Wind resource assessment for selected sites in the territory of the Czech Republic
Hanslian, David
2015 - Czech
This set of studies analyses the wind conditions and expected wind power production at selected sites in the Czech Republic. At first, the calculation of wind conditions by VAS/WAsP 1, VAS/WAsP 2 and PIAP models is performed. Based on the comparison and analysis of model results, the generalized wind climate pertaining to the assessed site is estimated. The final results are calculated by WAsP model using this generalized wind climate. The expected wind power production of proposed wind turbine or wind farm is calculated as well as the map of simulated average wind speed and potential wind turbine production over the surrounding area. The uncertainty analysis is performed as well. This set consists of 6 partial reports. Jedná se o souhrn zpráv, analyzujících větrné podmínky a předpokládanou výrobu energie na vybraných lokalitách v České republice. Pro studované lokality byl proveden výpočet modely VAS/WAsP 1, VAS/WAsP 2 a PIAP. Jejich výsledky jsou navzájem porovnány a jsou analyzovány předpokládané chyby jednotlivých modelů. Na základě toho je sestaveno předpokládané zobecněné větrné klima v lokalitě, které slouží pro provedení finálních výpočtů modelem WAsP. Výsledkem je předpokládaná výroba energie větrnou elektrárnou či farmou větrných elektráren a mapa simulovaného prostorového rozložení průměrných rychlostí větru a výroby energie v okolí posuzované lokality. Součástí studie je též analýza nejistot dosažených výsledků. Souhrn sestává z 6 dílčích zpráv.
Keywords:
wind energy; wind resource assessment; Czech Republic; WAsP
Available at various institutes of the ASCR
Wind resource assessment for selected sites in the territory of the Czech Republic
This set of studies analyses the wind conditions and expected wind power production at selected sites in the Czech Republic. At first, the calculation of wind conditions by VAS/WAsP 1, VAS/WAsP 2 and ...
The spread of moisture from sources of Mondi SCP Inc. and its influence on the formation of rime and temperature inversion
Sokol, Zbyněk; Řezáčová, Daniela
2015 - Czech
This study presents the results of the evaluation heat and moisture emissions from the premises of Mondi SCP, Inc., Ruzomberok, and the impact of these emissions on selected climatic characteristics of the region. It focuses mainly on assessing the impact of emissions on the development of icing and temperature inversions. In addition to assessing the current status of emissions the objective of the study was to assess the impact of the modified emissions, which consisted in an increase in emissions of moisture in some sources as a result of the proposed production increase of Mondi. Předkládaná studie uvádí výsledky hodnocení rozsahu emisí vlhkosti a tepla z areálu firmy MONDI SCP, a.s., Ružomberok a vlivu těchto emisí na vybrané mikroklimatické charakteristiky oblasti. Zaměřuje se zejména na posouzení vlivu emisí na vývoj námrazy a teplotních inverzí. Kromě posouzení stávajícího stavu emisí bylo cílem studie i posouzení vlivu modifikovaného stavu emisí. Modifikace spočívala ve zvýšení emisí vlhkosti u některých zdrojů jako důsledek navrhovaného zvýšení produkce Mondi.
Keywords:
cooling tower; plume; model
Available at various institutes of the ASCR
The spread of moisture from sources of Mondi SCP Inc. and its influence on the formation of rime and temperature inversion
This study presents the results of the evaluation heat and moisture emissions from the premises of Mondi SCP, Inc., Ruzomberok, and the impact of these emissions on selected climatic characteristics ...
Comparision of devices for monitoring of the ionosphere at the observatory Průhonice
Beran, L.; Chmelař, P.; Rejfek, Luboš; Chum, Jaroslav; Mošna, Zbyšek
2015 - English
This document is about comparison of the methods ad systems for the measurement of the ionosphere used at the geophysical observatory Pruhonice (50N, 14.5E). Three systems for ionospheric monitoring are installed at the station. The first system for the monitoring of the ionosphere is Digisonde, the second system is countinuous Doppler sounding. Each system has its banefits and weaknesses which are compared in this paper.
Keywords:
digisonde; GNSS receiver; continuous Doppler sounding; ionosphere; Total Electron Content (TEC)
Available at various institutes of the ASCR
Comparision of devices for monitoring of the ionosphere at the observatory Průhonice
This document is about comparison of the methods ad systems for the measurement of the ionosphere used at the geophysical observatory Pruhonice (50N, 14.5E). Three systems for ionospheric monitoring ...
