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Using a Hybrid Method for Control the Storage Capacity of the Dam Reservoir
Pospíšilík, Šimon ; Kozel, Tomáš (referee) ; Menšík, Pavel (advisor)
Bachelor thesis is focused on the selection of a suitable input regional climate model into the Hybrid method for the control of the storage function of water reservoirs. This control method is based on a suitable combination optimization method with the Support vector machines method. Selecting a suitable regional climate model is done by simulating the control of the storage function of water reservoirs Vír I in program Microsoft Exel. The simulation results of the hybrid control method are compared with other control methods. These methods are Adaptive control, Dispatcher graph, and control to Improved outflow.
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New parameterizations in the RegCM model
Pitaš, Ondřej ; Belda, Michal (advisor) ; Karlický, Jan (referee)
This thesis compares new physical parameterizations in the regional climate model system RegCM with the standard settings used at the Department of Atmospheric Phy- sics and observed climatic conditions. The first part is dedicated to the description of individual parameterizations and to the essential introduction to the RegCM model. In addition, model preprocessing and running simulations are discussed. The simulations were conducted over Europe domain for the ten-year period (1990-1999) with five dif- ferent model settings. Holtslag PBL(Holtslag, 1990) type boundary layer scheme, Grell cumulus convention scheme over land and ocean and Explicit moisture scheme (SUBEX; Pal et al 2000) were used in the reference simulation. In the conducted simulations, the following physical parametrizations were used separately: UW PBL (Bretherton and McCaa, 2004) boundary layer scheme, Explicit moisture Nogherotto/Tompkins mois- ture scheme, Tiedtke (1996) and Kain-Fritsch (1990) & Kain (2004) cumulus convention schemes over land and ocean. None of the new physical parameterizations showed impro- vements over standard setting in all analyzed variables at the same time. Precipitation is best described by reference simulation as well as by simulations with UW PBL and Kain- Fritsch & Kain parametrization type. Kain-Fritsch...
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Spatial variability of precipitation annual cycles
Slezáčková Zíková, Naděžda
Title: Spatial variability of precipitation annual cycles Author: Naděžda Zíková Department: Department of Meteorology and Environment Protection Supervisor: doc. RNDr. Jaroslava Kalvová, CSc. Supervisor's e-mail address: Jaroslava.Kalvova@mff.cuni.cz Abstract: This thesis enquires into the spatial variability of precipitation annual cycles and its representation by regional climate models. Goal is to find suitable metrics that could describe spatial character of the precipitation field and con- sequently evaluate model results. For complete understanding the issue, there is an introduction to modeling with regional climate models and also parameters of the precipitation in the Czech Republic. The main part of the thesis is an application of different methods of descripiton on the results of the regional cli- mate models (including the Czech model ALADIN) and CRU data. Results of the models are compared to observed data transferred into the regular grid. Each method is applied on the model results and assessed with regard to advantages and disadvantages. The metrics that were found useful are recommended for the further evaluation of the spatial variability of precipitation annual cycles. The ALADIN model seems to be quite successfull, weak points are only modelling of the precipitation in spring and the effect...
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New parameterizations in the RegCM model
Pitaš, Ondřej ; Belda, Michal (advisor) ; Karlický, Jan (referee)
This thesis compares new physical parameterizations in the regional climate model system RegCM with the standard settings used at the Department of Atmospheric Phy- sics and observed climatic conditions. The first part is dedicated to the description of individual parameterizations and to the essential introduction to the RegCM model. In addition, model preprocessing and running simulations are discussed. The simulations were conducted over Europe domain for the ten-year period (1990-1999) with five dif- ferent model settings. Holtslag PBL(Holtslag, 1990) type boundary layer scheme, Grell cumulus convention scheme over land and ocean and Explicit moisture scheme (SUBEX; Pal et al 2000) were used in the reference simulation. In the conducted simulations, the following physical parametrizations were used separately: UW PBL (Bretherton and McCaa, 2004) boundary layer scheme, Explicit moisture Nogherotto/Tompkins mois- ture scheme, Tiedtke (1996) and Kain-Fritsch (1990) & Kain (2004) cumulus convention schemes over land and ocean. None of the new physical parameterizations showed impro- vements over standard setting in all analyzed variables at the same time. Precipitation is best described by reference simulation as well as by simulations with UW PBL and Kain- Fritsch & Kain parametrization type. Kain-Fritsch...
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Using a Hybrid Method for Control the Storage Capacity of the Dam Reservoir
Pospíšilík, Šimon ; Kozel, Tomáš (referee) ; Menšík, Pavel (advisor)
Bachelor thesis is focused on the selection of a suitable input regional climate model into the Hybrid method for the control of the storage function of water reservoirs. This control method is based on a suitable combination optimization method with the Support vector machines method. Selecting a suitable regional climate model is done by simulating the control of the storage function of water reservoirs Vír I in program Microsoft Exel. The simulation results of the hybrid control method are compared with other control methods. These methods are Adaptive control, Dispatcher graph, and control to Improved outflow.
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Spatial variability of precipitation annual cycles
Slezáčková Zíková, Naděžda
Title: Spatial variability of precipitation annual cycles Author: Naděžda Zíková Department: Department of Meteorology and Environment Protection Supervisor: doc. RNDr. Jaroslava Kalvová, CSc. Supervisor's e-mail address: Jaroslava.Kalvova@mff.cuni.cz Abstract: This thesis enquires into the spatial variability of precipitation annual cycles and its representation by regional climate models. Goal is to find suitable metrics that could describe spatial character of the precipitation field and con- sequently evaluate model results. For complete understanding the issue, there is an introduction to modeling with regional climate models and also parameters of the precipitation in the Czech Republic. The main part of the thesis is an application of different methods of descripiton on the results of the regional cli- mate models (including the Czech model ALADIN) and CRU data. Results of the models are compared to observed data transferred into the regular grid. Each method is applied on the model results and assessed with regard to advantages and disadvantages. The metrics that were found useful are recommended for the further evaluation of the spatial variability of precipitation annual cycles. The ALADIN model seems to be quite successfull, weak points are only modelling of the precipitation in spring and the effect...
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Regional Climate Modeling
Belda, Michal ; Halenka, Tomáš (advisor) ; Huth, Radan (referee) ; Metelka, Ladislav (referee)
Regional climate models are commonly used for downscaling global climate simulations to the regional scale using nested limited-area models. One of the main goals of this work was the application of regional model RegCM in very high resolution for the region with complex topography in the framework of EC FP6 project CECILIA. RegCM was employed to downscale climate change scenario simulations performed by ECHAM5 model according to the IPCC A1B emission scenario for Central and Eastern Europe in 10km resolution. Validation of model performance, assessed by nesting RegCM in ERA-40 reanalysis, shows improvement of regional climate patterns mainly in mountainous areas. Temperature is well represented with mostly cold bias around -1 žC. Precipitation is affected by large biases around 80 %, in mountainous areas up to 400 % overestimation in winter. Downscaled climate change signal shows average warming 0.51.5 žC in period 20212050 and 24 žC in period 20712100. Precipitation changes are mostly within ±0.5 mm/day. RegCM3beta version with adjusted precipitation scheme parameters shows improvement of the precipitation bias, difference in climate change is rather negligible. Experiments with different convection schemes of RegCM in a case study for Africa performed in the framework of CORDEX project are...
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