Comparisons of spectrally resolved nightglow emission locally simulated with space and ground level observations
Résumé
11 A mesospheric model of the airglow emission is developed to recover the night variations observed 12 at ground level. The model is based on a 1D vertical photochemical model, including the photodis-13 sociation and heating processes. The spectral radiation is calculated at high altitude and propa-14 gated through the atmosphere to the ground. We also include short scale vertical dynamic such 15 as turbulences and the molecular diffusion. Simulations reveal realistic emissions when compared 16 with space observations. In addition, we estimate the impact of changes associated with parame-17 terized atmospheric tides. The comparison with observations is performed over high altitude and 18 ground level. We confront the model outputs at high altitude with satellite observations (SABER 19 and GOMOS) and the simulations propagated at ground level are compared to local measurements 20 campaigns performed in France and India. Biases between observed and simulated radiances and 21 volume emission rates are suspected to be due to the impact of gravity waves or the large scale 22 dynamic. 23
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