Drivers of soil moisture trends in the Czech Republic between 1961 and 2012
Trnka, M.; Brázdil, R.; Balek, J.; Semerádová, D.; Hlavinka, P.; Možný, M.; Štěpánek, P.; Dobrovolný, P.; Zahradníček, P.; Dubrovský, Martin; Eitzinger, J.; Fuchs, B.; Svoboda, M.; Hayes, M.; Žalud, Z.
2015 - English
Soil moisture dynamics and their temporal trends in the Czech Republic are forced by various drivers. Our analysis of temporal trends indicates that shifts in drought severity between 1961 and 2012 and especially in the April, May, and June period, which displayed such results as a 50% increase in drought probability during 1961–1980 in comparison to 2001–2012. We found that increased global radiation and air temperature together with decreased relative humidity (all statistically significant at p < 0.05) led to increases in the reference evapotranspiration in all months of the growing season; this trend was particularly evident in April, May, and August, when more than 80% of the territory displayed an increased demand for soil water. These changes, in combination with the earlier end of snow cover and the earlier start of the growing season (up to 20 days in some regions), led to increased actual evapotranspiration at the start of the growing season that tended to deplete the soil moisture earlier, leaving the soil more exposed to the impacts of rainfall variability. These results support concerns related to the potentially increased severity of drought events in Central Europe. The reported trend patterns are of particular importance with respect to expected climate change, given the robustness and consistency of the trends shown and the fact that they can be aligned with the existing climate model projections. Introduction
Keywords:
soil moisture; Czech Republic; climate change
Available at various institutes of the ASCR
Drivers of soil moisture trends in the Czech Republic between 1961 and 2012
Soil moisture dynamics and their temporal trends in the Czech Republic are forced by various drivers. Our analysis of temporal trends indicates that shifts in drought severity between 1961 and 2012 ...
Analysis of wind energy in the Czech Republic
Chalupa, Š.; Hanslian, David
2015 - Czech
The study summarizes the knowledge about wind energy potential in the Czech Republic and discusses various issues connected with its possible exploitation. Scenarios of future wind energy utilization are also included. Studie shrnuje poznatky o potenciálu větrné energie v České republice a diskutuje různé otázky související s možnostmi jeho využití. Výsledkem studie jsou mimo jiné scénáře budoucího rozvoje větrné energetiky.
Keywords:
wind energy; wind energy potential; realizable wind energy potential; Czech Republic
Available on request at various institutes of the ASCR
Analysis of wind energy in the Czech Republic
The study summarizes the knowledge about wind energy potential in the Czech Republic and discusses various issues connected with its possible exploitation. Scenarios of future wind energy utilization ...
The bahaviour of ionospheric drift during a superstorm in November 2004
Kouba, Daniel
2014 - Czech
This article presents results obtained by processing the measurement drift in the F layer of the ionosphere from the Pruhonice observatory.Diurnal and seasonal behaviour of the ionosphere is examined. The effect of strong geomagnetic storms on the ionosphere is presented. V tomto článku jsou prezentovány výsledky získané zpracováním driftových měření ve vrstvé F ionosféry ze stanice Průhonice. Tyto výsledky lze rozdělit do dvou částí - zkoumání pravidelného chování klidné ionosféry a demonstraci chování ionosféry během silné geomagnetické bouře. Za pravidelné chování lze považovat denní a sezónní variace i variace odpovídající slunečnímu cyklu. Chování ionosféry za klidných podmínek je důležité znát z důvodu studia vlivu vybraných událostí. Těmi mohou být geomagnetické bouře, zatmění Slunce, přechody výrazných meteorologických front apod. V článku jsou shrnuty některé výsledky popsané v disertační práci [Kouba, 2014]. Pokud bude známo chování driftů za klidných podmínek i během různých poruch ionosféry, bude v budoucnu možno realizovat i předpovědi dynamiky ionosférických vrstev.
Keywords:
ionospheric F-layer; geomagnetic storm; drift measurements
Available at various institutes of the ASCR
The bahaviour of ionospheric drift during a superstorm in November 2004
This article presents results obtained by processing the measurement drift in the F layer of the ionosphere from the Pruhonice observatory.Diurnal and seasonal behaviour of the ionosphere is examined. ...
The impact of plumes of cooling towers of Alpiq Generation (CZ) s.r.o. power station on visifility and frequency of ice on the territory of Václav Havel Airport Prague
Sokol, Zbyněk; Řezáčová, Daniela
2014 - Czech
The report contains an evaluation of the impact of cooling towers of the power plant Kladno on visibility and frequency of ice occurrence on the territory of Prague airport. Zpráva obsahuje vyhodnocení vlivu chladících věží elektrárny Kladno provozované firmou Alpiq Generation (CZ) s.r.o. na dohlednost a četnost námrazy a náledí na území letiště Václava Havla Praha.
