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Changes in light pollution during the night
Klauda, Ondřej ; Matějček, Tomáš (advisor) ; Müller, Miloslav (referee)
Light pollution is an environmental problem, the consequences of which include higher level of night sky brightness, negative effects on organisms and natural ecosystems, degradation of quality of life and potential human health problems. Light pollution arises due to improper focusing of luminaires, excessive intensity of artificial light and lighting in unsuitable time. This diploma thesis focuses on changes in light pollution during the night. The main working hypothesis does not assume significant changes in light pollution during the night. The literature review of the diploma thesis describes natural and artificial influences on night sky brightness, temporal changes in light pollution, methods of visualization of light pollution in maps and characteristics of the study area. Within the study area in the Central Bohemia, there were executed measurements of night sky brightness using a Sky Quality Meter. The field stands have been chosen to represent urban, suburban and rural landscape. Based on the analysis of time series of night sky brightness, three types of night sky brightness courses were identified. The most intense changes of night sky brightness were proved in suburban landscape. On the contrary, the least intense changes of night sky brightness were proved in rural landscape....
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Analýza dlouhodobého vývoje jasu noční oblohy na Observatoři Pierre Augera
Podškubka, Radek ; Prouza, Michael (advisor) ; Trávníček, Petr (referee)
In this paper we compare night sky brightness at the Pierre Auger Observatory with the flux of the solar extreme UV radiation. The night sky brightness is measured for monitoring purposes during operation of fluorescence detectors. The data were processed several times under slightly different conditions that should exclude the impact of moonlight, artificial light pollution and cloudiness. If one does not consider the effects mentioned before, the main source of night sky brightness is an airglow. The goal is to show that night sky brightness correlates with the flux of solar extreme UV radiation, what will confirm that extreme UV radiation is the cause of the airglow origin.
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Light pollution of the Kladno region
Klauda, Ondřej ; Matějček, Tomáš (advisor) ; Bobr, Ladislav (referee)
Light pollution is an environmental problem caused by overuse of artificial light at night. Light pollution mainly affects densely populated areas and industrial regions. In addition to night sky brightening, light pollution also causes discomfort and has negative health and environmental impacts. The literature review of this bachelor thesis deals with light, light pollution and the study area in three chapters. The aim of the practical part is examination of interaction of landscape and light pollution. On the basis of field measurements by the Sky Quality Meter in the surroundings of Kladno, the effect of forest on propagation of light pollution is assessed. The working hypothesis assumes the barrier effect of the forest. The hypothesis is not safely confirmed by the results, nevertheless the influence of Prague on night sky brightness has been shown. Keywords: light pollution, night sky brightness, barrier effect of forest, Sky Quality Meter, Kladno region
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Analýza dlouhodobého vývoje jasu noční oblohy na Observatoři Pierre Augera
Podškubka, Radek ; Prouza, Michael (advisor) ; Trávníček, Petr (referee)
In this paper we compare night sky brightness at the Pierre Auger Observatory with the flux of the solar extreme UV radiation. The night sky brightness is measured for monitoring purposes during operation of fluorescence detectors. The data were processed several times under slightly different conditions that should exclude the impact of moonlight, artificial light pollution and cloudiness. If one does not consider the effects mentioned before, the main source of night sky brightness is an airglow. The goal is to show that night sky brightness correlates with the flux of solar extreme UV radiation, what will confirm that extreme UV radiation is the cause of the airglow origin.
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