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Interdiurnal variability of air temperature
Vodičková, Kateřina ; Holtanová, Eva (advisor) ; Mikšovský, Jiří (referee)
Title: Interdiurnal variability of air temperature Author: Kateřina Vodičková Department: Department of Atmospheric Physics Supervisor: RNDr. Eva Holtanová, Ph.D., Department of Atmospheric Physics Abstract: One of important climate characteristics is interdiurnal variability of air temperature. Significant attention of the bachelor thesis was paid to anomalies from a smoothed annual course of daily mean air temperature and their interdiurnal and multidiurnal variability. Changes of anomalies and their variability during period 1900-2015 on various climatologic stations in central Europe were studied. The changes of anomalies and their interdiurnal variability fits the changes of the air temperature in the 20th century. An increasing trend of interdiurnal variability of anomalies of air temperature in last decades was found. Keywords: air temperature, variability, interdiurnal changes, mean annual cycle, anomaly from mean annual cycle
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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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The contribution of anticyclonic circulation to the asymetry of day-to-day temperature changes distribution
Piskala, Vladimír ; Huth, Radan (advisor) ; Müller, Miloslav (referee)
The statistical distribution of daily changes in temperature is not symmetrical, and also the day-to-day temperature changes distribution varies for winter and summer. The aim of submitted thesis is to connect the asymmetry of distribution with physical causes. Specifically, the aim is to check the following hypothesis: the more frequent occurrence of coolings up to -3 řC in winter a heatings up to 3 řC in summer is associated with radiation balance during the anticyclonic flow over Central Europe. The relationship of day-to-day temperature changes with passages of atmospheric fronts is also described. Temperature changes in winter (December - February) are calculated from minimum temperatures while in summer (June - August) maximum temperatures are used. The study period covers years between 1961 and 1998. The Hess-Brezowsky catalogue of weather types, the HMÚ classification and selected classifications of COST733 database are used for description of circulation conditions in Central Europe. The connection of anticyclonic flow with frequent coolings in winter was not proved. On the other hand, in summer, the association between frequent warmings and anticyclonic flow was confirmed. In addition, the advection of cold air in winter and warm air in summer also contributes to asymmetry of the...
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Asymmetry of interdiurnal air temperature change distributions and their relationships to meterological conditions
Piskala, Vladimír ; Huth, Radan (advisor) ; Křížová, Milada (referee)
Submitted bachelor thesis is focused on interdiurnal air temperature changes in connection with atmospheric fronts. The changes are counted for summer period (June - August) and winter period (December - February) between 1961 - 1998. There were used data of average air temperature from Praha Karlov and data of moving fronts from Praha Ruzyně. The results say that the statistical distribution of day-to-day air temperature aren't the same. The asymmetry are explained by different meteorological condition for both periods. Statistical distribution fronts aren't normal too, it can be explained by character and shape of individual front types. It is discussed role of time of observation individual fronts for counting day-to- day temperature changes in thesis too. Key words: air temperature, day-to-day changes, statistical distribution, atmospheric fronts, air masses
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