Keywords:
cooling tower; plume; model
Available at various institutes of the ASCR
The impact of plumes of cooling towers of Alpiq Generation (CZ) s.r.o. power station on visifility and frequency of ice on the territory of Václav Havel Airport Prague
The report contains an evaluation of the impact of cooling towers of the power plant Kladno on visibility and frequency of ice occurrence on the territory of Prague airport.
Geomagnetická aktivita a její vliv na ionosféru
Mošna, Zbyšek; Koucká Knížová, Petra
2014 - Czech
Cl anek se zab yv a vazbou geomagnetick e aktivity na ionosf eru. Je pops an mechanismus pusoben poru sen eho meziplanetarního pole slune cn ho v etru na zemsk e magnetick e pole v r uzn ych oblastech (vysok e a n zk e s rky). V praktick e c asti jsou prezentov any v ysledky m e ren z vertik aln ho ionosf erick eho sondov an v obdob geomagneticky poru sen e situace z oblasti st redn ch s rek ze stanice Pr uhonice. Je uk az an pokles maxim aln elektronov e koncentrace a zm ena v y sek vrstvy F2.
Keywords:
ionosféra; geomagnetická aktivita
Available at various institutes of the ASCR
Geomagnetická aktivita a její vliv na ionosféru
Cl anek se zab yv a vazbou geomagnetick e aktivity na ionosf eru. Je pops an mechanismus pusoben poru sen eho meziplanetarního pole slune cn ho v etru na zemsk e magnetick e pole v r uzn ych ...
HF Doppler Radar Observations of Geomagnetic Pulsations
Fišer, Jiří; Chum, Jaroslav
2014 - English
Geomagnetic pulsations interact with the ionosphere, which influences the propagation properties of high frequency (HF) radio waves. In this work we present results of an experimental study focused on investigation of relations between the geomagnetic pulsations observed on the ground and the Doppler frequency shift oscillations observed remotely in the ionosphere by a Doppler sounding system in the Czech Republic. We study mainly the dependence of phase shift between them on various parameters.
Keywords:
Doppler sounding; ionosphere; geomagnetic pulsations
Available at various institutes of the ASCR
HF Doppler Radar Observations of Geomagnetic Pulsations
Geomagnetic pulsations interact with the ionosphere, which influences the propagation properties of high frequency (HF) radio waves. In this work we present results of an experimental study focused ...
Wind resource assessment for selected sites in the territory of the Czech Republic – first series
Hanslian, David
2014 - Czech
This set of studies analyses the wind conditions and expected wind power production at selected sites in the Czech Republic. At first, the calculation of wind conditions by VAS/WAsP 1, VAS/WAsP 2 and PIAP models is performed. Based on the comparison and analysis of model results, the generalized wind climate pertaining to the assessed site is estimated. The final results are calculated by WAsP model using this generalized wind climate. The expected wind power production of proposed wind turbine or wind farm is calculated as well as the map of simulated average wind speed and potential wind turbine production over the surrounding area. The uncertainty analysis is performed as well. This set consists of 7 partial reports. Jedná se o souhrn zpráv, analyzujících větrné podmínky a předpokládanou výrobu energie na vybraných lokalitách v České republice. Pro studované lokality byl proveden výpočet modely VAS/WAsP 1, VAS/WAsP 2 a PIAP. Jejich výsledky jsou navzájem porovnány a jsou analyzovány předpokládané chyby jednotlivých modelů. Na základě toho je sestaveno předpokládané zobecněné větrné klima v lokalitě, které slouží pro provedení finálních výpočtů modelem WAsP. Výsledkem je předpokládaná výroba energie větrnou elektrárnou či farmou větrných elektráren a mapa simulovaného prostorového rozložení průměrných rychlostí větru a výroby energie v okolí posuzované lokality. Součástí studie je též analýza nejistot dosažených výsledků. Souhrn sestává ze 7 dílčích zpráv. Počet stran: 17, 18, 17, 17, 17, 17, 16 + přílohy.
Keywords:
wind energy; wind resource assessment; Czech Republic; WAsP
Available at various institutes of the ASCR
Wind resource assessment for selected sites in the territory of the Czech Republic – first series
This set of studies analyses the wind conditions and expected wind power production at selected sites in the Czech Republic. At first, the calculation of wind conditions by VAS/WAsP 1, VAS/WAsP 2 and ...
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