No (138)
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Lengths of grapewine sprouts, air temperatures and heliogeophysical factors from the point of view of chronobiology
Střeštík, Jaroslav; Mikulecký, M.
2002 - Czech
Series of sunspot numbers, indices of geomagnetic activity, mean air temperature in April and grapewine lengths measured to the 24th April were processed by power spectra and mutual coherences. Whereas spectra of sunspot numbers exhibit a pronounced peak at 11 yr, in spectra of other quantities more significant peaks occur. Řady Wolfových čísel slunečních skvrn, indexů geomagnetické aktivity, průměrných dubnových teplot vzduchu a délek letorostů vinné révy k 24. dubnu byly zpracovány metodou výpočtu powerspekter a vzájemných koherencí. Zatímco u Wolfových čísel dalece převládá perioda kolem 11 let, u dalších veličin je celá řada významných vrcholů ve spektru.
Keywords:
sunspot numbers; geomagnetic activity; grapewine lengths
Available at various institutes of the ASCR
Lengths of grapewine sprouts, air temperatures and heliogeophysical factors from the point of view of chronobiology
Series of sunspot numbers, indices of geomagnetic activity, mean air temperature in April and grapewine lengths measured to the 24th April were processed by power spectra and mutual coherences. ...
Solar and geomagnetic activity effects on wind fields in the Northern hemisphere winter lower troposhere
Bochníček, Josef; Hejda, Pavel
2002 - Czech
The magnitude and prevailing direction of winds in the lower troposphere were analysed in the Northern hemisphere in the winter periods of the years 1964, 1967-1969, 1971-2001. Composite maps of those winds showed marked differences, in particular between the maps in which both activities were simultaneously low or high. Byla vyšetřována souvislost mezi chováním sluneční a geomagnetické aktivity a chováním větrných polí dolní troposféry severní polokoule v průběhu zimních období let 1964, 1967-1969, 1971-2001. Souvislost byla analyzována prostřednictvím kompozitních map větrných polí. Ukázalo se, že tyto mapy, v nichž jsou obě aktivity současně nízké nebo vysoké, vykazují největší vzájemné rozdíly.
Keywords:
solar activity; geomagnetic activity; lower troposhere
Available at various institutes of the ASCR
Solar and geomagnetic activity effects on wind fields in the Northern hemisphere winter lower troposhere
The magnitude and prevailing direction of winds in the lower troposphere were analysed in the Northern hemisphere in the winter periods of the years 1964, 1967-1969, 1971-2001. Composite maps of those ...
Precipitation totals and average flows in the river Vltava during two centuries
Střeštík, Jaroslav
2002 - Czech
Precipitation series exhibit neither apparent periodicity nor systematic long-term change. Precipitation totals increase a little in summer and decrease in winter. A big noise level supplements these changes. Annual and seasonal average flows in rivers exhibit no periodicity but a weak long-term increase is observed. Většina prací pojednávajících o dlouhodobé klimatické změně se zaměřuje převážně na teplotu vzduchu, přesněji na dlouhodobou změnu průměrné denní teploty. Zde je opravdu dlouhodobá změna nápadná. Teploty zhruba od r. 1860 do dneška stále stoupají. Ale interpretace vzrůstu teplot za poslední století není jednoznačná, vzrůst lze interpretovat jako přirozené kolísání s periodou 200 let.
Keywords:
precipitation series; average flows; climatic change
Available at various institutes of the ASCR
Precipitation totals and average flows in the river Vltava during two centuries
Precipitation series exhibit neither apparent periodicity nor systematic long-term change. Precipitation totals increase a little in summer and decrease in winter. A big noise level supplements these ...
Magnetic susceptibility of peat-bogs as indicator of immissions in Czech and Polish parts of the Giant Mountains
Kapička, Aleš; Strzyszcz, Z.; Magiera, T.; Petrovský, Eduard
2001 - Czech
Recently, rapid and inexpensive (proxy) methods of outlining areas exposed to increased pollution by atmospheric particulates of industrial origin have been developed by scientists in various fields. One of them, soil magnetometry, seems to be a suitable tool, at least in some cases. This method is based on the knowledge that ferrimagnetic particles are deposited in top soil layers. Rychlé a relativně levné metody pro stanovení kontaminace půd pevným průmyslovým spadem jsou hledány v poslední době na řadě pracovišť. Jedna z nich - magnetometrie půd se jeví jako perspektivní. Je založena na faktu, že ferrimagnetické částice antropogenního původu jsou ukládány a akumulovány ve svrchních vrstvách půd a sedimentů.
Keywords:
magnetic susceptibility; peat bogs; immissions; Giant Mountains
Available at various institutes of the ASCR
Magnetic susceptibility of peat-bogs as indicator of immissions in Czech and Polish parts of the Giant Mountains
Recently, rapid and inexpensive (proxy) methods of outlining areas exposed to increased pollution by atmospheric particulates of industrial origin have been developed by scientists in various fields. ...
Solar-geomagnetic activity and weather changes. Observation results
Bochníček, Josef; Hejda, Pavel; Pýcha, Josef
2001 - Czech
The impact of solar and geomagnetic activity on pressure and temperature changes in the winter lower troposphere was investigated. It was found that although correlations between solar and geomagnetic activity in individual winter periods are weak, the pressure and temperature changes show similar magnitudes. Byl vyšetřován vliv sluneční a geomagnetické aktivity na změny tlaku a teploty zimní dolní troposféry, a to v průběhu let 1952-1999. Ukázalo se, že i když v jednotlivých zimních obdobích úroveň geomagnetické aktivity korelovala s úrovní sluneční aktivity velmi slabě, amplitudy tlakových a teplotních změn byly obdobné.
