląd Geologiczny

|

2009

|

Vol. 57, nr 7

607-613

EN

The paper presents critical remarks on reconstruction by Makos and Nowacki (2009). The authors worked out a model of ice-surface geometry and equilibrium line altitude (ELA) of glacier which existed in the Białka Valley system (High Tatra Mts.) during the Last Glacial Maximum (LGM), utilizing mapped trimlines in accumulation areas and literature data about glacier extent in ablation areas. Some palaeoclimate implications from this study indicate LGM-modern temperature amplitude ca 5.5grade C from ELA depression and prevailing southern atmospheric circulation pattern during the LGM in the Tatra Mts. The reconstruction does not comprise the whole former glacier system of the valley and therefore the use of arbitrary assumed accumulation area ratio (AAR) resulted in considerable error in determinations of ELA. It is concluded that ELA calculated for 1400 m a.s.l. was obtained with AAR 0.77 value instead of intended 0.65–0.67. Critical remarks also concern ice-surface geometry which is in some places inconsistent with glaciological conformities. The LGM modern temperature amplitude was calculated without considering precipitation changes between LGM and modern time and on the basis of questionable position of modern ELA position, therefore it can not be treated as a valuable one. Similarly, the thesis about southern atmospheric circulation is here discussed in detail. It is concluded that the evidences presented by Makos and Nowacki (2009) can not support nor contradict this thesis. It should be treaded as a speculation made under the influence of Alpine results.

4

Bioparameters of selected herb species in High Tatra Mts. spruce ecosystems

Kukla J., Kovacova M., Schieber B.

Polish Journal of Ecology

|

2003

|

Vol. 51, nr 3

369-376

EN

Bioparameters of selected herb species were studied on five control (undamaged) and five bark beetles damaged parallel plots established in form of two vertical transects in the spruce ecosystems of Bielovodska valley (High Tatra Mts.). The most abundant life forms in the studied phytocoenoses were hemicryptophytes (65%), the least abundant geophytes (5%). According to significance of differences in the average length of shoots the sensitivity of herb species to different ecological conditions and calamitous changes of the spruce stands density is a follows: Homogyne alpina > Luzula sylvatica = Dryopteris dilatata > Oxalis acetosella. According to significance of differences in energy content the sensitivity of species was following: Luzula sylvatica > Oxalis acetosella > Dryopteris dilatata > Homogyne alpina > Vaccinum myrtillus. However, the mean values calculated for undamaged and for damaged plots were significantly different (P<0.05) only in the case of weight of Luzula sylvatica shoots.

5

210 Pb dating of young holocene sediments in High-mountains lakes of the Tatra Mountains

Kotarba A., Łokas E., Wachniew P.

Geochronometria

|

2002

|

Vol. 21

73-77

EN

Topmost sediments in two oligotrophic lakes of the High Tatra Mountains were studied in terms of sedimentological characteristics and 210 Pb dating. An alpine lake sediments are important source of information on geomorphic process activity in glacial catchments. Two different sediment transfer models are represented. In Morskie Oko lake basin majority of extreme, short lasting geomorphic events triggered on the surrounding slopes are registred in lake sediments (minerogenic laminae), while in Zelene Pleso lake only an effect of pro-longed flooding periods are to be seen. The sedimentation rates in both lakes are similar.