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EUMETSAT SAFNWC (SAF in Support to Nowcasting and Very Short-Range Forecasting) and its applications in meteorology
Šťástka, Jindřich ; Setvák, Martin (advisor) ; Bednář, Jan (referee)
In the present work we study products for processing data from weather satellites named SAFNWC (SAF in Support to Nowcasting and Very Short-Range Forecasting). SAFNWC is one of the most important of EUMETSAT SAFs (dedicated centers of excellence for processing satellite data), delivering both - complex software modules, as well as operational products delivered in real-time to the end users. Main goal of the thesis is to prepare an overview of presently available software modules and their operational products, with emphasis on the MSG data. Second goal, depending on available software modules and support data resources, is to experimentally implement some of the modules in the Czech Hydrometeorological Institute (CHMI).
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Convective storms and lower stratospheric moisture
Šťástka, Jindřich ; Setvák, Martin (advisor)
Title: Convective storms and lower stratospheric moisture Author: Jindřich Šťástka Department: Department of Atmospheric Physics Supervisor: RNDr. Martin Setvák, CSc., Czech Hydrometeorological Institute Abstract: The primary focus of this thesis is to diagnose contributions to upper tropo- spheric and lower stratospheric (UTLS) water vapor from convective storms. The first parts of this work introduces two approaches used for a detection of lower stratospheric water vapor above convective storm tops - brightness temperature difference (BTD) technique and EOS MLS measurements. The BTD technique is based on brightness temperature difference between the water vapor absorp- tion and infrared window bands, assuming a thermal inversion above the cloud top level. The most frequently offered explanation of positive BTD values above convective storms is presence of warmer water vapor in the lower stratosphere. Furthermore, so called BTD anomalies were described and it was proposed an algorithm for objective detection of such BTD anomalies. Characteristics of pa- rameters describing BTD, BTD anomaly, infrared window brightness temperature were investigated during storms evolution on dataset of 320 storms from the area of Europe. The analysis of these characteristics proved highly probable conection between positive...
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Convective storms and lower stratospheric moisture
Šťástka, Jindřich ; Setvák, Martin (advisor)
Title: Convective storms and lower stratospheric moisture Author: Jindřich Šťástka Department: Department of Atmospheric Physics Supervisor: RNDr. Martin Setvák, CSc., Czech Hydrometeorological Institute Abstract: The primary focus of this thesis is to diagnose contributions to upper tropo- spheric and lower stratospheric (UTLS) water vapor from convective storms. The first parts of this work introduces two approaches used for a detection of lower stratospheric water vapor above convective storm tops - brightness temperature difference (BTD) technique and EOS MLS measurements. The BTD technique is based on brightness temperature difference between the water vapor absorp- tion and infrared window bands, assuming a thermal inversion above the cloud top level. The most frequently offered explanation of positive BTD values above convective storms is presence of warmer water vapor in the lower stratosphere. Furthermore, so called BTD anomalies were described and it was proposed an algorithm for objective detection of such BTD anomalies. Characteristics of pa- rameters describing BTD, BTD anomaly, infrared window brightness temperature were investigated during storms evolution on dataset of 320 storms from the area of Europe. The analysis of these characteristics proved highly probable conection between positive...
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Convective storms and lower stratospheric moisture
Šťástka, Jindřich ; Setvák, Martin (advisor) ; Púčik, Tomáš (referee) ; Zacharov, Petr (referee)
Title: Convective storms and lower stratospheric moisture Author: Jindřich Šťástka Department: Department of Atmospheric Physics Supervisor: RNDr. Martin Setvák, CSc., Czech Hydrometeorological Institute Abstract: The primary focus of this thesis is to diagnose contributions to upper tropo- spheric and lower stratospheric (UTLS) water vapor from convective storms. The first parts of this work introduces two approaches used for a detection of lower stratospheric water vapor above convective storm tops - brightness temperature difference (BTD) technique and EOS MLS measurements. The BTD technique is based on brightness temperature difference between the water vapor absorp- tion and infrared window bands, assuming a thermal inversion above the cloud top level. The most frequently offered explanation of positive BTD values above convective storms is presence of warmer water vapor in the lower stratosphere. Furthermore, so called BTD anomalies were described and it was proposed an algorithm for objective detection of such BTD anomalies. Characteristics of pa- rameters describing BTD, BTD anomaly, infrared window brightness temperature were investigated during storms evolution on dataset of 320 storms from the area of Europe. The analysis of these characteristics proved highly probable conection between positive...
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Convective storms development in remote sensing data
Uhlíková, Tereza ; Novák, Petr (advisor) ; Šťástka, Jindřich (referee)
Title: Convective storms development in remote sensing data Author: Tereza Uhlíková Department: Department of Physical Geography and Geoecology Supervisor: RNDr. Petr Novák, Ph. D. Supervisor's e-mail: petr.novak@chmi.cz Systems of remote sensing and computing technologies are nowadays at such a developed level, they are providing tools for identifying and tracking convective storms as well as for measuring their parameters. In this study, the nowcasting algorithm CELLTRACK is used to identify convective cells as a high reflectivity cores (≥44 dBZ) in the radar data (CZRAD). CELLTRACK is also used to obtain parameters of these cells from radar data and lightning detection data (CELDN) over the territory of Czech Republic. Six single isolated cells and six cells producing severe convective phenomena were selected from the years 2010 - 2014. The development of selected parameters during the life cycle of convective cells in both groups is demonstrated and threshold values of these parameters, that can potentially help to identify severe convective cells, are proposed. key words: convective cell, severe convective storm, remote sensing of convective storms, nowcasting, CELLTRACK, CZRAD, CELDN
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EUMETSAT SAFNWC (SAF in Support to Nowcasting and Very Short-Range Forecasting) and its applications in meteorology
Šťástka, Jindřich ; Setvák, Martin (advisor) ; Bednář, Jan (referee)
In the present work we study products for processing data from weather satellites named SAFNWC (SAF in Support to Nowcasting and Very Short-Range Forecasting). SAFNWC is one of the most important of EUMETSAT SAFs (dedicated centers of excellence for processing satellite data), delivering both - complex software modules, as well as operational products delivered in real-time to the end users. Main goal of the thesis is to prepare an overview of presently available software modules and their operational products, with emphasis on the MSG data. Second goal, depending on available software modules and support data resources, is to experimentally implement some of the modules in the Czech Hydrometeorological Institute (CHMI).
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