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Synoptic situations in Europe
Šubík, Štěpán ; Belda, Michal (advisor) ; Kučerová, Monika (referee)
OF THE BACHELOR THESIS Štěpán Šubík Synoptic situations in Europe Department of Atmospheric Physics Supervisor of the bachelor thesis: Mgr. Michal Belda, Ph.D. Advisor of the bachelor thesis: Mgr. Michal Žák, Ph.D. Study programme: Physics Study branch: General Physics Prague 2018 Title: Synoptic situations in Europe Author: Štěpán Šubík Department: Department of Atmospheric Physics Supervisor: Mgr. Michal Belda, Ph.D., Department of Atmospheric Physics Advisor: Mgr. Michal Žák, Ph.D., Department of Atmospheric Physics Abstract: This thesis is written to describe classifications of weather types, one of the methods applicable in Central and Western Europe. The main aim is to find an objective classification, which can be used as a help and support for different weather forecast models. The thesis is divided into three parts. The first part offers an information about the most used weather type classifications and their objective definitions. In the second part is a comparison of the objective classifications and their applicability in the area of Central and West Europe. In the third part, we used the classification selected in part two, the Lamb weather types, to classify the area in years 2011-2017. A relationship between the weather types and temperature was also studied above the...
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Long-term changes of selected stratospheric fields related to circulation and enhancing greenhouse effect
Kozubek, Michal ; Laštovička, Jan (advisor)
In the present work we study behavior and trends of stratospheric wind in period of 1957-2002. We used reanalyzed daily data from project ERA-40. Results are shown in graphic form for 3 atmospheric levels. In each level we describe trends of wind velocities and directions separate into 2 seasons. We also compare trends of stratospheric wind with other characteristic indicators of atmospheric circulation. One of them is total columnar ozone and the second is mesopause midlatitude winds. Results of analyze halving adjustment of trends in wind directions and velocities for level 100, 50 and 10 hPa, too.
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Synoptic situations in Europe
Šubík, Štěpán ; Belda, Michal (advisor) ; Kučerová, Monika (referee)
OF THE BACHELOR THESIS Štěpán Šubík Synoptic situations in Europe Department of Atmospheric Physics Supervisor of the bachelor thesis: Mgr. Michal Belda, Ph.D. Advisor of the bachelor thesis: Mgr. Michal Žák, Ph.D. Study programme: Physics Study branch: General Physics Prague 2018 Title: Synoptic situations in Europe Author: Štěpán Šubík Department: Department of Atmospheric Physics Supervisor: Mgr. Michal Belda, Ph.D., Department of Atmospheric Physics Advisor: Mgr. Michal Žák, Ph.D., Department of Atmospheric Physics Abstract: This thesis is written to describe classifications of weather types, one of the methods applicable in Central and Western Europe. The main aim is to find an objective classification, which can be used as a help and support for different weather forecast models. The thesis is divided into three parts. The first part offers an information about the most used weather type classifications and their objective definitions. In the second part is a comparison of the objective classifications and their applicability in the area of Central and West Europe. In the third part, we used the classification selected in part two, the Lamb weather types, to classify the area in years 2011-2017. A relationship between the weather types and temperature was also studied above the...
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Temperature trends in Europe estimated from different data sources
Krauskopf, Tomáš ; Huth, Radan (advisor) ; Pokorná, Lucie (referee)
This paper deals with the analysis of long-term temperature changes in Europe in the period 1957-2002 with an emphasis on the evaluation of the differences in values of temperature trends among selected data sources. One of the objectives of this paper is to analyze the spatial distribution of warming in Europe in individual seasons and to attempt to discuss the causes of different warming rates in different areas. Another aim of this thesis is to show, describe and justify differences in temperature trends between three different data sources: the ECA&D station database, the E-OBS interpolation network data set and the ERA-40 reanalysis. Despite the slight differences in the minimum and maximum temperature trends, the long-term mean surface air temperature change is mainly described. In the first part of the thesis we summarize the scientific literature dealing not only with warming in Europe but also the suitability of individual types of data sources for estimating the temperature trends. Most scientific articles at European level describe a long-term temperature change based on only one data source and do not analyze differences in temperature trends between databases. This diploma thesis should bring new or more detailed knowledge of these differences together with their justification. For...
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Global changes in the midlatitude stratosphere
Kozubek, Michal ; Laštovička, Jan (advisor) ; Halenka, Tomáš (referee) ; Metelka, Ladislav (referee)
Several phenomena in the middle latitude stratosphere are studied in the thesis. The reanalyses are utilized as a source of data for our study. Different reanalyses are compared each other and with observations and problems of reanalyses are shown. We are interested in connection between ozone, dynamics and other phenomena (Sudden Stratospheric Warmings, solar cycle, NAO etc.) in the stratosphere, mainly from 1979 to present using ERA-Interim, NCEP/NCAR reanalyses or satellite observations. The linear connection between total ozone difference and 100 hPa eddy heat flux is found in winter middle latitudes. Ozone trends in Europe and China are analysed. The meridional and zonal wind is also studied using MERRA reanalysis and model output (CCM SOCOL v3.0). The comparison of geographical distribution of geopotential height and meridional wind is done. Differences between MERRA and CCM SOCOL v3.0 has been observed for geopotential hight and meridional wind for winter season.
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Long-term changes of selected stratospheric fields related to circulation and enhancing greenhouse effect
Kozubek, Michal ; Laštovička, Jan (advisor)
In the present work we study behavior and trends of stratospheric wind in period of 1957-2002. We used reanalyzed daily data from project ERA-40. Results are shown in graphic form for 3 atmospheric levels. In each level we describe trends of wind velocities and directions separate into 2 seasons. We also compare trends of stratospheric wind with other characteristic indicators of atmospheric circulation. One of them is total columnar ozone and the second is mesopause midlatitude winds. Results of analyze halving adjustment of trends in wind directions and velocities for level 100, 50 and 10 hPa, too.
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