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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 19 (1951), S. 151-158 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Evidence is adduced indicating that geomagnetic disturbance at Huancayo isnormal, that is, comparable with that shown elsewhere in similar latitudes —as contrasted with the remarkable Huancayoabnormality, in the horizontal magnetic force, of the quiet-day solar and lunar daily variations, and in theS q augmentation (solar flare effect). the normality of magnetic disturbance at Huancayo is manifested by the disturbance daily variationS D, and by the storm-effectD st and its associated changes of daily mean (D m) and the non-cyclic variation; it is not stated whether or not the irregular part,D i, is normal. The normality ofD st seems natural according to theChapman-Ferraro theory of magnetic storms, but the normality ofS D is less easy to explain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 59 (1964), S. 100-122 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A charged particle moves with velocityv in a constant non-uniform magnetic fieldH, spiralling with Larmor radiusR. IfR is small compared with the scale lengthL of the field, the magnetic moment associated with the Larmor motion of the particle is nearly constant. Consequently θ, the (‘pitch’) angle betweenv andH, varies as arcsinH 1/2. Hence θ in such adiabatic motion is approximately the same at points on the path whereH has the same value. But the magnetic moment and the pitch angle may differ materially at two such points, each in the region whereR/L is small, if between them the particle traverses a region whereR/L is not small. This region of non-adiabatic motion ‘scatters’ the pitch angles. Such scattering is investigated for regions of weak field (R large), with and without the presence of a neutral line along whichH=0. Either type of region, it is found, can scatter the pitch angles. This gives support to the theory proposed byAkasofu andChapman to explain why auroral arcs and bands are very thin. The scattering here examined is of interest also in connection with magnetic mirror devices for nuclear energy transformation. It may also have applications to phenomena of solar and stellar atmospheres.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archive for history of exact sciences 2 (1975), S. 41-51 
    ISSN: 1432-0657
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 4 (1951), S. 368-390 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Die außergewöhnlich große Amplitude der Tagesschwankung der Horizontal- (oder Nord-) Komponente der magnetischen Feldstärke über Huancayo (Peru) weist auf einen täglichen Anstieg und Abfall eines konzentrierten, nach Osten fließenden elektrischen Stromes oberhalb dieser Station hin, der der normalen Stromverteilung überlagert ist, auf die die magnetische TagesschwankungS q zurückgeführt werden muß. Für diesen konzentrierten Strom wird die Bezeichnung“Elektrostrahl” (electrojet) vorgeschlagen. Aus neuen Untersuchungen läßt sich das Auftreten des Elektrostrahls auch über Afrika und Indien nachweisen. Um Höhe, Intensität, Breite und Rückfluß des Elektrostrahles zu berechnen, ist es notwendig, die Abweichungen der Tagesschwankung der Vertikal- (und eventuell auch der Ost-) Komponente der Feldstärke an Stationen nördlich und südlich des Elektrostrahls zu bestimmen. Es wird gezeigt, daß vielleicht bereits der Tagesgang der VertikalintensitätZ in Bombay und Manila das Auftreten dieser Anomalie auch bei diesem Element bestätigt; die notwendigen Berechnungen zum Verständnis dieser neuen Ergebnisse werden durchgeführt.
    Abstract: Résumé L'amplitude anormalement grande de la variation diurne de la composante horizontale (ou nord) de l'intensité du champ magnétique à Huancayo (Pérou) semble indiquer l'augmentation et la diminution journalières d'un courant électrique concentré s'écoulant vers l'Est au-dessus de cette station et qui se superpose au courant normal auquel il faut attribuer la variation magnétique diurneS q. On propose pour ce courant concentré le nom de“jet électrique” (electrojet). De récentes recherches permettent de retrouver également ce jet électrique au-dessus de l'Afrique et de l'Inde. Pour déterminer l'altitude, l'intensité, la largeur et la branche de retour du jet électrique, il faut mesurer les écarts de la variation diurne de la composante verticale (et éventuellement de la composante Est) de l'intensité du champ en des stations situées au Nord et au Sud du jet. On montre que peut-être la marche diurne de l'intensité verticaleZ à Bombay et à Manille révèle déjà cette anomalie de cet élément; on effectue les calculs nécessaires à la comprèhension de ces nouveaux résultats.
    Notes: Summary The abnormally large range of the daily variation of the horizontal (or north) component of magnetic force over Huancayo in Peru indicates the daily rise and decline of a concentrated eastward electric current above that station, superposed on the normal current distribution responsible for the daily magnetic variationS q. The nameelectrojet is suggested for this concentrated current. New investigations indicate the occurrence of the electrojet also over Africa and India. To determine the height, intensity, width and return current flow of the electrojet, it is necessary to determine the abnormality in the daily range of the vertical (and perhaps also of the east) force, at stations north and south of the electrojet. It is suggested that the Bombay and Manila dailyZ variations already confirm the existence of the abnormality also in this element. Illustrative calculations are given that will be helpful in interpreting the proposed new data.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 68 (1967), S. 103-112 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The frequency distribution ofCp over its range 0 to 2.5 has been determined and is discussed for groups of days selected according to (a) calendar month and (b) season (D, E, J)—1932–1965 inclusive—and for each of eleven year-groups selected in various ways on the basis of the annual mean sunspot number. For each group the median, mean and root-mean-square value ofCp has been found. The results favor the equinoctial hypothesis for the semi-annual variation of geomagnetic disturbance.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 51 (1962), S. 147-154 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The atmospheres of the earth, the sun and other bodies are surrounded by gas that is nearly uniform in number densityn and kinetic temperatureT, over spaces much greater than those occupied by the atmospheres. This gas may be called theambium of the atmosphere. In total it is much more massive than the atmosphere it encloses. The conditions in the ambium must powerfully affect the state of the outer atmosphere. In particular, there must be a continuous transition of the values ofn andT between the ambium and the atmosphere. In the case of the earth, the sun and other hot stars, both the ambium and the outermost part of the atmosphere will consist of atomic hydrogen. The temperature of the ambium will determine whether this hydrogen and that of the outermost atmosphere are mainly ionized or neutral. The nature of the terrestrial ambium depends on the extension of the sun's atmosphere. This atmosphere is hot and highly ionized in its inner parts. At some radius not yet known, the solar atmospheric gas must become cool and neutral. The state of the earth's outermost atmosphere depends greatly on whether the earth lies in the ionized or the neutral part of the sun's atmosphere, or in the solar ambium. Evidence will be presented favoring the view that the earth's ambium consists of ionized solar atmospheric hydrogen. If this be so, the outermost part of the earth's atmosphere is likewise hot and ionized. It must enclose an extensive layer of mainly neutral atomic hydrogen.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 87 (1971), S. 93-101 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The eye readings of easterly declination at Trevandrum observatory have been analysed to determine solar and lunar daily vatiations. Hourly readings during February 1853 to February 1865 are analysed by Chapman-Miller method. The 8 values read at unequidistant day-time hours during March 1865 to December 1869 are analysed to compute the amplitude and phase of the semimonthly wave at each of the hours separately. The semi-monthly lunar wave obtained from the hourly readings shows a considerable night-time variation. A brief discussion of the results is also given.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Space science reviews 10 (1969), S. 3-188 
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 9
    Publication Date: 1969-10-01
    Print ISSN: 0038-6308
    Electronic ISSN: 1572-9672
    Topics: Physics
    Published by Springer
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  • 10
    Publication Date: 1951-08-01
    Print ISSN: 0177-7971
    Electronic ISSN: 1436-5065
    Topics: Geography , Physics
    Published by Springer
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