Keywords:
solar-geomagnetic activity; weather changes; observation results
Available at various institutes of the ASCR
Solar-geomagnetic activity and weather changes. Observation results
The impact of solar and geomagnetic activity on pressure and temperature changes in the winter lower troposphere was investigated. It was found that although correlations between solar and geomagnetic ...
Reconstruction of spring air temperatures in the 18th century based on the lengths of grapewine sprouts
Střeštík, Jaroslav; Verö, J.
2001 - Czech
Lengths of new grapewine sprouts measured in Köszeg, Hungary, since 1740, exhibit a good correlation with the average temperatures in April, even better for temperatures squared. There is also a weak correlation with the relative air humidity, and no correlation with solar activity. V tomto příspěvku budeme vycházet z měřených délek letorostů vinné révy. Data pocházejí z městečka Köszeg v západním Maďarsku nedaleko rakouských hranic, kde maďarská nížina přechází v kopcovitý terén.
Keywords:
spring air temperatures; grapewine sprouts; Hungary; 18th century
Available at various institutes of the ASCR
Reconstruction of spring air temperatures in the 18th century based on the lengths of grapewine sprouts
Lengths of new grapewine sprouts measured in Köszeg, Hungary, since 1740, exhibit a good correlation with the average temperatures in April, even better for temperatures squared. There is also a weak ...
Solar-geomagnetic activity and weather changes. The mechanisms
Pýcha, Josef; Bochníček, Josef; Hejda, Pavel
2001 - Czech
The mechanisms in the paper described were based on the ideas enabling to explain the observed associations between the short-term changes in solar/geomagnetic activity and short-term changes in the lower atmosphere pressure and temperature fields. Special attention was devoted to the role of planetary waves, electrostatic fields and various phases of the QBO. Práce popisuje mechanismy, pomocí nichž lze vysvětlit souvislost mezi krátkodobými změnami sluneční/geomagnetické aktivity a krátkodobými změnami tlakových a teplotních polí dolní atmosféry. Zvláštní pozornost byly věnována roli planetárních vln, elektrostatických polí a různých fází QBO,
Keywords:
solar-geomagnetic activity; weather changes; mechanisms
Available at various institutes of the ASCR
Solar-geomagnetic activity and weather changes. The mechanisms
The mechanisms in the paper described were based on the ideas enabling to explain the observed associations between the short-term changes in solar/geomagnetic activity and short-term changes in the ...
Further experiences with the validity of the biometeorological prediction for the whole Czech Republic
Sitar, J.; Střeštík, Jaroslav
2001 - Czech
The published biometeorological prediction displays an extremely low correlation with the number of patients with serious heart injury in Brno. The authors mean that this prediction should be prepared for each region separately and should not include only meteorological factors. Meteorologické a jiné vlivy na lidský organismus, na nemocnost, úrazovost apod. byly známy již dávno, ale teprve v posledních několika desetiletích bylo možné podchytit tyto zákonitosti číselně a zpracovat metodami matematické statistiky.
Keywords:
biometeorological prediction; Czech Republic; validity
Available at various institutes of the ASCR
Further experiences with the validity of the biometeorological prediction for the whole Czech Republic
The published biometeorological prediction displays an extremely low correlation with the number of patients with serious heart injury in Brno. The authors mean that this prediction should be prepared ...
Main sources of solar wind high-speed streams during solar minimum
Bochníček, Josef; Hejda, Pavel
2001 - Czech
Common analysis of solar wind (velocity, concentration, temperature) and solar soft X-ray images showed that during the solar minimum substantial majority of the solar wind high-speed streams found its source in the regions with attributes typical for coronal holes. Společná analýza slunečního větru (rychlost, hustota, teplota) a snímků slunečního disku pořízených v měkkém rentgenovém záření ukázala, že v době sluečního minima převážná většina vysokorychlostních proudů slunečního větru má svůj zdroj v oblastech, vyznačujících se atributy, které jsou typické pro koronální díry.
Keywords:
solar wind; solar minimum; high-speed streams; coronal holes
Available at various institutes of the ASCR
Main sources of solar wind high-speed streams during solar minimum
Common analysis of solar wind (velocity, concentration, temperature) and solar soft X-ray images showed that during the solar minimum substantial majority of the solar wind high-speed streams found ...
Physical plausibility of "Sun-weather" research
Bochníček, Josef; Hejda, Pavel; Pýcha, Josef
2001 - Czech
The paper deals with the importance of three basic objections against the existence of causal link between the changes of atmospheric fields in the lower troposphere. Příspěvek se zabývá oprávněností tří základních námitek vznášených proti existenci příčinného spojení mezi změnami sluneční činnosti a změnami atmosférických poli v dolní troposféře.
Keywords:
Sun-weather research; atmospheric fields; lower troposphere
Available at various institutes of the ASCR
Physical plausibility of "Sun-weather" research
The paper deals with the importance of three basic objections against the existence of causal link between the changes of atmospheric fields in the lower troposphere.
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