The Earth's Electrical Environment (1986) / Chapter Skim
Currently Skimming:
Pages 217-221
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 217... ...
possible variation due to solar influences. In fair weather the ground electric field varies owing to changes in columnar resistance, ionospheric potential, and the local electrical conductivity at the ground.
|
From page 218... ...
included an exponentially increasing conductivity variation with altitude and a latitudinal distribution that follows the latitudinal distribution of cosmic-ray ion production. It also included the coupling of thunderstorm currents flowing along geomagnetic-field lines into magnetic conjugate hemispheres.
|
From page 219... ...
Since the electrical conductivity along the geomagneticfield line is large, the magnetic potential is symmetric about the equator with no potential differences existing in the ionosphere between the feet of conjugate geomagnetic-field lines. The calculated potential differences along the 105-km constant-conductivity surfaces shown in Figure 15.11(a)
|
From page 220... ...
z= 25 90 1 1 1 1 1 ' I ~I ' I I I I . ~an _ _ - 1-~ ~\,:2///J 70 50 30 10 -10 -50 -70 l -90 stant-conductivity surface near 25 km, the potential difference pattern is different from that at 50 and 105 km, illustrating how the rapid increase of electrical conductivity alters the potential distribution in the upper atmosphere.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.