Zur Frage Der Elektrotechnischen Klassifikation Des Klimas     

Miroslav Rychtera  Jarmila Reinhartová 《Studia Geophysica et Geodaetica》1960,4(4):389-403

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Size-resolved characterisation of organic compounds in atmospheric aerosols collected at Welgegund,South Africa     

Wanda Booyens  Pieter G. Van Zyl  Johan P. Beukes  Jose Ruiz-Jimenez  Matias Kopperi  Marja-Liisa Riekkola  Miroslav Josipovic  Andrew D. Venter  Kerneels Jaars  Lauri Laakso  Ville Vakkari  Markku Kulmala  Jacobus J. Pienaar 《Journal of Atmospheric Chemistry》2015,72(1):43-64

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Similarities of and differences between three mountain belts at the border of the pannonian basin due to the behaviour of the mohorovičić discontinuity     

Krešimir Čolić  Svetozar Petrović  Hans Sünkel  Miloslav Burda  Miroslav Bielik  Vincenc Vyskočil 《Studia Geophysica et Geodaetica》1994,38(2):131-139

Summary The Dinarides, the Eastern Alps and the Western Carpathians being situated at the borders of the Pannonian basin, are of very similar origin. Therefore, the results obtained in the investigation of correlations between Earth gravity field parameters (absolute geoid undulations, gravity anomalies), the surface topography and the shape of the Mohorovičić discontinuity, were compared. It was found that these three regions have the same basic characteristics, but also their own specific features. While the similarities follow clearly from these investigations, the found differences might partly be a consequence of non-uniformity and unmatched quality of data sets used for the three regions. A short version of this paper, entitled "Kindredness of three mountain belts at the border of the Pannonian basin — deduced from the behavior of the Mohorovičić discontinuity" was presented at the 7th International Symposium "Geodesy and Physics of the Earth", Potsdam, October 5–10, 1992 and published in the Proceedings. Presently a visiting professor at the Graz University of Technology, Institute for Theoretical Geodesy, Department for Physical Geodesy, Austria. Presently at the Berlin University of Technology, Germany, as an Alexander von Humboldt Foundation Research Fellow.  相似文献   

Graphic symbols and local identity: the case of use and perception of municipal emblems in the Liberec Region (Czechia)     

Miroslav Šifta 《Geografisk tidskrift / udgivet af Bestyrelsen for Det Kongelige danske geografiske selskab》2016,116(2):147-158

This paper analyses the role of graphic symbols in local representation and in the process of local identity formation. The extent of graphic symbols utilization by local development actors in the region, its importance for image formation of the locality (municipality) from the point of view of the local development actors and an assessment of the degree of identification with the municipal emblems among the local population are evaluated, based on the results of a corresponding survey targeted at municipal representatives. Municipal emblems tend to (and also should) have a local representative function. These should emphasize local specificity, uniqueness. Municipal emblems have a potential to play the role of connecting, mediating and activating factors also on a higher as well as a local level. Municipal emblems are still not used enough and in the right way by actors of municipality representations. These are often misunderstood and deemed unimportant for local development.  相似文献   

Rb-Sr isotopic composition of granites in the Western Krušné hory/Erzgebirge pluton,Central Europe: record of variations in source lithologies,mafic magma input and postmagmatic hydrothermal events     

David Dolejš  Jiří Bendl  Miroslav Štemprok 《Mineralogy and Petrology》2016,110(5):601-622

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Oscillations and Waves in Radio Source of Drifting Pulsation Structures     

Marian Karlický  Ján Rybák  Miroslav Bárta 《Solar physics》2018,293(4):62

Drifting pulsation structures (DPSs) are considered to be radio signatures of the plasmoids formed during magnetic reconnection in the impulsive phase of solar flares. In the present paper we analyze oscillations and waves in seven examples of drifting pulsation structures, observed by the 800?–?2000 MHz Ond?ejov Radiospectrograph. For their analysis we use a new type of oscillation maps, which give us much more information as regards processes in DPSs than that in previous analyses. Based on these oscillation maps, made from radio spectra by the wavelet technique, we recognized quasi-periodic oscillations with periods ranging from about 1 to 108 s in all studied DPSs. This strongly supports the idea that DPSs are generated during a fragmented magnetic reconnection. Phases of most the oscillations in DPSs, especially for the period around 1 s, are synchronized (“infinite” frequency drift) in the whole frequency range of DPSs. For longer periods in some DPSs we found that the phases of the oscillations drift with the frequency drift in the interval from ?17 to \(+287~\mbox{MHz}\,\mbox{s}^{-1}\). We propose that these drifting phases can be caused (a) by the fast or slow magnetosonic waves generated during the magnetic reconnection and propagating through the plasmoid, (b) by a quasi-periodic structure in the plasma inflowing to the reconnection forming a plasmoid, and (c) by a quasi-periodically varying reconnection rate in the X-point of the reconnection close to the plasmoid.  相似文献   

