Computation of the heat function connected with short-wave radiation fluxes     

Stanislav Brandejs  Reviewer Jaroslav Picha 《Studia Geophysica et Geodaetica》1973,17(2):144-148

Summary A report is presented on the use of the method, suggested by H. and K. Lettau, for the purposes of computing short-wave radiation fluxes and the heat function, connected with them, in atmospheric models, used for short-range numerical weather forecasting.Dedicated to 90th Birthday of Professor Frantiek Fiala  相似文献   

Daily variations of the characteristics of beating-typePc3 (Bpc3) pulsations     

Jaroslav Střeštík  Karel Prikner  Karel Dobeš  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1973,17(1):27-35

Summary The spectra of nearly 100 samples of Bpc3 pulsations were computed in the X and Y components of data from the Budkov Observatory. These spectra were used to study the daily variations of the fundamental characteristics of the pulsations, the frequency f ₀ and amplitude A ₀ of the main spectral peaks. The daily variation of the ellipticity of the polarization ellipses of oscillations in frequency f ₀ was also studied in the XY-plane.Part of these results was reported at the XVth General Assembly of the IUGG, Moscow, August 1971.  相似文献   

Properties of spectra of geomagneticpi2 pulsations recorded at the budkov observatory     

Jaroslav Střeštík 《Studia Geophysica et Geodaetica》1969,13(1):42-59

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Comparison of data on geomagnetic pulsations recorded by various instruments     

Jaroslav Střeštík 《Studia Geophysica et Geodaetica》1969,13(3):293-307

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Spectral analysis of geomagneticPc3 pulsations recorded at the observatories of Budkov and Belsk     

Jaroslav Střeštík  Karel Prikner  Reviewer M. Hooždara 《Studia Geophysica et Geodaetica》1977,21(2):159-167

Summary The numerical method of Fourier's spectral analysis is used to treat 29 pairs of samples of pc3 pulsations recorded at the observatories of Budkov (Czechoslovakia) and Belsk (Poland). The amplitude, frequency and phase characteristics of their spectra are compared. The polarization characteristics of the spectral frequency components of pulsations recorded at both observatories are compared in a quasi-stationary approximation of a plane oscillation.  相似文献   

Two-component spectral analysis of geomagneticpi2 pulsations     

Jaroslav Střeštík  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1977,21(1):58-69

Summary The method of two-component spectral analysis is described in two versions: as the so-called static analysis, in which the pulsation sample being studied is treated as a whole, and as the dynamic analysis, in which the given sample is processed piecewise in order to determine the time variations of various parameters. Both versions were applied to geomagnetic pi2 pulsations. The pi2 oscillations are resolved into several frequency components. The properties of these components are studied in dependence on the frequency and local time. The time variation of the amplitude (attenuation) and the polarization characteristics (precession) of pi2's are also studied.  相似文献   

Geochemistry and origin of volcanic rocks of the Andes (26°–28°S)     

Jaroslav Dostal  Marcos Zentilli  Juan C. Caelles  Alan H. Clark 《Contributions to Mineralogy and Petrology》1977,63(2):113-128

Mesozoic to Recent volcanic rocks from a transect of the Central Andes between latitudes 26 ° and 28 ° South in northern Chile and Argentina show chemical and temporal zonation with respect to the Peru-Chile trench. Jurassic to Eocene lavas occur closer to the trench and are comparable to calc-alkaline rocks of island arcs. Eastwards they are followed by Miocene to Quaternary sequences of typical continental margin calc-alkaline rocks which have higher contents of K, Rb, Sr, Ba, Zr, and REE and also higher K/Na and La/Yb ratios. The rocks occurring farthest from the trench have shoshonitic affinities. The distribution of major and trace elements is consistent with a model in which magmas were derived by anatexis of an upper mantle source already enriched in LILE and located above the descending oceanic slab. It is suggested that the chemical variations across the volcanic belt reflect systematic changes in the composition of the magmas due to a decreasing degree of partial melting with increasing depth, and probably also due to the heterogeneity of the source materials.  相似文献   

Spectra and polarization characteristics of geomagneticPc4 pulsations recorded at field station štrkovec     

Střeštík  Jaroslav  Tobyášová  Marta  Hvoždara  M. 《Studia Geophysica et Geodaetica》1983,27(3):248-256

ama nm u nmam nuau aamumuuaum nau muna Pc4 n ¶rt;a u mauu m, a¶rt; a m m anam ¶rt;u amu u¶rt;a umu. n¶rt;a auum nu¶rt;a u anum¶rt; nau u u nuau aamumu mu ¶rt; u m aum amumu, u au uu m¶rt; naam. mam auam mamau amu nau Pc3 u Pi2 n ¶rt;a u mau ¶rt; u u.  相似文献   

The effect of ordered vertical velocities and of the Earth's surface on the trajectories of particles of polluted air in the atmosphere     

Jan Bednář  Jaroslav Krabec  Ladislav Hrtoň  Reviewer Z. Jaňour 《Studia Geophysica et Geodaetica》1982,26(3):300-307

Summary The possibilities of improving of the construction of trajectories of air particles polluted by antropogeneous admixtures are discussed. With this in view attention is devoted to the ordered vertical velocities of dynamic origin and a simple method of approximate construction of the trajectories in the boundary layer of the atmosphere, where the flow is markedly affected by the Earth's surface, is discussed.  相似文献   

The origin of garnet-cordierite-sillimanite bearing rocks from Chandos Township,Ontario     

Jaroslav Dostal 《Contributions to Mineralogy and Petrology》1975,49(2):163-175

Garnet-cordierite-sillimanite bearing rocks from the contact aureole of the Precambrian Loon Lake pluton in Chandos Township, southeastern Ontario were analyzed for the major and rare-earth elements. In comparison with the associated Apsley biotite gneisses, they are rich in Al, Mg, and Fe, low in Si, Na, and K and their REE distribution patterns show a depletion of light REE with a negative Eu anomaly. These rocks are probably residuum left after partial melting of biotite gneiss. Leucogranite associated with the GCS rocks may represent the extracted anatectic material. It is suggested that some of the garnet cordierite-sillimanite gneisses which frequently occur in high-grade regionally metamorphosed areas of the Grenville Province of the Canadian Shield may also be of a similar residual origin as proposed by Lal and Moorhouse (1969).  相似文献