Common-volume measurement of sporadic sodium layer, sporadic E layer, and auroral ionization allow unique framework for evaluating E region dynamics
Tested theories of sporadic sodium formation, results support the metallic ion neutralization mechanism
Reduction in sodium density found to be causally related to auroral ionization.
Heinselman, C.J., J.P. Thayer, and B.J. Watkins, “A high-latitude observation of sporadic sodium and sporadic E layer formation,” Geophys. Res. Lett. Vol. 25 , No. 16 , p. 3059, 1998.
Heinselman, C.J., "Auroral effects on the gas phase chemistry of meteoric sodium", J. Geophys. Res., 105, D10, pp. 12181–12192, 2000.