这篇论文在这里详细介绍了火星如何在其轴的摆动驱动的准周期性基础上经历自己的“冰河期”形式。所概述的主要机制是表面水冰的稳定性随倾角的增加而增加。这与地球相反,在高倾角时,极地夏季日照增加导致融化。有什么不同?
在对这个问题进行更多讨论的基础上,诸如冰反照率和其他反馈循环等因素是否会在火星的冰河期发挥与地球冰河期相似的作用?< / p >
I have also asked this at the Astronomy stack exchange here
On mars average temperatures even during summer are too low to allow for liquid water. Higher obliquity doesn't really lead to a melting of ice. It mainly increases sublimation thereby increasing the water content of the atmosphere also on lower latitudes. The water vapour freezes out and leads to ice shields extended to lower latitudes.
So in short, since temperatures on mars are too low to allow for liquid water, the extend of the ice cover is larger, when the ice receives increased insolation. Whereas on earth the ice cover is larger when insolation is low, since it gains mass from the pool of liquid water.