Abstract (eng)
In this diploma thesis, the convective available potential energy at 12 UTC is calculated by the Gauss Trapezium Algorithm, surface temperature and dew point at 11 stations in the Alpine region. In addition to that, radiosondes of the surrounding are first checked on errors and then used for the calculation. CAPE is generally computed from 1980 to 2005 if data is available. The computing is done in MATLAB. The analysis starts with a general frequency analysis of the CAPE- values at the chosen stations. Some stations have no satisfying data with a lot of missing values and are not fit for further investigations. Others, like Samedan or Krimml, don´t have many days with positive CAPE cause of their high altitude locations. Furthermore, it is tried to reveal some trends over the period of 1980 to 2005, especially to investigate not only the days with positive CAPE but also the maxima of calculated CAPE- values. CAPE is only a potential and does not generally assure thunderstorm developments. As a consequence it is an important question, if there are connections between some certain CAPE- values and observed thunderstorms. The stations are investigated (WW and ww) and thunderstorm observations are compared with according CAPE- values. Finally, some examples are given to illustrate ascents of parcels and CAPE in Skew-T log p-diagrams. Besides, a brief interpretation of the weather conditions is also done.