Extended Data Fig. 1: Energy balance model schematic and model output comparison to data. | Nature Astronomy

Extended Data Fig. 1: Energy balance model schematic and model output comparison to data.

From: Coevolution of Mars’s atmosphere and massive south polar CO2 ice deposit

Extended Data Fig. 1

Left. Schematic of the energy balance model (Equation 1). Right. One-year model outputs with incoming flux (orange), outgoing flux (red dashed), and modelled accumulated CO2 (purple line), compared to observed accumulated CO2 (purple points; Kelly et al. (2006)43). LS is solar longitude. Apparent line-width of incoming flux is due to daily insolation oscillations, which are not resolved at plot resolution. The small fluctuations in the incoming flux curve are due to seasonal variations in the atmospheric opacity (Extended Data Fig. 3). Model runs for current orbit (obliquity = 25.19°, eccentricity = 0. 0934, longitude of perihelion = 251°). H2O layer thickness = 15 m. A. Latitude = 89.5°S, pressure = 1.0 × Peq,0, elevation = 4750 m, \({\it{\epsilon }}_{CO_2}\)= 0.8. B. Same, but with pressure = 0.95 × Peq,0, \({\it{\epsilon }}_{H_2O}\) = 1.0, \(A_{H_2O}\) = 0.4. C. Latitude = 89.5° N, pressure = 1.00 × Peq,0, elevation = −2000 m, \({\it{\epsilon }}_{CO_2}\)= 0.485, \({\it{\epsilon }}_{H_2O}\) = 0.55, \(A_{H_2O}\) = 0.4.

Back to article page