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9 results on '"Leziak, Kamil"'

2. The seasonal variability of the amount of global solar radiation reaching the ground in urban and rural areas on the example of Warsaw and Belsk

Author

Nelken Kinga and Leziak Kamil

Subjects
global solar radiation, clear days, cloudy days, warsaw, belsk, Geography (General), G1-922
Abstract

The aim of this paper is to determine the contemporary differences in the inflow of global solar radiation in Warsaw (urban station) and Belsk (rural station). The meteorological data used comprised daily sums of global solar radiation (in MJ•m−2) and the duration of sunshine (in hours) for the period 2008 2014. On clear days in spring and summer, the rural area receives more solar radiation in comparison to the urban area, whereas in autumn a reverse relationship occurs. On cloudy days in all seasons, the rural area receives more solar radiation than the urban area, and the relationship is the strongest in winter. Differences between urban and rural areas on cloudy days are smaller than those observed on clear days.

Published
2016
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8. Modelowanie dopływu promieniowania słonecznego do obszarów o urozmaiconej rzeźbie terenu w systemach informacji geograficznej

Author

Leziak, Kamil

Subjects
geographical information systems, irradiation, solar radiation, irradiance, computer models
Abstract

The inflow of solar radiation to the active surface is among the crucial factors determining its radiation balance and thus the climate conditions. Due to limited research and a multitude of surfaces, the determination of the spatial distribution of solar radiation on the basis of in situ research is hampered. Therefore actinometrical models are used to calculate the value of solar irradiance with reference to digital elevation models. Two actinometrical models were described: r.sun implemented in the GRASS GIS software and the Area Solar Radiation (ARS) provided in the ArcMap program, a part of the ArcGIS package. A digital elevation model of the East Carpathian Mountains in Romania was used as entry data for the above described models and a comparative analysis of the following characteristics was performed: total solar irradiance, direct irradiance, diffused irradiance and direct daylight duration. It was determined that despite the fact that both actinometrical models show different values of solar irradiance for the same area, they reflect similar spatial distributions. While both models are deemed valid tools for calculating solar radiation in mountainous areas, elementary knowledge of the tools is a must in order to use the results in an informed and responsible way. 7 77 97 7 Badania Fizjograficzne

Published
2016

9. The seasonal variabilityof the amount of global solar radiation reaching the ground in urban and rural areas on the example of Warsaw and Belsk

Author

Nelken, Kinga and Leziak, Kamil

Abstract

The aim of this paper is to determine the contemporary differences in the inflow of global solar radiation in Warsaw (urban station) and Belsk (rural station). The meteorological data used comprised daily sums of global solar radiation (in MJ•m−2) and the duration of sunshine (in hours) for the period 2008 2014. On clear days in spring and summer, the rural area receives more solar radiation in comparison to the urban area, whereas in autumn a reverse relationship occurs. On cloudy days in all seasons, the rural area receives more solar radiation than the urban area, and the relationship is the strongest in winter. Differences between urban and rural areas on cloudy days are smaller than those observed on clear days.

Published
2016
Full Text
View/download PDF

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