A recent study by Shao, Lay and Jacobson (Nature-Geoscience, 6, 2013) shows that lightning flashes in a small thunderstorm reduces electron density in the nighttime ionospheric D-region. This plot shows a snapshot of the affected D-region electron density profiles atop the storm, at a time when the underlying storm was at its most lightning active stage. The rainbow colors represent electron densities in a logarithmic scale, as shown by the color bar.
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