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Blocking of westerly flow over Central Europe
Žáček, Ondřej ; Žák, Michal (advisor) ; Huszár, Peter (referee)
This bachelor thesis analyses atmospheric blocking and its influence on European weather, with focus on Czech Republic. Atmospheric blocking is a phenomenon when western flow is interrupted by high pressure centre. The research subjects are summarising information about blocking, its formation, detection, climatology, annual cycle and interannual variability. At stations Praha-Klementinum and Olomouc was made correlation analyses different strengths of blocking in sector 60 ř W - 60ř E (with step 15ř) and monthly mean daily average, minimum, maximum temperature. We find out, that blocking frequency has significant interannual variability and annual cycle for all strengths of blocking which we defined. Based on correlation analyses we found out for both stations significant negative correlation between average monthly temperature and frequency of blocking in winter, in spring and autumn negative correlation is less significant and in summer for some longitudes positive correlation was found. If we use for correlation analyses monthly mean of minimum or maximum temperature, differences are insignificant. Differences of correlations between Praha-Klementinum and Olomouc are slight, at Praha-Klementinum station is correlations slightly lower.
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Coupling atmospheric chemistry/aerosols to regional climate models
Huszár, Peter ; Halenka, Tomáš (advisor) ; Macoun, Jan (referee) ; Eben, Kryštof (referee)
Title: Coupling atmospheric chemistry/aerosols to regional climate models Author: Peter Huszár Department: Department of Meteorology and Environment Protection Supervisor: doc. RNDr. Tomáš Halenka, CSc. Supervisor's e-mail address: tomas.halenka@mff.cuni.cz Abstract: In this thesis, the connections between air quality and climate are studied. For this purpose, regional climate model RegCM3 and chemistry transport model CAMx has been coupled offline with one- and two-way interaction. Our work represents a first attempt to connect RegCM3 not only with CAMx, but with any other chemistry transport model. As a first step, an offline one way couple of RegCM3 and CAMx has been developed, meaning that the climate model drives the transport, emission, chemical transformation and deposition of species while the radiative feedbacks of gases and aerosols are not considered. A meteorological interface has been developed at our department in order to convert the meteorological data generated by RegCM3 to fields required by CAMx. For those parameters that are essential for CAMx but the regional climate model does not supply them, diagnostic methods were implemented into this interface. Further, it is used to calculate biogenic emissions. Regarding anthropogenic emissions, a simple utility has been developed to...
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