Figure 2From: Electron excitation and energy transfer rates for H2O in the upper atmosphereElectron flux spectrum. Electron flux (eV-1cm-2s-1) as a function of electron energy (eV), as used in our calculation of the excitation rates. The respective altitudes for each secondary electron distribution are: (―) 80 km, (— — —) 130 km, (- - -) 350 km.Back to article page