Fig. 4From: Dependence of mesospheric Na and Fe distributions on electron density at AreciboThis plot displays the temporal variation of column abundance of Ne (dashed-dotted, red), Fe (dashed line, blue), and Na (solid line). Note that the metal abundances are displayed on the left Y-axes while the right ordinate represents Ne values for the night of 17–18 March 2004 at AreciboBack to article page