Components of the Earth's climate system that
vary over long timescales, such as ice sheets and vegetation, could have an important effect on this temperature sensitivity, but have often been neglected.
Not exact matches
[Response: the Milankovitch
timescale is
long and the forcing barely
varies due to orbital changes
over 100 years so no, they aren't included (they would be for people modelling the last glacial maximum); solar forcing is modelled by change in total solar irradiance (probably as a total number; not sure if changes at different wavelengths are included)-- William]