A comparison of measurements of O2(1delta) airglow from SPICAM instrument on Mars Express with calculations from GM3

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6005 Atmospheres (1060), 6008 Composition (1060), 6009 Aurorae, Airglow, And X-Ray Emission

Scientific paper

GM3 is a multiscale global Mars general circulation model with a vertical domain from the surface to about 160 km. It has a water cycle that includes covered ice cap and regolith as well as bulk ice clouds. The model also includes a COx, Ox, and HOx chemistry of the Martian atmosphere, with a focus on airglow as a means of evaluating the chemistry and dynamics of the model. In this case we focus on the O2(1delta) airglow and its sources, photolysis of O3 and O self recombination together with its sinks of emission and quenching. We find large values of O2(1delta) from O recombination in the polar night with the descent of O rich air from the thermosphere. Our model simulation of O2(1delta) is compared with available measurement from the Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars (SPICAM) instrument onboard the Mars Express orbiter.

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