Climate Simulations Of Mars At Low Obliquity
L.Lange, F.Forget, R.Vandemeulebrouck, E.Millour, A.Spiga, A.Bierjon, A.Delavois, J.Naar, Laboratoire De
Météorologie Dynamique, Institut Pierre-Simon Laplace (Lmd/Ipsl), Sorbonne Université, Centre National De
La Recherche Scientifique (Cnrs), École Polytechnique, École Normale Supérieure (Ens), Paris, France
Lucas.Lange@Lmd.Ipsl.Fr

Introduction:
In Some High Latitude Craters, Intriguing Moraines
Are Interpreted To Have Been Formed By By Co2 Ice
Glacier Flows [1]. These Glaciers Might When Mars
Obliquity Was Low And The Local Climate Was Colder
[1]. The Obliquity Of Mars Mars Obliquity Reached
Values ~15° Nearly 800,000 Years Ago , And Probably
Less Than A Few Degrees During The Amazonian Era
[2]. The Climate Of Mars At Such Low Obliquities Has
Been Little Studied, But It Suggests That The Atmosphere Could Totally Collapse Into Co2 Glaciers,
Leaving Behind A Residual Atmosphere Of Only Ar And
N2, But 20 Times Less Dense Than Today [3,4,5]. We
Present Here Preliminary Results Of Our Climate Simulations Of Mars At Low Obliquity Using The Lmd
Mars Global Climate Model [6].