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Figure 9

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Irradiation moyenne annuelle au sommet de l’atmosphère selon l’obliquité et la latitude d’une planète à orbite circulaire (excentricité = 0); adaptée de Linsenmeier et al. (2015). Valeurs exprimées en fraction du rayonnement solaire incident moyen global. Le trait vertical tireté indique l’obliquité « critique » de 54°. Les planètes telluriques du système solaire (avec Pluton) ont été ajoutées à titre de comparaison, selon leur obliquité et indépendamment de leur excentricité. Annual and zonal mean irradiation at the top of the atmosphere depending on obliquity and latitude of a planet with a circular orbit (eccentricity = 0); modified from Linsenmeier et al. (2015). The values are expressed in fractions of the global average insolation (incident solar radiation). The vertical dashed line shows the “critical” obliquity of 54°. The rocky planets of the solar system (including Pluto) were added as comparison, according to their obliquity and independently of their eccentricity.

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