University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Vanessa Scheungraber
(2022):
An analysis of frequency, mean rain rate, and seasonality of daily, hourly, and event-based heavy precipitation in the Greater Vienna region.
Master / Diploma Thesis - Institut für Meteorologie und Klimatologie,
BOKU-Universität für Bodenkultur,
pp 117.
UB BOKU
obvsg
FullText
- Abstract:
- Heavy precipitation has the potential to cause great damage and endanger human lives. Climate change can increase the intensity and frequency of heavy precipitation; however, changes vary regionally. The aim of this work is therefore to identify changes in heavy precipitation at the local /regional level for Vienna and its surroundings. The main research question addressed in this thesis is: How has the frequency and intensity of heavy precipitation changed in the Greater Vienna region during recent decades? To answer this question, 10-minute and daily precipitation measurements of the last 30 to 40 years at ten selected stations were analysed. Both 24h-precipitation as well as 1h- and event-precipitation were examined. The results show an increase in frequency and mean rain rate of heavy precipitation in the last 15 years, although results vary for different temporal frameworks for which heavy precipitation has been computed. The analysis shows the largest increase in the frequency of heavy precipitation days, while the smallest increase can be observed in the categorisation of heavy precipitation as events. In contrast to frequency, the intensity of heavy precipitation has increased only slightly, here however, most strongly for events with a 12 % increase. The calculations show that it is important to include different time units of heavy precipitation as well as both frequency and intensity in analyses seeking to understand the changing nature of heavy precipitation, as the results differ depending on the definition applied.
- Beurteilende*r: Rieder Harald