Results 161 to 170 of about 254,598 (203)
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Variation of Conductivity of the Upper Atmosphere
Nature, 1929MEASUREMENTS of the height of the base of the aurora in northern Norway by C. Stormer (Geofys. Publ., I., No. 5) and by L. Vegard and O. Krogness (Geofys. Publ., I., No. 1) show that a considerable number of the bases are situated at heights of about 100 km. and about 106 km. (compare the frequency curve, Fig. 18, Geofys. Publ., I., No. 1, p. 101).
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The control of the electrical conductivity of the lower atmosphere
Archiv für Meteorologie, Geophysik und Bioklimatologie Serie A, 1950The electrical conductivity of the atmosphere at any part of the earth's surface depends on the local concentration of small ions. This in turn depends 1. on their rate of production and 2. on their rate of removal. The removal is due principally to attachment to condensation nuclei.
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Errors in the gerdien measurement of atmospheric electric conductivity
Meteorology and Atmospheric Physics, 1991The measurement of conductivity has been an essential part of most atmospheric electricity research programs during the past century. This measurement is known to be vulnerable to a variety of potentially significant errors which can be separated into those resulting from diffusion of ions and those produced by electrical forces.
R. V. Anderson, J. C. Bailey, H. Tammet
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The electrical conductivity of the atmosphere over the Pacific Ocean
Eos, Transactions American Geophysical Union, 1953The electrical conductivity of the atmosphere was measured over the Pacific Ocean. The measurements were made at altitudes of 3.8, 5.2 and 6 4 km and between geomagnetic latitudes of 22 and 45°N. The value of q computed from the measured conductivity values agrees very well with those derived from cosmic‐ray data.
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THE VARIATION OF THE ELECTRICAL CONDUCTIVITY OF THE ATMOSPHERE WITH HEIGHT
Canadian Journal of Research, 1938The conductivity of the atmosphere has been measured during flights in aeroplanes near ground level and up to about 16,000 ft. Seven flights were made during the autumn and winter of 1936–1937. The Gerdien type of conductivity apparatus was used. An attempt was also made to measure potential gradients by the radioactive collector method.
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The effect of aerosols on the electrical conductivity in the atmosphere
Geofisica pura e applicata, 1961The value of the electrical conductivity of the free atmosphere is inversely related to the concentration of nuclei. Measurements made with an airborne conductivity meter illustrates this effect. It was found that for these particular meteorological conditions a change of 47 nuclei/cm3 could be detected. It was also found that in one case nuclei from a
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Influence of atmospheric pollutants on the conductance of phthalocyanine films
Sensors and Actuators B: Chemical, 1999Abstract Molecular oxygen has always been considered as the main gaseous agent responsible for the doping of intrinsically insulating phthalocyanine thin films. In this paper, it is shown that oxygen has only a relatively minor effect on electrical conductance and that traces (
A. de Haan, M. Debliquy, A. Decroly
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Influence of Atmospheric Annealing on the Conductivity of Mn-Doped PZT Ceramics
Key Engineering Materials, 2010Conductivity measurements were carried out on Mn-doped PZT ceramics in order to investigate the changes in defect chemistry with annealing, by identifying the charge carriers such as lead or oxygen vacancies. PZT compositions were prepared by sol-gel method in rhombohedral region Pb(Zr0.56 Ti0.44)O3 with Mn contents 0.4, 0.8, 1.5 and 2 wt.%. Nano-sized
Shuaib, M., Hall, D. A.
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Advances in Space Research, 1996
Abstract We have considered an operation of the planetary electric generator taking into account the altitude variation of the atmospheric conductivity under the global fair-weather condition. Distributions of electric potential, current density and charge density inside the planet, in the atmosphere and magnetosphere have been determined. As applied
P.A. Bespalov +2 more
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Abstract We have considered an operation of the planetary electric generator taking into account the altitude variation of the atmospheric conductivity under the global fair-weather condition. Distributions of electric potential, current density and charge density inside the planet, in the atmosphere and magnetosphere have been determined. As applied
P.A. Bespalov +2 more
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Caustics of waves in the thermally conducting, viscous atmosphere
The Journal of the Acoustical Society of America, 2017This paper considers waves in the atmospheric as linear acoustic-gravity waves, in which fluid’s buoyancy and compressibility simultaneously serve as restoring forces. Atmosphere is modeled as an inhomogeneous, moving fluid with nearly horizontal winds and gradual variation of its composition, sound speed and wind velocity having representative spatial
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