|
|
Study of screen level temperature dependency on interactions and feedbacks of physics parameterizations in numerical weather prediction and climate models.
Švábik, Filip ; Huszár, Peter (advisor) ; Karlický, Jan (referee)
Screen level temperature is measured at 2 meters above the ground. It is one of the most used atmospheric characteristics in various applications in meteorology and other fields related to weather prediction. Essential is not only the knowledge of its current state, but also its prediction. It is forecasted by numerical weather prediction (NWP) models from the atmospheric current state. Its long-term characteristics can be obtained from the integration of climate models. This text discusses fundamental parametriza- tions, mostly related to temperature forecast, used in the NWP model ALADIN and the regional climate model RegCM. Physical processes which influence temperature are studied using ALADIN in several cases which include the presence of low cloudiness, gravity waves and inappropriate thermic coefficient. A detailed description of the most relevant parametrization schemes is given and the results are studied in a form of indi- vidual feedback loops. Most dominant processes are also found. However, the level of 2 meters above the ground is not the model level, so temperature at 2 meters is obtained by interpolation from the surface temperature and the lowest model level temperature. Using RegCM, two differently complex interpolation schemes are compared to each other. 1
|
|
|
Air temperature and its forecasting
Švábik, Filip ; Huszár, Peter (advisor) ; Belda, Michal (referee)
Weather forecasting, especially air temperature prediction, is important in many areas of human activity, from agriculture through the energy industry to air transport. This bachelor thesis describes successively different tasks which are behind the weather forecast, with an emphasis on the air temperature prediction. A brief overview of the weather forecasting history, from subjective methods to objective methods, is provided at the beginning of the work. A description of the air temperature measurement for the subsequent use in numerical models is also provided. Following part of the thesis deals with the prediction of the air temperature, from the description of the temporal cycles of the surface and air temperature, through the description of atmospheric dynamics and various physical processes, to the comparison of the air temperature determination in the frequently used numerical atmospheric models. The last part of the thesis focuses on the weather forecast verification and statistical evaluation of the air temperature prediction quality using data from the numerical model ALADIN. In relation with aviation meteorology, the work discusses the impact of air temperature on aviation safety.
|
guest ::
