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Severe lightning activity over the Czech republic
Uhlíková, Tereza ; Novák, Petr (advisor) ; Kyznarová, Hana (referee)
This work comprises an introduction to study of lightning and presents data about daily amount of lightning flashes over the Czech Republic (CR) in period 2002-2012. For selected days in this period, there are introduced and examined some meteorological characteristics. There are presented an evolution of lightning discharges and contemporary options for lightning detection which contain ground-based systems and satellites systems. Main advantage of ground-based systems are location accuracy <1 km and additional information which could be provided about every single stroke which is e. g. polarity or peak current. The benefit of satellite lightning detection is the large covera- ge which is useful for a global view of lightning activity on the Earth. After that, the general climatology of lightning in the world is introduced. The land-ocean contrast in lightning activity is presented (lightning activity over land is up to two orders higher than over the ocean). There is also information about maximum amount of flashes over equatorial Africa. The hypothesis explaining the land-ocean contrast in lightning activity and African maximum are included. Climatological charakteristics of lightning in selec- ted European countries are mentioned in the last section. In analytical part of the work, single years...
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Contemporary possibilities of atmosphere lightning detection
Nettl, Tomáš ; Žák, Michal (advisor) ; Pišoft, Petr (referee)
The aim of this thesis is to make a survey about posibilities of detection atmosferic discharges, describe their principles and properties. The other aim of thesis is comparing the systems CELDN and LINET. These two systems cover the area of Czech Republic. The first part of this work concerns of basic characteristic of flashes and electric properties of the atmosphere. The basic model of air discharges distribution in a storm and an electric field around is mentioned. Then the thesis describes the basic flash detection systems and the methods of detection.The end of the work describes systems covering Czech Republic - CELDN and LINET. Also basic characteristics of these systems derived from real data are discussed.
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Severe lightning activity over the Czech republic
Uhlíková, Tereza ; Novák, Petr (advisor) ; Kyznarová, Hana (referee)
This work comprises an introduction to study of lightning and presents data about daily amount of lightning flashes over the Czech Republic (CR) in period 2002-2012. For selected days in this period, there are introduced and examined some meteorological characteristics. There are presented an evolution of lightning discharges and contemporary options for lightning detection which contain ground-based systems and satellites systems. Main advantage of ground-based systems are location accuracy <1 km and additional information which could be provided about every single stroke which is e. g. polarity or peak current. The benefit of satellite lightning detection is the large covera- ge which is useful for a global view of lightning activity on the Earth. After that, the general climatology of lightning in the world is introduced. The land-ocean contrast in lightning activity is presented (lightning activity over land is up to two orders higher than over the ocean). There is also information about maximum amount of flashes over equatorial Africa. The hypothesis explaining the land-ocean contrast in lightning activity and African maximum are included. Climatological charakteristics of lightning in selec- ted European countries are mentioned in the last section. In analytical part of the work, single years...
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Contemporary possibilities of atmosphere lightning detection
Nettl, Tomáš ; Žák, Michal (advisor) ; Pišoft, Petr (referee)
The aim of this thesis is to make a survey about posibilities of detection atmosferic discharges, describe their principles and properties. The other aim of thesis is comparing the systems CELDN and LINET. These two systems cover the area of Czech Republic. The first part of this work concerns of basic characteristic of flashes and electric properties of the atmosphere. The basic model of air discharges distribution in a storm and an electric field around is mentioned. Then the thesis describes the basic flash detection systems and the methods of detection.The end of the work describes systems covering Czech Republic - CELDN and LINET. Also basic characteristics of these systems derived from real data are discussed.
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