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Short-term intensities of strong precipitation at the Milšeovka Mt.
Kakalejčík, Matej ; Müller, Miloslav (advisor) ; Minářová, Jana (referee)
Source of intense short term precipitation in mid latitudes are deep moist convection or frontal rainbands. Intensity and precipitation rate are strongly dependent on size and speed of precipitation system. If the axis of linear precipitation system is parallel to the vector movement, or if the new cell in multicelar systems are developing on the same place, very high intense precipitation occurs. This is called quazistacionary of precipitation system. Quazistacionary can give rise to extreme precipitation amounts which may cause flash floods. Intensity of precipitation can be measured either by automatic rain gauges or meteorological radars. This thesis is concerned with the tipping-bucket rain gauge. The analysed data between years 1998 and 2012 were collected from meteorological station Milešovka. Based on the results from warm part of the year (April - October), short term intense precipitation are most intense in July, while the total maximums of rainfall intensity are mostly occurring in May. This is probably the result of annual course of air instability which in continental Europe is considered to be in May. Regarding 24 h precipitation amounts, small intensities have bigger portion on total 24 h precipitation amount. Keywords: precipitation intensity, deep moist convection, frontal...
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Frequency and trend analysis of rain-on-snow events at selected meteorological stations in the Czech Rebublic
Kakalejčík, Matej ; Jeníček, Michal (advisor) ; Blahušiaková, Andrea (referee)
Rain-on-snow events represent a natural hydro-meteorological phenomenon and their occurrence is often associated with floods. Due to the climate change occurrence, rain-on snow events are also changing. The main goal of diploma thesis is to define spatial and temporal occurrence of rain-on-snow events at 16 selected meteorological stations in the Czech Republic between the years 1966-2012. Spatial occurrence of rain-on-snow events is expressed by number of events per meteorological station. Final number of events varies widely even between the stations with similar altitude. Stations with the highest frequency of rain-on-snow events are located in Jizerské hory between 675 and 780 m a.s.l. Temporal occurrence of rain- on-snow events is expressed by number of events per year and month respectively. Time series of rain-on-snow events were analysed by statistical trends to gain information about changes in occurrence over time. Most of the stations proved no statistically significant trend. There was a trend detected only at four out of 16 stations. Three meteorological stations showed a rising trend, whereas one station signalled a decreasing trend. More complex results were produced by the trend analysis of monthly time series of rain-on snow events. Nine stations yielded at least one month with a...
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Short-term intensities of strong precipitation at the Milšeovka Mt.
Kakalejčík, Matej ; Müller, Miloslav (advisor) ; Minářová, Jana (referee)
Source of intense short term precipitation in mid latitudes are deep moist convection or frontal rainbands. Intensity and precipitation rate are strongly dependent on size and speed of precipitation system. If the axis of linear precipitation system is parallel to the vector movement, or if the new cell in multicelar systems are developing on the same place, very high intense precipitation occurs. This is called quazistacionary of precipitation system. Quazistacionary can give rise to extreme precipitation amounts which may cause flash floods. Intensity of precipitation can be measured either by automatic rain gauges or meteorological radars. This thesis is concerned with the tipping-bucket rain gauge. The analysed data between years 1998 and 2012 were collected from meteorological station Milešovka. Based on the results from warm part of the year (April - October), short term intense precipitation are most intense in July, while the total maximums of rainfall intensity are mostly occurring in May. This is probably the result of annual course of air instability which in continental Europe is considered to be in May. Regarding 24 h precipitation amounts, small intensities have bigger portion on total 24 h precipitation amount. Keywords: precipitation intensity, deep moist convection, frontal...
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