Comparative study of methods for WHPA delineation   总被引：3，自引：0，他引：3  

Paradis D  Martel R  Karanta G  Lefebvre R  Michaud Y  Therrien R  Nastev M 《Ground water》2007,45(2):158-167

Human activities, whether agricultural, industrial, commercial, or domestic, can contribute to ground water quality deterioration. In order to protect the ground water exploited by a production well, it is essential to develop a good knowledge of the flow system and to adequately delineate the area surrounding the well within which potential contamination sources should be managed. Many methods have been developed to delineate such a wellhead protection area (WHPA). The integration of more information on the geologic and hydrogeologic characteristics of the study area increases the precision of any given WHPA delineation method. From a practical point of view, the WHPA delineation methods allowing the simplest and least expensive integration of the available information should be favored. This paper presents a comparative study in which nine different WHPA delineation methods were applied to a well and a spring in an unconfined granular aquifer and to a well in a confined highly fractured rock aquifer. These methods range from simple approaches to complex computer models. Hydrogeological mapping and numerical modeling with MODFLOW-MODPATH were used as reference methods to respectively compare the delineation of the zone of contribution and the zone of travel obtained from the various WHPA methods. Although applied to simple ground water flow systems, these methods provided a relatively wide range of results. To allow a realistic delineation of the WHPA in aquifers of variable geometry, a WHPA delineation method should ensure a water balance and include observed or calculated regional flow characteristics.  相似文献   

Multi-model multi-analysis ensemble weather forecasting on the grid for the South Eastern Mediterranean Region     

Vassiliki Kotroni  Evangelos Floros  Konstantinos Lagouvardos  Goran Pejanovic  Luka Ilic  Momcilo Zivkovic 《Earth Science Informatics》2010,3(4):209-218

Weather forecasting is based on the use of numerical weather prediction (NWP) models that are able to perform the necessary calculations that describe/predict the major atmospheric processes. One common problem in weather forecasting derives from the uncertainty related to the chaotic behaviour of the atmosphere. A solution to that problem is to perform in addition to “deterministic” forecasts, “stochastic” forecasts that provide an estimate of the prediction skill. A computationally feasible approach towards this aim is to perform “ensemble forecasts”. Indeed, in the frame of SEE-GRID-SCI EU funded project a Regional scale Multi-model, Multi-analysis ensemble forecasting system (REFS) was built and ported on the Grid infrastructure. REFS is based on the use of four limited area models (namely BOLAM, MM5, ETA, and NMM) that are run using a multitude of initial and boundary conditions over the Mediterranean. This paper presents the tools and procedures followed for developing this application at a production level.  相似文献   

The evolution of Petrov lake and moraine dam rupture risk (Tien-Shan,Kyrgyzstan)     

Bohumír Janský  Zbyněk Engel  Miroslav Šobr  Vojtěch Beneš  Karel Špaček  Serguei Yerokhin 《Natural Hazards》2009,50(1):83-96

An interdisciplinary study of glacier-related hazards in the Petrov lake region (Ak-Shiirak Range, the Inner Tien-Shan, Kyrgyzstan) has been undertaken to identify potential dangers to the area. A cooperative effort from experts in the fields of hydrology, glaciology, geomorphology and geophysics has been employed in this study. For the hazard assessment, evolution of the Petrov glacier and lake was reconstructed using historical reports, aerial photographs and satellite images. Geomorphological mapping and geophysical soundings was applied to the lake territory and the moraine dam. This has identified potentially hazardous areas of the dam including subsurface drainage zones and cracks that could cause a sudden extremely high discharge. In the past three decades, the Petrov lake has doubled in size, while in recent years, its area has been increasing by more than 92,000 square metres per year. Although there is no evidence for an imminent outburst, the dramatic increase in the lake’s size emphasizes the importance of this study.  相似文献   

Urban field classification by “local climate zones” in a medium-sized Central European city: the case of Olomouc (Czech Republic)     

Michal Lehnert  Jan Geletič  Jan Husák  Miroslav Vysoudil 《Theoretical and Applied Climatology》2015,122(3-4):531-541

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