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Geografický časopis


Volume 58, 2006, No. 1

Content:


  Late pleistocene in the Vosges and the Krkonoše mountains: correlation of cosmogenic 10Be exposure ages
Régis Braucher 1), Jan Kalvoda 2), Didier Bourlès 3), Erik Brown 4), Zbyněk Engel 5), Jean-Luc Mercier 6)

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1)CEREGE, France.
2)Katedra fyzické geografie a geoekológie, Přírodovědecká fakulta Univerzity Karlovy, Albertov 6, 12 843 Praha. kalvoda@natur.cuni.cz
3)CEREGE, France.
4)Large Lake Observatory, University of Minnesota, Duluth, MN, USA.
5)Katedra fyzické geografie a geoekologie, Přírodovědecká fakulta Univerzity Karlovy, Albertov 6, 12 843 Praha.
6)Faculté de géographie, Université Louis Pasteur, Strasbourg, France.


Late Pleistocene deglaciation, 10Be exposure ages, the Vosges, the Krkonoše Mountains

The paper is focused on correlation of Late Pleistocene deglaciation of the Vosges in Eastern France and the Krkonoše Mountains in the Bohemian Massif through measurements of in situ-produced cosmogenic 10Be ages of glacial landforms. The minimum 10Be exposure ages of deglaciation after the last glacial expansion in the eastern flank of the Vosges range from 19.2 ± 2.09 ka to 5.11 ± 1.25 ka and in the Krkonoše Mountains from 27.17 ± 2.26 ka to 4.41 ± 0.52 ka. The results indicate a rapid retreat of glaciers in the Vosges at 10.2 ± 0.45 ka and they do not evidence of significant 10Be exposure ages variations with altitude. In the Krkonoše Mountains the most recent glacial expansion was completed before 13.81 ± 1.29 ka and 12.45 ± 1.68 ka respectively for the Labský důl Valley and the Obří důl Valley. Labský důl Valley deglaciation began on south facing slopes at 995 m a. s. l. 14.37 ± 1.37 ka ago, near terminal moraines at 820 m 13.81 ± 1.29 ka ago and reached the upper end of the cirque (1 275 m) at 10.3 ± 0.86 ka. In the Obří důl Valley cirque, the deglaciation started at 990 m around 12.45 ± 1.68 ka and was completed in the main cirque (1 180 m) at 9.58 ± 1.14 ka. The 10Be exposure ages of deglaciation for both the Vosges and the Krkonoše Mountains appears to be related to the Younger Dryas climate event.

Geografický časopis. Volume 58, 2006, No. 1: 3-14.

 
  Vnútorné migrácie na Slovensku: súčasné trendy a priestorové vzorce
Anton Bezák 1)

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1)Katedra regionálnej geografie, ochrany a plánovania krajiny, Prírodovedecká fakulta UK, Mlynská dolina 1, 842 15 Bratislava.


internal migration, functional urban regions, interregional migration flows, rural-urban migration, population redistribution, Slovakia

This paper provides some new insights into the changing pattern of internal migration in Slovakia during the 1996-2004 period based on anonymized migration data from current registration of population. After an extensive discussion of the data set and geographical frameworks used, the characteristic features of migration flows between the 66 functional urban regions are examined. Then, the analysis is turned to migration exchange between the urban and rural components of the settlement system revealing significant changes in migration directions. In the last section, the role of migration in the process of population redistribution is analysed and the main tendencies within and between functional urban regions are identified.

Geografický časopis. Volume 58, 2006, No. 1: 15-44.

 
  Modelovanie krajiny prostredníctvom polí
Milan Koreň 1)

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1)Katedra hospodárskej úpravy lesov a geodézie, Lesnícka fakulta Technickej univerzity vo Zvolene, T. G. Masaryka 24, 960 53 Zvolen.


geographic information systems, spatial models, field-based models, regionalization, area, boundary, overlay

The paper is focused on mathematical formalization of selected terms from the field of geography and landscape ecology. Developed mathematical formalism enables general problem description at the theoretical level, independently from the target computer system. For this purpose the field-based approach seems to be more appropriate than a classic object-based approach. The representation of selected concepts was developed by use of suitable mathematical structures: landscape (system), territory (two-dimensional interval), landscape property (function, field), regionalization (decomposition), area (continuous set). Spatial operations such as overlay of thematic layers, buffering and so on can be expressed at the abstract level by use of characteristic functions and distance operator. Duality between landscape properties (fields) and regionalization (decomposition) preserves the close relationship between object-based and field-based approaches.

Geografický časopis. Volume 58, 2006, No. 1: 45-60.

 
  Terminologické špecifiká a vybrané teoretické otázky regionálneho populačného prognózovania
Branislav Bleha 1)

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1)Univerzita Komenského v Bratislave, Prírodovedecká fakulta, Katedra humánnej geografie a demogeografie, Mlynská dolina, pavilón CH1-B1, 842 15 Bratislava. bleha@fns.uniba.sk


population forecast, regional population forecast, theoretical concept, relationships of disciplines, system of science

The paper deals with terminology and the theoretical concept of regional population forecasting. There are many questionable terms in this discipline. We show and clarify some of the terms, with unclear or confusing use in practice, such as forecast and projection, prediction and estimation, adjective population versus demographic projection. The second main aim of this study is to work out a simplified concept – model of the position of this discipline in the system of science. Since we distinguish differences between population forecasting and regional population forecasting, we try to indicate the mutual relationship schematically in the paper.

Geografický časopis. Volume 58, 2006, No. 1: 61-71.