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Moisture fluxes and precipitation in Europe
Lemarie, Petr ; Müller, Miloslav (advisor) ; Šmídová, Jana (referee)
The present thesis deals with the influnence of moisture flux and variables, it is derived from, on rainfall in Europe. Sources of this thesis are the NCAR/NCEP and the ERA-40 reanalysis and the GPCC and the ECA&D rainfall databases. A western moisture flux prevails on studied 850 hPa isobaric level, it reaches the highest intensities over the Atlantic around 55th parallel of latitude. There is the highest correlation between moisture flux magnitude and monthly rainfall in winter on the western coast of Europe and it decreases in summer and eastwards. The correlation is very weak or none in some parts of Europe, especially in the eastern Mediterranean. Extremely wet months are related with different intensive moisture flux directions in different parts of Europe, for example there is the highest correlation of monthly rainfall with the northern moisture flux in the Czech Republic. Several selected heavy precipitation episodes in Europe are presented in this thesis - during them the moisture flux anomaly is observed, but it differs in orientation and intensity. A high wind speed causes this anomaly more frequently than a humidity. This does not apply to every event, furher research is needed to draw general patterns of moisture flux during high precipitation events.
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Determination of wind direction and speed from free atmosphere data
Mach, Václav ; Huth, Radan (advisor) ; Mikšovský, Jiří (referee)
4 Abstract Determination of wind direction and speed from free atmosphere data. This work deals with relationship between surface wind and large-scale predictors in the Czech Republic. Approach is statistical downscaling based on multiple linear regression with stepwise screening. Tested predictors include four geopotential heights (hgt 500, hgt 700, hgt 850 and hgt 1000), sea level pressure and surface wind components U and V. Observed surface wind speed and azimuth from 18 meteorological station ČHMÚ is used as predictand. Period of interest is define by used data on term 1961 - 2010. In three different methods are compared straight downscaling of wind components U and V, used wind speed calculate from downscaled components U and V, and straight downscaling of wind speed without distinguish wind direction. Resulting models are tested by cross-validation method. The resulting equation allows good simulation of surface wind at most of station. The better method to downscaling surface wind speed is prescribe method of calculate wind speed from downscaled components U and V.
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Determination of wind direction and speed from free atmosphere data
Mach, Václav ; Huth, Radan (advisor) ; Mikšovský, Jiří (referee)
4 Abstract Determination of wind direction and speed from free atmosphere data. This work deals with relationship between surface wind and large-scale predictors in the Czech Republic. Approach is statistical downscaling based on multiple linear regression with stepwise screening. Tested predictors include four geopotential heights (hgt 500, hgt 700, hgt 850 and hgt 1000), sea level pressure and surface wind components U and V. Observed surface wind speed and azimuth from 18 meteorological station ČHMÚ is used as predictand. Period of interest is define by used data on term 1961 - 2010. In three different methods are compared straight downscaling of wind components U and V, used wind speed calculate from downscaled components U and V, and straight downscaling of wind speed without distinguish wind direction. Resulting models are tested by cross-validation method. The resulting equation allows good simulation of surface wind at most of station. The better method to downscaling surface wind speed is prescribe method of calculate wind speed from downscaled components U and V.
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Wireless weather station
Filka, Tomáš ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
This diploma thesis deals with a draft of wireless weather station, whose task is to measure basic values inside and outside the home. Measured variables are for example temperature, atmospheric pressure, relative humidity, wind speed and direction or concentration of carbon dioxide (CO2). These data will be transmitted to a web server for later processing. Possible technical solutions are described and the outcome is a designed printed circuit boards, which has been assembled and tested. Resulting system was tested in trial operation.
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Moisture fluxes and precipitation in Europe
Lemarie, Petr ; Müller, Miloslav (advisor) ; Šmídová, Jana (referee)
The present thesis deals with the influnence of moisture flux and variables, it is derived from, on rainfall in Europe. Sources of this thesis are the NCAR/NCEP and the ERA-40 reanalysis and the GPCC and the ECA&D rainfall databases. A western moisture flux prevails on studied 850 hPa isobaric level, it reaches the highest intensities over the Atlantic around 55th parallel of latitude. There is the highest correlation between moisture flux magnitude and monthly rainfall in winter on the western coast of Europe and it decreases in summer and eastwards. The correlation is very weak or none in some parts of Europe, especially in the eastern Mediterranean. Extremely wet months are related with different intensive moisture flux directions in different parts of Europe, for example there is the highest correlation of monthly rainfall with the northern moisture flux in the Czech Republic. Several selected heavy precipitation episodes in Europe are presented in this thesis - during them the moisture flux anomaly is observed, but it differs in orientation and intensity. A high wind speed causes this anomaly more frequently than a humidity. This does not apply to every event, furher research is needed to draw general patterns of moisture flux during high precipitation events.
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Simple FITkit Based Weather-Station
Podivínský, Jakub ; Mičulka, Lukáš (referee) ; Strnadel, Josef (advisor)
In this bachelor thesis, the design and implementation of FITkit-based home weather-station is presented. In the thesis, various methods of measuring meteorological quantities are detailed and discussed together with advanteges and disadvantages of common electronic sensor parameters. Then, weather forecast methods are classified and principle of a simple weather-forecast algorithm based on the atmospheric pressure measurement and analysis is described and discussed according to its realization by the means of the FITkit platform. At the end of the thesis, design and realization of an additional hardware needed to operate the station on basis of FITkit is described.
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Miniaturized Measurement System for Wind Speed Estimation.
Štěpánek, Michal ; Vágner, Petr (referee) ; Urbanec, Tomáš (advisor)
This thesis is analysis of thermal anemometer, which contains design and realization. For measuring wind speed there are not used any mechanical moving parts in this way. This measuring uses two thermistors. One of these measures temperature of air, which is very important for compensation of whole system. Temperature of second thermistor is kept on constant value. This value is higher than surrounding air temperature about constant difference. Fluctuant air cools this sensor and because of that systém must supply more of heat. By analysis of value of supplied heat, we can calculate the wind speed value.
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Meteorology Information System
Vašíček, Jan ; Strnadel, Josef (referee) ; Šimek, Václav (advisor)
In this bachelor thesis is described design and realization of meteorology information system. It provides current weather conditions, weather history and it also offers flood early warning function. This work describes selection of technical equipment and its interconnection. It contains description of monitored meteorological quantities and methods which are suitable for measurement. It describes implementation of program for data collection and data processing and information system which is used as user interface of weather station.
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Analysis of the meteorological dates
Votavová, Barbora ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
The aim of this study is to recognize structure of data from the meteorological station, choose useful programme for its analysis and make a theoretical analysis and graphics. The work describes the collection of data from meteorological stations, data stucture, meteorological elements, their measurement and selection of appropriate statistical program. Practical part includes charts with commentary. Conclusion summarizes the results of the analysis.
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