(
Orbital forcing doesn't have much of a global annual average forcing, and it's even concievable that the sensitivity to
orbital forcing as
measured in terms of global averages and the long - term response (temporal scale of ice sheet response) might be approaching infinity or even be negative (if more sunlight is directed onto an ice sheet, the global average albedo might increase, but the ice sheet would be more likely to
decay, with a global average albedo feedback that causes warming).