the pedersen current carried by electrons: a non-linear response of the ionosphere to magnetospheric forcing
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ID: 177346
2008
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Abstract
Observations by the EISCAT Svalbard radar show that electron
temperatures Te in the cusp electrojet reach up to about 4000 K.
The heat is tapped and converted from plasma convection in the near
Earth space by a Pedersen current that is carried by electrons due
to the presence of irregularities and their demagnetising effect.
The heat is transfered to the neutral gas by collisions. In order
to enhance Te to such high temperatures the maximally possible
dissipation at 50% demagnetisation must nearly be reached. The
effective Pedersen conductances are found to be enhanced by up to
60% compared to classical values. Conductivities and conductances
respond significantly to variations of the electric field strength
E, and "Ohm's law" for the ionosphere becomes non-linear for
large E.
| Reference Key |
buchert2008annalesthe
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|---|---|
| Authors | ;S. C. Buchert;T. Tsuda;R. Fujii;S. Nozawa |
| Journal | journal of food measurement and characterization |
| Year | 2008 |
| DOI |
10.5194/angeo-26-2837-2008
|
| URL | |
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