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Abrupt day-to-day drops in air temperature and their seasonal distribution
Čašek, Matěj ; Müller, Miloslav (advisor) ; Křížová, Milada (referee)
The submitted thesis is focused on abrupt day-to-day air temperature drops. The theoretical part describes the meteorological and physical-geographical factors which influence air temperature. Abrupt air temperature drops were ascertained by daily data of maximum, minimum and mean air temperature in order to detect their potentional varying seasonalities. In thesis were used data from Praha-Ruzyně station between 1st January and 31st December. The results indicate that the interdiurnal air temperature drops vary in each temperature characteristics. While daily maximum air temperatures exhibit the greatest rates of decrease in summer months (July - August), the greatest drops of daily minimum air temperatures occur exclusively in December and January. Significant abnormality was ascertained during abrupt cooling at the turn of the years 1978 and 1979, when abrupt temperature drop was detect in both maximum and minimum air temperature. The seasonality of interdiurnal mean air temperature drops exhibit changes of both daily maximum and minimum air temperature. In thesis is also discussed the unsuitability of specification of intrdiurnal air tepmerature changes based on daily mean air temperature. Key words: temperature drop, cold front, radiation cooling, interdiurnal change

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