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Frequency and composition of fog in the Czech Republic
Esterlová, Jana ; Hůnová, Iva (advisor) ; Stráník, Vojtěch (referee)
This thesis deals with the occurrence of fog in The Czech Republic and its composition. It engages in current status and also historical evolution (since about the second half of 20th century). The thesis is divided into two parts. The first part is the research of the professional literature, which sums up the results of realized studies, explains terms connected with fog and describes methods used for fog quantification. The second part contains results of my own study for the city station Prague-Libuš (1971-2015) and mountain station Churáňov (Šumava, 1961- 2015). The fog is an often underestimated phenomenon, which has provable influence on water balance and contributes to the atmospheric deposition, especially in mountain ranges, where the occurrence is higher. The composition of fog is being changed during the observed time. The amplest ions are in most cases NO3 - , NH4 + , SO4 2- , Cl- a Ca2+ . In connection with decreasing general air pollution shows, it goes also to reduction the concentrations of pollutants in the fog. Because of the lower content of these particles the occurrence of fog might be also lower in the cities and former highly-polluted regions caused by the lower number of condensation nuclei, which is noticeable on Prague-Libuš. In connection with global warming there are...
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Dynamics of vertical and horizontal profiles of atmospheric aerosol in planetary boundary layer
Esterlová, Jana ; Hovorka, Jan (advisor) ; Jančík, Petr (referee)
The boundary layer of the atmosphere is a layer of air with thickness about 1 km above the ground. Open-cast mining is one of activities that polutes the air in this layer. It generates particulate matter (PM) mostly in size of aerodynamic diameter 1 - 10 µm - coarse patricles. The companies that does the mining pays for their emissions due to the law. However, these emissions are not experimentraly measured, they are calculated from given equation consisting of factors like the size of mining area, etc. Some papers have shown significantly higher concentrations of Coarse particles (or PM10) in surroundings of the mine. Other papers have found out that the origin of these high concentrations didn't come from the mining activities but is caused due to the activities at the place of measuring or nearby. There aren't many papers that measure the PM concentrations in the air in the mining area. This thesis shows the results of airship measurements in the air layers of the open-cast mine and above them. The experimentral site was brown coal mine Bílina in the North of The Czech Republic in important mining area. The measurements took place in December 2017. For measuring the number and mass concentrations was used APS - Aerodynamic Particle Sizes Spektrometr by TSI which sorts out the data into...
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Dynamics of vertical and horizontal profiles of atmospheric aerosol in planetary boundary layer
Esterlová, Jana ; Hovorka, Jan (advisor) ; Jančík, Petr (referee)
The boundary layer of the atmosphere is a layer of air with thickness about 1 km above the ground. Open-cast mining is one of activities that polutes the air in this layer. It generates particulate matter (PM) mostly in size of aerodynamic diameter 1 - 10 µm - coarse patricles. The companies that does the mining pays for their emissions due to the law. However, these emissions are not experimentraly measured, they are calculated from given equation consisting of factors like the size of mining area, etc. Some papers have shown significantly higher concentrations of Coarse particles (or PM10) in surroundings of the mine. Other papers have found out that the origin of these high concentrations didn't come from the mining activities but is caused due to the activities at the place of measuring or nearby. There aren't many papers that measure the PM concentrations in the air in the mining area. This thesis shows the results of airship measurements in the air layers of the open-cast mine and above them. The experimentral site was brown coal mine Bílina in the North of The Czech Republic in important mining area. The measurements took place in December 2017. For measuring the number and mass concentrations was used APS - Aerodynamic Particle Sizes Spektrometr by TSI which sorts out the data into...
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Frequency and composition of fog in the Czech Republic
Esterlová, Jana ; Hůnová, Iva (advisor) ; Stráník, Vojtěch (referee)
This thesis deals with the occurrence of fog in The Czech Republic and its composition. It engages in current status and also historical evolution (since about the second half of 20th century). The thesis is divided into two parts. The first part is the research of the professional literature, which sums up the results of realized studies, explains terms connected with fog and describes methods used for fog quantification. The second part contains results of my own study for the city station Prague-Libuš (1971-2015) and mountain station Churáňov (Šumava, 1961- 2015). The fog is an often underestimated phenomenon, which has provable influence on water balance and contributes to the atmospheric deposition, especially in mountain ranges, where the occurrence is higher. The composition of fog is being changed during the observed time. The amplest ions are in most cases NO3 - , NH4 + , SO4 2- , Cl- a Ca2+ . In connection with decreasing general air pollution shows, it goes also to reduction the concentrations of pollutants in the fog. Because of the lower content of these particles the occurrence of fog might be also lower in the cities and former highly-polluted regions caused by the lower number of condensation nuclei, which is noticeable on Prague-Libuš. In connection with global warming there are...
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