Ocean Induced Climate Change. These pulses are assumed to result from the formation of an ocean due to volcanic activity as described by Baker et al. Figure taken from Gulick et al. Quasi-Periodic Climate Change. Annual average insolation at the top of the atmosphere for several different obliquities as a function of latitude.
Calculations assume present day solar luminosity and Mars eccentricity.
From Fanale et al. Atmospheric pressure as a function of obliquity as predicted by the model of Fanale et al. Cartoon of the conditions on Mars at the extremes of obliquity. Issues Regarding Q-P Climate Change.