However, for several reasons, there is still
a significant uncertainty in the climate sensitivity parameter, which relates greenhouse gas concentration (or other forcings) to steady - state temperature.
That is to say, decisions over the next two or three decades affecting this larger context may influence the
climate of 2100 and beyond
in ways that are at least as
significant as the implications of even the major current scientific
uncertainties, like
climate sensitivity and long - term ice - sheet stability.