Temperature response of Mars to Milankovitch cycles
Article first published online: 23 SEP 2008
Copyright 2008 by the American Geophysical Union.
Geophysical Research Letters
Volume 35, Issue 18, September 2008
How to Cite
2008), Temperature response of Mars to Milankovitch cycles, Geophys. Res. Lett., 35, L18201, doi:10.1029/2008GL034954.(
- Issue published online: 23 SEP 2008
- Article first published online: 23 SEP 2008
- Manuscript Accepted: 14 AUG 2008
- Manuscript Received: 7 JUN 2008
- milankovitch theory
 On Mars annual mean surface temperature near ±60° latitude varies predominately with precession and is not closely related to annual mean insolation. Based on the last few million years of orbital history, the precession cycle dominates in a narrow latitude range 54°–65°, in which the margins of the two ice-rich permafrost layers in each hemisphere happen to lie, while mean annual temperature at other latitudes is controlled by the obliquity cycle. The phenomenon already exists on an airless uniform body in Mars orbit, where this latitude range shifts to 62°–74° on both hemispheres, and is closely related to temperature amplitude dependent reradiation into space.