Ground-based zenith photometric observations at S¿o Jo¿o do Cariri (7¿S, 37¿W), Brazil, reveal the existence of ~25--40% quasi-3-day oscillations in OI(5577¿), O2(0,1), and OH (6,2) emissions and upper mesospheric temperatures (~6K) during June and July, 1998. A previous numerical model study <Forbes, 2000> has reported on the global characteristics of a 3-day Kelvin wave with zonal wavenumber s = 1, and consistency with satellite and radar observations. Herein we present the results of a one-dimensional dynamical-chemical simulation that demonstrates that the photometric observations are consistent with a Kelvin wave interpretation. Thus, a connection is made for the first time between convective processes in the tropical troposphere, and upper atmospheric airglow emissions.