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  • Artikel  (7)
  • Forschungsdaten
  • Atmospheric electricity  (7)
  • 1980-1984  (7)
  • Geologie und Paläontologie  (7)
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  • Artikel  (7)
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  • Geologie und Paläontologie  (7)
  • Physik  (7)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Pure and applied geophysics 119 (1980), S. 31-45 
    ISSN: 1420-9136
    Schlagwort(e): Atmospheric electricity ; Theoretical solution ; Wintertime observations
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Summary The steady-state equations of the atmospheric electrode effect, i.e. the depletion of negative ions near the ground, are solved analytically in an approximate way. The presence of monodisperse aerosol is included. The method is based on the assumption that the positive ion density remains nearly, although not strictly, constant with height. The results show explicitly the effect of various parameters on the electrode layer. In particular, the height is directly proportional to the current density, and it depends on aerosol density only through the influence of the aerosol on the current density. The results are used to give a tentative explanation, in terms of the electrode effect, to an observed wintertime difference of the two polar conductivities.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Pure and applied geophysics 120 (1982), S. 682-690 
    ISSN: 1420-9136
    Schlagwort(e): Atmospheric electricity ; Atmospheric electric potential gradient
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Atmospheric electric potential gradient measurments were made near the ground at Vishakapatnam (17°42′N, 83°18′E). The diurnal variation of potential gradient during fair weather has been studied. The characteristic pattern of potential gradient in different months, different seasons and its annual variation are examined.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Pure and applied geophysics 118 (1980), S. 753-764 
    ISSN: 1420-9136
    Schlagwort(e): Atmospheric electricity ; Point discharge ; Rain current
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The characteristics of rain and point charges based on routine measurements extending over four rainy seasons are presented. An average rain current density of (1.0±0.1)×10−10 A m−2 and charge per unit volume of rain water of (0.43±0.02)×10−4 C m−3 for the locality are obtained, which are compared with data obtained elsewhere by other workers. The point-discharge current measurements lead to a revised estimate of (0.86±0.08)×10−9 A m−2 for the average point discharge current below storm clouds.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Pure and applied geophysics 120 (1982), S. 673-681 
    ISSN: 1420-9136
    Schlagwort(e): Atmospheric electricity ; Neutral droplets ; Tropical meteorology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract Streamers were injected into a large population of small droplets, of radii about 20 μm, confined to a given region of pre-determined shape on a photographic film, and situated in a gap between which a variable electric field can be applied. Results showed that the droplet region behaves like a dipole discharging from both ends if its inclination to the electric field is less than 45° and the field is not less than −230 kV/m at atmospheric pressure. We deduced that streamer intensification will occur at relatively low fields if there exists pockets of large number density of small droplets.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Pure and applied geophysics 120 (1982), S. 691-697 
    ISSN: 1420-9136
    Schlagwort(e): Atmospheric electricity ; Ions ; Wind representation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract A recently developed data presentation technique, the rectangular wind frequency isopleth diagram, has been applied to examine the effect of wind speed and direction, acting simultaneously, on ambient air negative ion densities. The large negative ion concentration decreases in the majority of directions and wind speed intervals, while that of the small ions increases, as the wind speed increases. The local maxima and minima, occurring in some sectors, are properly discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Pure and applied geophysics 120 (1982), S. 108-116 
    ISSN: 1420-9136
    Schlagwort(e): Atmospheric electricity ; Fair weather electric field ; Effect of pollution on potential gradient in atmosphere
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The measurement and monitoring of atmospheric pollutants is an important aspect of pollution studies. A novel method of assessment of the level of pollution in the atmosphere is conceived using point discharge and potential gradients. The present paper is an attempt to show that measurement of the point discharge current (PDC) and potential gradient (PG) can be used to provide information regarding the nature of charges and level of pollution in the atmosphere. The measurement of the PDC and PG in different localities is presented and discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Pure and applied geophysics 120 (1982), S. 123-135 
    ISSN: 1420-9136
    Schlagwort(e): Tropical meteorology ; Atmospheric electricity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The results of atmospheric electric measurements over a twenty year period (1961–1980) are reviewed for Ibadan situated in the tropical rain forest of Nigeria. The aim is to present the data in an easily accessible form.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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