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Changes in atmospheric circulation in Central Europe and their influence on climate in the Czech Republic
Cahynová, Monika ; Huth, Radan
This work is concerned with the influence of changes of atmospheric circulation (represented by the Hess-Brezowsky and Brádka’s subjective catalogues of synoptic types) on observed linear trends of 11 climatic elements from 21 stations in the Czech Republic in the period 1961-1998. The ratio of "hypothetical" (caused only by changes in the frequency of synoptic types) and observed trends shows that changes in atmospheric circulation are the primary cause of massive winter warming, and autumn cooling connected with increasing precipitation and humidity. In spring and summer, the influence is insignificant except for precipitation, relative humidity and cloudiness changes that are related to trends in the Hess-Brezowsky catalogue, mostly in spring.
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North Atlantic Oscillation - definitions, manifestations, influence on European climate
Huth, Radan
The paper reviews basic knowledge on the North Atlantic Oscillation (NAO), including its manifestations in the atmospheric pressure and geopotential height fields, definitions, methods of detection, effects on surface climate elements (temperature, precipitation) mainly in Europe, connections to phenological phases of some plant species, and relationships with solar activity.
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The heat-stress-related mortality in the Czech Republic: first results
Kyselý, Jan ; Huth, Radan ; Kříž, B.
The analysis of the HSR mortality in the Czech Republic tries to find answers to the following questions: (i) which treshold value of tempereture (or of another temperature- and humidity- related variable)must be exceeded to observe the HSR mortality, in dependence on time of the year; (ii) which meteorological variable (or an index) accounts for the largest portion of the mortality increase, and what is the best model between meteorological variables and mortality; (iii) what is the dependence of the HSR mortality on the age group and sex; and (iv) whether a synoptic approach based on an objective classification of air masses leads to better results compared to the more traditional methods. The analysis covers the 1990s when some extremely hot summers appeared in the Czech Republic.
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Research on possible climate change impacts
Huth, Radan ; Dubrovský, Martin ; Žalud, Z. ; Šťastná, M. ; Trnka, M. ; Hejzlar, Josef ; Buchtele, Josef ; Růžička, Martin ; Kalvová, J. ; Nemešová, Ivana
Brief information about the projects on climate change impact research running at the Academy of Sciences. Their common part is the construction of climate change scenarios for experimental sites.
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