Abstract
A transmission line analogy, which has been used earlier in a linear theory for the development of equatorial plasma bubbles, is extended to study the effect of E region conductivity on non‐linear evolution of the plasma bubbles. For this, a set of mode coupling equations are used to describe non‐linear development of equatorial plasma bubbles in the presence of field‐aligned currents which couple the equatorial F region with conjugate E regions. For a three mode system, these non‐linear equations yield a condition for unstable fixed states. This condition shows that E region resistivity together with F region polariz‐ability introduces another time scale in the non‐linear evolution of equatorial bubbles, and this is the time scale for discharging the bubbles.
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